how long does sperm last inside the female reproductive tract?
Answers
Sperm can last inside the female reproductive tract for up to five days. After ejaculation, the sperm can stay in the female reproductive tract for about five days.
During this time, it can fertilize an egg if it is present. Sperm can only live in an ideal environment. They need to be inside the female reproductive tract to survive because it provides them with a nourishing and protective environment. An ideal environment for the sperm to survive includes a temperature of approximately 37°C, a pH of 7.4 or slightly alkaline, and the presence of cervical mucus.
If the sperm isn't inside the female reproductive tract, it will die within a few minutes because it can't survive outside of the body. After five days, the sperm will usually die, which means that the woman is no longer fertile and cannot conceive a child.
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Related Questions
Explain the formation if chyme of the scrambled eggs being faster than the other food samples
Answers
The formation of chyme from scrambled eggs may be faster compared to other food samples due to the relatively soft and easily digestible nature of the eggs, which allows for quicker breakdown and digestion in the stomach.
Firstly, the physical composition of scrambled eggs plays a role. Eggs are already in a relatively soft and easily broken down state, having been beaten and cooked prior to ingestion. This makes it easier for the stomach's muscular contractions and digestive enzymes to break down the eggs into smaller particles, aiding the formation of chyme.
Secondly, the protein content in eggs can trigger the release of gastric acid and pepsin, enzymes involved in the digestion of proteins. The presence of these enzymes speeds up the breakdown process, facilitating the formation of chyme.
Furthermore, the absence of fibrous components in scrambled eggs, which are present in many other food samples, reduces the time required for digestion. Fiber-rich foods often require more extensive mechanical and enzymatic action in the stomach to break them down into chyme.
In summary, the faster formation of chyme from scrambled eggs compared to other food samples can be attributed to their already soft and broken down state, the protein content stimulating the release of digestive enzymes, and the absence of fibrous components that require additional digestion.
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Which statement differentiates plant cells from animal cells?
Answers
Answer:
i think its d but i cant remember from when i took that exam
Explanation:
1. Match the # in the diagram with the correct word or words.
Use the word bank: Amino acid, Polypeptide chain, Codon, tRNA (anti-
codon).
Answers
The correct matching of the words in the word bank to the diagram is as follows:
A. amino acidB. Polypeptide chain (protein)C. tRNA (anti-codon)D. codonWhat are codons and anticodons?Codons and anticodons are nucleotide sequences that play a crucial role in the process of protein synthesis, which is the process by which the genetic information in DNA is used to make proteins.
A codon is a sequence of three nucleotides that specify a particular amino acid or stop signal during protein synthesis. There are 64 different possible codons, which are read by the ribosome during translation.
An anticodon is a sequence of three nucleotides that is complementary to a codon on the mRNA molecule. Each anticodon is carried by a molecule of transfer RNA (tRNA), which also carries a specific amino acid. During protein synthesis, the anticodon of the tRNA pairs with the codon on the mRNA, allowing the correct amino acid to be added to the growing polypeptide chain.
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Which of the following discoveries were the result of Erwin Chargaff's experiments?
Answers
Answer:
A
Explanation:
The four bases found in DNA are adenine, thymine, cytosine and guanine.
what is respiration
Answers
Answer:
energy consuming process is called respiration
Answer:a process in living organisms involving the production of energy, typically with the intake of oxygen and the release of carbon dioxide from the oxidation of complex organic substances.
Explanation:plz mark brainliest
Use the sentences to complete the activity.
Today I learned some sick stuff about volcanoes! The hot dangerous stuff comes outta the top where it sometimes goes boom!
The red stuff can be sticky or runny. These things cause lotsa damage. But they can help out sometimes, too.
Revise the sentences so that they could be used in a report for this course. Be sure to remove any informal language and use jargon
where appropriate.
(4 points)
Answers
Answer:
Today I learned some interesting things about volcanoes. The hot, dangerous, lava comes out of the top of the volcano, where it can sometimes explode. The lava can be sticky, or runny. These things cause a lot of damage but can help sometimes as well.
Explanation:
hope i helped
here this might help
Today i Learned cool facts about volcanoes! The hot dangerous liquid called lava it comes out of the top on rare occasions the volcano erupts The red lava can be tacky or watery . lava causes a lot of damage although I found out that it sometimes can help out in some ways.
Pooh had a colony of tiggers whose stripes went across the body. His American pen-pal, Yogi, sent him a tigger whose stripes ran lengthwise. When Pooh crossed it with one of his own animals, he obtained plaid tiggers. Interbreeding among the plaid tiggers produced litters of a majority of plaid members, but some crosswise- and lengthwise-striped animals were also produced. Diagram the crosses made Pooh, showing the genotypes of the tiggers which account for the coat patterns observed.
