Answer: A nucleus is basically the brain of the cell. It is in the center of the cell and surrounded by a membrane. The nucleus contains all the chromosomes and controls the cell's growth and reproduction of the cell.
Question no.02: Why spermopsida termed as successful group of land plant.
Answer:
because they are vascular plants.
Explanation:
I looked it up
When comparing the lytic and lysogenic cycle of bacteriophages. which of the following is uniquely characteristic of the lysogenic cycle?
A) Cell Lysis
B) Prophage
C) Replication of phage DNA D) Synthesis of phage proteins
The unique characteristic of the bacteriophages' lysogenic cycle when compared to the lytic cycle is b.prophage.
What is the lysogenic cycle?The lysogenic cycle is the viral genome replication cycle without destroying the host cell, but the virus integrates into the host chromosome. This integration process is called a prophage.
The lysogenic cycle does not involve host cell destruction/death processes. In this cycle, the DNA of the virus combines with the DNA of the bacterial cell to form a prophage. The goal of this cycle is to create a host cell that contains a prophage. Later the host cell will divide along with the replicating viral DNA.
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II. PARTS OF THE DIGESTIVE TRACT A. ORAL CAVITY After ingestion, the physical breakdown of solid foods (mechanical digestion) begins in the oral cavity (mouth). Describe how food is mechanically digested in the oral cavity. Include a discussion of how the teeth, tongue, and saliva work together to convert solid food into a moist, semi-solid mass of food called a bolus. Example: think of how a hard, dry saltine cracker is converted into a moist ball (bolus) in the mouth. B. PHARYNX and ESOPHAGUS 1. After food has been mechanically digested, mixed with saliva, and a bolus has formed, it is swallowed. Swallowing moves the bolus from the mouth into the esophagus. Discuss the events that occur during swallowing. 2. Which portions of the pharynx does food pass through when swallowing
Answer:
This begins with the gradual breaking down of the food in the mouth, by grinding the food substances with the teeth this is mastication, and the secretion of saliva, which moisten the food, soften it so that the salivary amylase enzyme, carried out the mechanical digestion.
Swallowing is a wavelike muscular contraction which involve the contraction of the longitudinal and circular muscles of the oesophagus, which pushes the bolus down to the stomach.
The food pass Oropharynx. While the epiglottis prevents the bolus from entering the trachea.
This is followed by the rolling up of the tongue, the pushing the broken down food now chyme towards the back of the mouth, pressing it against the soft palate. At this stage a bolus is formed.From here it is pushed into the throat,where it is pushed down the oesophagus by peristalsis.
Explanation:
what is an example of a base a. vinegar b.carbonic acid c. sodium hydroxide d. hydrochloric acid
An example of a base is sodium hydroxide. In this case option C is correct
What are bases?
a substance with the ability to absorb hydrogen ions from water and neutralize acids in chemistry. The skin may feel slippery or soapy when exposed to bases, which can turn some colors blue. A base is best represented by sodium hydroxide.
Acids are defined as substances that contain hydrogen and have the capacity to donate a proton (hydrogen ion) to another chemical. Any molecule or ion that can absorb the hydrogen ion from an acid is known as a base. Usually, acidic chemicals can be distinguished by their sour tastes. Having more positively charged hydroniums than negatively charged hydroxyls indicates that the substance is acidic. In an aqueous solution, bases are a category of chemical that emit hydroxide (OH-) ions, accept protons, or give away electrons.
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A chemical formula shows the kind and number of atoms that form a
Please write 5 sentences to this
Similarities between cells and viruses includes:
Both cells and viruses have nucleic acid genomes based on the same genetic code that's used in cells.Both cells and viruses has genetic variation and can evolve.The differences between cells and viruses are:
Cells can exist by themselves while viruses need a living host in order to reproduce.Cells are the basic units of life, Viruses are non-living infectious particles.The 4 parts of a virus are:
Nucleoid Capsid EnvelopeEnzymes.What is a virus?A virus can be described as a submicroscopic infectious agent that replicates only inside the living cells of an organism.
The virus consists of a single molecule of nucleic acid surrounded by a protein coat called the capsid.