Answers
In this case, the parental are lengthwise stripes (genotype ls/ls) and plaid stripes (genotype Ps/Ps), the F1 is plaid (100%) and F2 is plaid (75%) and lengthwise (25%). It is a Mendelian inheritance pattern.
Mendelian inheritance and complete dominanceComplete dominance occurs when the dominant allele (in this case, the plaid stripe trait) completely masks the recessive allele (lengthwise stripes) in heterozygous individuals.
The cross between tigers having lengthwise stripes (genotype ls/ls) and plaid stripes (genotype Ps/Ps) will produce an F1 100% having the plaid stripes (genotype Ps/ls) trait because this trait is dominant.
In the F2 obtained by crossing heterozygous plaid stripes individuals (genotype Ps/ls), the recessive trait 'lengthwise stripes' will be observed (again) in a proportion of 3:1.
In this case:
P >> lengthwise stripes x plaid stripes F1 >> 100% plaid stripes F2 >> plaid stripes (75%) and lengthwise-stripes (25%)Learn more about Mendelian inheritance here:
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Bill is a young man who has noticed lately that he cannot remember new information. He forgets the names of people he just met, is constantly losing his keys and is having trouble at work as an accountant because he cannot remember information his clients tell him. This has not been a problem until very recently and he is not having trouble remembering other older memories such as his families’ names and his address. What is the name of the part of the brain that is not working?
Answers
Answer:
cerebrum
Explanation:
cerebrum is the seat of consciousness, intelligence, memory, judgement, learning and interpreter of sensation and imagination.
Cerebrum is the part of the brain that is not working.
What is Cerebrum?The cerebral hemispheres are the two hemispheres, or halves, that make up this structure. Speech, thought, emotions, reading, writing, and learning are all governed by regions of the cerebrum.
The largest and topmost part of the brain is called the cerebrum. Two-thirds of the weight of the brain is made up of the cerebral hemispheres, which make up the cerebrum.
Language and speech are governed by the functionally dominant hemisphere, which is often the left. The opposing hemisphere decodes spatial and visual information.
Therefore, Cerebrum is the part of the brain that is not working.
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Which is an example of genetic diversity within a rain forest?
A. All of the genes found within an ecosystem
B. DNA of a single three-toed sloth
C. Many variations of a Jaguar spots
D. Wide variety of beetle specie
Answers
Answer:
A.All of the genes found within an ecosystem
Body Surface Area -adapted from the Redlarski’s paper (link)
Body surface area (BSA) plays a key role in several medical fields, including cancer chemother-
apy, transplantology, burn treatment and toxicology. BSA is often a major factor in the
determination of the course of treatment and drug dosage. A series of formulae to simplify
the process have been developed. Because easy-to-identify, yet general, body coefficient re-
sults of those formulae vary considerably, the question arises as to whether the choice of a
particular formula is valid and safe for patients. These empirical formulae are derived by
observing/fitting the experimental data and do not have a rigid model or reason explain-
ing their validity. In this problem, you will build a physics model to create your own BSA
equation other than using an empircal formula.
(a) Use a cylinder of height H and radius r as a approximation of the shape of a human.
Calculate the human’s body surface area(BSA), volume(V), and mass(M) in terms of
r and H. You may assume the density of human is 1000 kg/m3.
(b) Rewrite the surface area in in terms of height and mass.
(c) According to the equation you derived above, what is your body surface area? Is it the
same as the result calculated by using the empirical fomulae: BSA = √M H/C with
BSA in m2, M in kg, H in cm, and C=60 is a constant in this paper? If not, what is the percentage differences?
Note: percentage difference for two values E1 and E2 are |E1−E2|
(E1+E2)/2 ×100%.
(d) Considering the formula BSA = √MH/C with fixed H, plot a graph with BSA on
the y-axis and M on the x-axis. Explain what the trend/curve means.
(e) Considering the formula BSA = √MH/C with fixed BSA, plot a graph with H on
the y-axis and M on the x-axis. Explain what the trend/curve means.
(e) Considering the formula BSA = √MH/C with fixed BSA, plot a graph with H on
the y-axis and M on the x-axis. Explain what the trend/curve means.