In conclusion, viruses shares some differences and similarities between cells.
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Without oxygen, which of the following could not occur in cellular respiration?
Responses
the creation of some ATP through fermentation
oxidative phosphorylation of ATP
the recycling of NADH to NAD+
the formation of lactate from pyruvate
The oxidative phosphorylation of ATP could not occur in cellular respiration without oxygen because oxygen is the last electron acceptor in the electron transport chain.
What is the process of the electron transport chain?The process of the electron transport chain refers to a key issue in oxidative phosphorylation (the third stage of cellular respiration), which is used to create ATP.
Therefore, with this data, we can see that the process of the electron transport chain is required to produce ATP during cellular respiration and oxygen is the electron acceptor of this process.
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Which letter would represent the Sun on the
HR-Diagram below?
A
D
B
A
Brightness
C
B
Temperature
E
D and E
с
The Science Duo
x
QUE
*
Answer: A
Explanation:
It has the highest temperature + brightness
A poison placed on the tips of darts by natives of the Amazon rainforest paralyzes prey such as small mammals. Which of the prey's cells are most likely affected by the poison?
muscle cells
epithelial cells
red blood cells
white blood cells
Answer: Muscle cells
Explanation: this would cause them to be unable to move as effectively, which would lead to paralyzation.
HELP ASAP!!!
Proteins are a type of biomolecule with a wide variety of functions. Which statement is correct about the digestive system and proteins?
Question 1 options:
Enzymes in your saliva start breaking down the carbohydrates in food
Ready to use energy is released as the protein is broken down
The large intestine absorbs proteins for use in cells.
The liver manufactures bile salts that help break down fats in proteins
Answer:
Enzymes in your saliva start breaking down the carbohydrates in food
Explanation:
It makes sense, your digestive system consists of your mouth, esophagus, stomach, pancreas, liver, gallbladder, small intestine, large intestine, and anus. As soon as you put food in your mouth you break down your food. Also I took the test, hope you make an good grade!!!
The statement 'enzymes in your saliva start breaking down the carbohydrates in food' is correct about the digestive system and proteins.
The digestive system is an organ system where organs work together to digest foods.Enzymes are specific proteins that carry out specific chemical reactions.Digestive enzymes such as amylase are secreted by the salivary glands in order to help with the digestion of foods.
In conclusion, the statement 'enzymes in your saliva start breaking down the carbohydrates in food' is correct about the digestive system and proteins.
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What is the difference between science and non-science? (3 points)
A. Science is absolute knowledge based on prediction and guessing
B. Science uses only absolute truths without evidence
C.There are no errors in science
D.Science looks for evidence of phenomena in the natural world
Answer:
d
Explanation:
science depends on facts. no guessing, no predictions
Answer: D
Explanation:
Which statement best describes a reliable source of information?
A source that follows the scientific method.
A source that includes the evidence to persuade a side.
A source that includes opinions to support a claim.
A source that uses pseudoscience to gather evidence.
The statement best describing a reliable source of information is:A source that follows the scientific method.
A reliable source of information is one that follows the scientific method. The scientific method is a systematic approach to investigating phenomena, which involves formulating a hypothesis, conducting experiments or observations, collecting data, and drawing conclusions based on evidence. By adhering to the scientific method, a source ensures that its information is based on rigorous and objective analysis.
A reliable source of information focuses on providing evidence to support its claims rather than relying on opinions. It presents data, facts, and research findings obtained through scientific studies or credible sources. This evidence-based approach adds credibility to the information presented and allows readers to evaluate the validity of the claims.
On the other hand, a source that includes opinions to support a claim may lack objectivity and can introduce bias into the information. Opinions alone do not necessarily provide a reliable basis for making informed judgments or decisions.
A reliable source also avoids the use of pseudoscience to gather evidence. Pseudoscience refers to claims or practices that are presented as scientific but lack the rigorous scientific methods and evidence required for validation. Such sources often promote ideas that are not supported by credible scientific research and can mislead readers.