Answers
a)Using a cylinder of height H and radius r as an approximation of the shape of a human, the surface area, volume, and mass are calculated in terms of r and H as follows:
Surface area (S) of a cylinder is 2πrh + 2πr², where h is the height, and r is the radius of the cylinder. In this case, the height of the cylinder is equivalent to the height of the human body. Hence;S = 2πrH + 2πr²Mass (M) of a cylinder is given by M = ρV, where ρ is the density of the cylinder, and V is the volume. Hence, the mass of a cylinder in terms of its radius and height isM = πr²HρVolume (V) of a cylinder is given by V = πr²H. Hence, the volume of a cylinder in terms of its radius and height isV = πr²H(b)The body surface area (BSA) of a human can be rewritten in terms of the height (H) and mass (M) as follows:
BSA = √(M/H C)We can rewrite it as H = M/ (BSA² C)Thus, H can be expressed as a function of M and BSA asH = M/(BSA² C)(c)If r = 0.15 m and H = 1.70 m, then using the equation, S = 2πrH + 2πr², the body surface area is given as:
S = 2π (0.15)(1.70) + 2π (0.15)² = 1.77 m²Using the empirical formula, BSA = √(MH/C) with M = 60 kg and H = 170 cm, we get BSA = 1.85 m²The percentage difference is given by;|E1 − E2| / (E1 + E2) / 2 × 100%where E1 = 1.77 m² and E2 = 1.85 m²Thus;|1.77 – 1.85| / (1.77 + 1.85) / 2 × 100% = 4.2%(d)Considering the formula BSA = √(MH/C) with fixed H, a graph with BSA on the y-axis and M on the x-axis can be plotted.The trend shows a non-linear increase in BSA as the mass increases.
(e)Considering the formula BSA = √(MH/C) with fixed BSA, a graph with H on the y-axis and M on the x-axis can be plotted.The trend shows a linear increase in height as the mass increases.
About HumanHuman are the most numerous and widespread primate species. They are a type of great ape that is characterized by a bipedal gait and capable cognitive abilities thanks to their large and complex brains. From the moment humans were created, somatic cell chromosomes have a total of 46 egg cells or sperm cells have only 23 chromosomes. The existence of fertilization returns the number of chromosomes of body cells to 46.
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Oceans are being threatened daily by human activities which of the following best describes one way oceans are being impacted?
Answers
Use your knowledge of the structure of DNA to circle a nucleotide on the image below.
Answers
Answer:
Im not sure how to circle but the three components should be circled...
Explanation:
There are 8 nucleotides in this picture.
A nucleotide consists of a phosphate group (the blue circle), a pentose sugar (the blue pentagon), and a nitrogenous base (the red, green, purple, and yellow hexagons). One nucleotide would only have one of the nitrogenous bases.
Lab #4: Telescope Optics (continued) Page of 6 Telescopes that collect light use enses or mirrors modify the paths of light rys. Light rays entering transparent substance such as glass or plastic will bend in accordance with the law of refraction. Light rays falling upon reflectire substance such as polished aluminum will bounot accordance with the law of reflection: In thep procedures that follow, arrange the components in the Ray Optics Demonstration Set as shown_ measure the angles = of refraction and reflection, and make Rraph = illustrating the behavior of light rays in each case: The Law of Refraction INCIDENCE Center the protractor sheet the white magnetic board 1 shownn Note orientation of thezero degree index: Positian the reer Ray Box (LRB) so that only one enters the plastic LRB half round lens shown For the angles of incidence in 1 the table on page fOur, record angles retructin_ Then plot the points on the NOIjJYd:3U = graph using unfilled circles: INCIDENCk The Law of Reflection Center the prutractor sheet 1 on the white magnetic board a5 shown: Position the Laser Ray Box that only one ray falls upon the flat mirror Fhmint For the angles of LRB incidence in ethe table page fOur; record the angles of reflection: Then plot the L MIRROR mointe the graph using SIDE filled circles: Jto3 Inno more than = few AcenenGm compare what happens to the light ray rincreased In ench case: the angle ofincidence
Answers
Telescopes use lenses or mirrors to manipulate light paths. Transparent substances follow refraction, while reflective surfaces follow reflection.
Telescopes utilize optical components such as lenses or mirrors to manipulate the paths of light rays. When light rays pass through transparent substances like glass or plastic, they undergo a change in direction due to the phenomenon of refraction. This bending of light follows the law of refraction, which relates the angle of incidence to the angle of refraction.
On the other hand, when light rays encounter reflective surfaces like polished aluminum, they undergo reflection, obeying the law of reflection. The law of reflection states that the angle of incidence is equal to the angle of reflection, with both angles measured relative to the normal of the surface.
In the given lab instructions, the Ray Optics Demonstration Set is used to measure the angles of refraction and reflection and create a graph illustrating the behavior of light rays in each case. By comparing the angles of incidence and observing how they change with increased incidence, students can analyze the behavior of light rays in different optical configurations.