In summary, a reliable source of information is one that follows the scientific method, presents evidence to support claims, avoids relying solely on opinions, and does not use pseudoscience to gather evidence. By adhering to these principles, a source can provide trustworthy and accurate information to its audience.
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Which statement about ecosystems is true
The correct answer is D. Ecosystems are always smaller than a biome.
Explanation
A biome is a set of abiotic factors that form a territory in which different organisms inhabit. In addition, biomes encompass a set of ecosystems such as tundra, rainforest, savannas, wetlands, among others. On the other hand, an ecosystem is a community of organisms that interact with other organisms and abiotic factors. According to the above, the correct answer is D. Ecosystems are always smaller than a biome becaause biomes includes ecosystems with similar features.
Which process makes diversity possible
For each item below, specify the independent and dependent variables, as well as constants.
1. The time it takes to run a mile depends on the person's running speed.
2. A study was done to find if different tire treads affect the braking distance of a car.
3. The height of bean plants depends on the amount of water they receive.
4. The higher the temperature of the air in the oven, the faster a cake will bake.
5. Lemon trees receiving the most water produced the most lemons.
6. An investigation found that more bushels of potatoes were produced when the soil was
fertilized more.
7. Students measured the temperature of the water at different depths in Lake Skywalker and
found that the temperature varied.
8. The amount of pollution produced by cars was measured for cars using gasoline containing
different amounts of lead.
9. Four groups of rats are first massed and then fed identical diets except for the amount of
vitamin A they receive. Each group gets a different amount. After 3 weeks on the diet, the rats
masses are measured again to see if there has been a decrease.
For each of the given items, the independent and dependent variables, as well as constants are those variables that produce a change in another, the variable that depends on another to change, and that which does not change respectively.
What are dependent and independent variables?In a scientific experiment, an independent variable is a variable that is altered or controlled to see how it affects the dependent variable. In a scientific experiment, the variable under test and being measured is known as the dependent variable.
A constant in an experiment does not vary but remains unchanged at the end of the experiment.
Considering the given items, the independent and dependent variables, as well as the constants are as follows:
Independent variable: running speed; Dependent variable: the time it takes to run a mile; Constant: distance of the runIndependent variable: tire treads; Dependent variable: braking distance of a car; Constant: speed of the carIndependent variable: the amount of water; Dependent variable: height of bean plants; Constant: type of bean plantIndependent variable: temperature of the air in the oven; Dependent variable: the time it takes for a cake to bake; Constant: type of cakeIndependent variable: the amount of water; Dependent variable: the number of lemons produced; Constant: type of lemon treeIndependent variable: the amount of fertilizer; Dependent variable: number of bushels of potatoes produced; Constant: soil typeIndependent variable: depth of the water; Dependent variable: temperature of the water; Constant: time of dayIndependent variable: the amount of lead in gasoline; Dependent variable: the amount of pollution produced by cars; Constant: type of carIndependent variable: the amount of vitamin A; Dependent variable: change in rat mass; Constant: type of rat, diet composition, feeding schedule, etc.Learn more about dependent and independent variables at: https://brainly.com/question/25223322
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The unit discusses the problems with deforestation. What other problems could the extreme environmental damage caused by the kind of mining done in the Appalachians create?
I'm not sure if anyone can help me with this one, but if you can that'd be great! I have to write in the answer but I'm just looking for an idea. Thank you!
Answer:
Mining in the Appalachians has caused debris and harmful chemicals to land in the local waterways. The large amount of waste and dirt has also changed the course of the canals.
Explanation:
I took a majority of the information from a quiz prior to this assignment. I know that this is several days after you requested help but I hope that this helps you and other students!
Describe at least three things we can do to slow down the aging process of
tissue
Answer:
1. Protect your skin from the sun every day.
2. Apply self-tanner rather than get a tan.
3. If you smoke, stop.
4. Avoid repetitive facial expressions.
5. Eat a healthy, well-balanced diet.
6. Drink less alcohol.
7. Exercise most days of the week.
8. Cleanse your skin gently
Explanation:
Answer:
Eating healthy,and staying away from a lot of tanning beds
Explanation:
Two different enzymes catalyze the same reaction and both exhibit the same Vmax. When Enzyme A was run with a 40 uM substrate, the initial rate (Vo) was 10 uM/min, and when g it was run with a 4 mM substrate, the Vo was 20 uM/min. Estimate the approximate Vmax and Km of Enzyme A. When Enzyme B was run with 80 uM substrate, the initial rate (Vo) was 10 uM per minute. Estimate the Km of Enzyme B.