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Which statement accurately describe animals? Check all that apply
Answers
Answer:
the 2, 3, and 5.
How have the people in Australia been affected by rabbits in Australia?
Choose all that apply
Responses
Their tax dollars have been used to try to control the rabbit population.
Rabbits are a food source for grazing livestock.
Rabbits might eat farmers' crops.
Rabbits eat vegetative cover, which has caused a decreased amount of food available for grazing livestock.
Answers
Answer:
Their numbers became so large that they destroyed crops and land, leading to soil erosion.
Answer:
Rabbits might eat famers' crops.
Their tax dollars have been used to try to control the rabbit population
Rabbits eat vegetative cover, which has caused a decreased amount of food available for grazing livestock.
Explanation:
I took the test
Which of the following is NOT a trigger of coral bleaching? death of zooxanthellae whaling acidification increased water temperature
Answers
Answer:
Whaling
Explanation:
The rest have all proved to trigger coral bleaching.
Answer:
whaling
Explanation:
A baseball in motion is acted upon by four directional forces as shown
What must be true of the forces for the baseball to continue to move in the same direction with the same speed?
Answers
Answer:what is the answer
Explanation:
What is the effect of changing the environment on the feeding of birds with different beaks?
Answers
The exact traits of each bird's beak and the type of environmental alteration will determine how changing the environment will affect how various beaked birds eat.
For instance, birds with long, narrow beaks designed for digging deeply into blossoms or grabbing insects may have a tougher difficulty locating food if the environment gets drier and food sources become limited.
Their population might decrease as a result of this. Similarly to this, birds with short, broad beaks that are evolved to split apart seeds may have a tougher difficulty locating food if the environment becomes wetter and food sources become limited.
On the other hand, if the environment changes in a way that creates new food sources, birds with beaks adapted to exploit those resources may do well. For example, if a new type of berry becomes available, birds with beaks adapted for eating berries may thrive in that environment.
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what two materials are part of soil?
a) pieces of metal
b) once-living matter
c) small bits of rock
d) trees and grass
Answers
Answer: Once Living Matter, Small bits of rock
Explanation: CANVAS VERIFIED
Answer:
Small bits of rock and once living matter
Explanation:
the white, greasy, cheeselike substance that covers the fetus's skin is called
Answers
it's called vernix caseosa
2. What forms the start, or bottom, of the food web at these hydrothermal
vents?
a. vent shrimp
b. yeti crabs
O c. bacteria
O d. barnacles
Answers
vents?
a. vent shrimp
b. yeti crabs
O c. bacteria
O d. barnacles
Answer:c.bacteria
What are the symptoms of poor blood circulation in the legs.
Answers
Answer:
1. Numbness of Extremities
2. Fatigue
3. Loss of Appetite
4. Digestive Issues
5. Weak Immune System
6. Chest Pressure
7. Decreased Cognitive Ability
8. Cold Extremities
9. Skin Discoloration
10. Dark Eye Circles
Name the initial and final products of photosynthesis?
Answers
In the process of photosynthesis, glucose, oxygen, and water are produced.
Answer:
Initial products of photosynthesis
The first product of photosynthesis is sugar.
Final products of photosynthesis
Light energy converts carbon dioxide and water into glucose and oxygen.
A scientist is investigating the effect of a pesticide on the
ability of certain types of weeds to produce seeds. The
scientist plans to conduct a test to find out whether the
amount of pesticide will affect whether a weed makes
seeds.
Which type of scientific investigation does this plan describe?
A. Experimental investigation
B. Theoretical investigation
C. Descriptive investigation
D. Comparative investigation
Answers
The type of scientific investigation of a plan based on conducting a test to find out whether the amount of pesticide will affect whether a weed makes seeds is A. Experimental investigation.
What is an experimental investigation procedure?An experimental investigation procedure refers to formulating a given test in controlled conditions in order to determine if our working hypothesis can be confirmed or needs to be rejected, which is a fundamental step of the scientific method.
Therefore, with this data, we can see that an experimental investigation procedure allows us to confirm or reject the hypothesis.
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C.elegans is a model organism and was the first eukaryotic organism to have its genome sequenced. The free-living nematode is often used in laboratories investigating nervous system development with all 302 of its neurons and their effectors categorized. Interesting control mechanisms have been investigated with reproduction, particularly with egg-laying in the nematode. There are 16 muscles, 2 types of neurons, and multiple receptors involved in the process of laying eggs in C.elegans, and there are mutations in all of those structures for the study of the process. One particular mutation that prevents the laying of eggs by the worm is rescued by the neurotransmitter, serotonin. That rescue suggests that the mutation is most likely in which of the following?
A. one of the muscles needed for egg-laying
B. a receptor for serotonin on cells needed for egg-laying
C. a pre-synaptic neuron involved in egg-laying
D. a post-synaptic neuron involved in egg-laying
Answers
Answer:
C. a pre-synaptic neuron involved in egg-laying
Explanation:
Serotonin (5-HT) is a neurotransmitter, i.e., a molecule that binds to specific receptors and thus transmits signals from one pre-synaptic neuron to another target cell. In humans, serotonin is involved in many physiological functions including sleep, mood, emotions, appetite, digestion, etc. Moreover, Caenorhabditis elegans is a model organism widely used in neuroscience research in order to understand neuromodulation at the level of individual neurons. In C. elegans, serotonin modifies behavior by regulating neuronal excitability and synaptic efficiency. Moreover, also in C. elegans, it has been shown that serotonin induces egg-laying and also provides a feedback regulatory mechanism by inhibiting the activity of the pre-synaptic neurons that release it. In consequence, in this case, it is expected that serotonin rescues the loss of function of serotonin receptors required for egg-laying by providing a regulatory feedback loop that contributes to serotonin adaptation.
Read the article to learn more about the human chromosomes. Use chromosomes 11 and 17 to answer the following questions. Chromosome Map Chromosome 17 is made of over million base pairs. Approximately how many genes are found on chromosome 17?
Answers
Chromosome 17 is made of over 80 million base pairs.
Approximately 1600 genes are found on chromosome 17.
A chromosome is a long DNA molecule with element or all of the genetic material of an organism. In maximum chromosomes the very long thin DNA fibers are coated with packaging proteins; in eukaryotic cells the maximum vital of these proteins are the histones.
The principle function of chromosomes is to hold the DNA and switch the genetic records from dad and mom to offspring. Chromosomes play an crucial position all through cell department. They defend the DNA from getting tangled and broken.
Chromosomes are systems discovered within the center (nucleus) of cells that convey lengthy portions of DNA. It's far the constructing block of the human body. Chromosomes additionally incorporate proteins that help DNA exist within the right shape.
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Three cells with generation times of 60 minutes are inoculated into a culture medium. Assuming no lag phase takes place, how many cells are there after 5 hours?.
Answers
There are 96 cells are there after 5 hours.
The lag period is the adaptation period during which bacteria adapt to new conditions. The length of the induction period varies greatly depending on the conditions under which the bacteria were generated and the conditions different from the state of the bacterial cell itself.
The number of bacteria in the culture increases according to the law of exponential growth. 100 bacteria in 3 hours, 800 bacteria in 6 hours. The lag phase is one of the earliest stages of the bacterial growth cycle. At this stage, bacteria tend to adapt to growth conditions. Here individual bacteria mature but do not yet divide. Enzymes, RNA, and various molecules are synthesized during this stage of the growth cycle.
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Which of the following does NOT occur during the G 2 phase of the cell cycle? A. The G2/M checkpoint is reached. B. DNA replication and error checking are completed. C. The cell completes preparation for mitosis. D. The cell divides. E. All of these occur during the G2 phase of the cell cycle.
Answers
Option (D) "The cell divides" does NOT occur during the G2 phase of the cell cycle.
The cell cycle consists of several phases, including the G1 phase, S phase, G2 phase, and M phase (mitosis). Each phase has specific events and processes associated with it. The G2 phase is the third phase of the cell cycle, following the S phase where DNA replication occurs.
During the G2 phase, the cell completes preparation for mitosis, ensuring that all necessary components for cell division are in place. This includes checking for any errors or damage in the replicated DNA and repairing them. The G2 phase also involves reaching the G2/M checkpoint, which serves as a control point to ensure that the cell is ready for mitosis.
However, cell division, which is the actual process of splitting into two daughter cells, does not occur during the G2 phase. Cell division takes place during the M phase, specifically during the stages of mitosis and cytokinesis.
In summary, option (D) "The cell divides" does not occur during the G2 phase of the cell cycle. The G2 phase is primarily focused on completing preparation for mitosis and ensuring the integrity of the replicated DNA before entering the M phase for cell division.
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can anyone help me with this question? Thank you.
Answers
Answer:
At B part.
Explanation:
At B part the nightfall will happen first because the B part is in the shade and will not present in front of the sun. When the earth rotates its own axis, the shaded part which is B comes in front of sun which means day time is started while on the other hand, the A part is in the shade and will experience nightfall so we can say that the nightfall occurs at B part of the earth.
food provides living things with the raw materials and ____? needed to grow