Answer:
a) k_m = 4.08 uM
V_{max} = 20.07 uM/min
b) k_m = 8.16 uM
Explanation:
Given that:
For Enzyme A:
the substrate concentration [S] = 40 uM
the initial velocity rate v = 10 uM/min
when it was 4mM, v = 20 uM/min
i.e.
at 4mM = 4000 uM;
Using Michealis -menten equation;
when v = 10
\(V = \dfrac{V_{max}[S]}{k_m+[S]}\)
∴
\(10 = \dfrac{V_{max}\times 40}{k_m + 40}\)
\(10 (k_m + 40) = V_{max}40\)
\(40V_{max} -10k_m = 400 --- (1)\)
when v= 20
\(20= \dfrac{V_{max}\times 4000}{k_m + 4000}\)
\(20 (k_m + 4000) = V_{max}4000\)
\(4000V_{max} -20k_m = 8000 --- (2)\)
equating equation (1) and (2):
\(40V_{max} -10k_m = 400 --- (1)\)
\(4000V_{max} -20k_m = 8000 --- (2)\)
let multiply equation (1) by 100 and equation (2) by 1
4000V_{max} - 1000K_m = 4000
4000V_{max} - 20 k_m = 8000
0 -980k_m = 4000
k_m = 4000/-980
k_m = 4.08 uM
replacing the value of k_m into equation (1)
40{V_max } - 10(4.08) = 400
40{V_max } - 40.8 = 400
40{V_max } = 400 + 40.8
40{V_max } = 440.8
V_{max} = 440.8/40
V_{max} = 11.02 uM/min
b)
Since V_{max} of A ie equivalent to that of B; then:
V_{max} of B = 11.02 uM/min
Here;
[S] = 80 uM
V = 10 uM/min
∴
\(10 = \dfrac{11.02 \times 80}{k_m + 80 }\)
10(k_m +80) = 881.6
10k_m = 881.6 - 800
10k_m = 81.6
k_m = 81.6/10
k_m = 8.16 uM
A student found the following flowchart in a textbook.
Glycolysis
Krebs cycle
Electron transport chain
Which statement is the best summary of the process shown?
O A. Energy in food is released and stored in ATP molecules.
B. Energy from sunlight moves through trophic levels.
O C. Chemical energy is converted to kinetic energy.
D. Solar energy is converted and stored in chemical bonds.
SUBMIT
Answer:
Ok... so it's A I just did it but
Explanation:
WHAT IS THAT COMMENT ABOVE ME
All the statements in the questions are true as this is what exactly happens in the cycles. Energy is changed into chemical energy and it moves through levels to the the main last receiver.
What is the energy currency of cell ?ATP that stands for adenosine transport energy is the energy currency of the cell.
Energy in food is released and stored in ATP molecules. Energy from sunlight moves through trophic levels.Chemical energy is converted to kinetic energy. Solar energy is converted and stored in chemical bonds. These all statements are true as this is the truth that energy is recieved from sun in the form of solar energy where it is converted into chemical energy then this.
Chemical energy is converted into the kinetic energy where the energy is stored in the form of ATP that is the energy source or currency that will play the role in providing energy for the mechanisms to be occurring in the body.
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Help Please 100 Points!! If u steal points u get banned!
At least Have a nice amount of information!
Describe 3 Native animals species found in the Blue Ridge Moutains
At least 1 of the 3 animals needs to be endangered or threatened
Include the role of the species that plays in an energy pyramid
Explain the special adaptations that the animals exhibit that help them to survive in this biome.
The answers include the following:
The 3 Native animals species found in the Blue Ridge Moutains are mice, fox and elk.The mice and elk are primary consumers while fox is referred to as secondary consumer.Small ears and nose to reduce the rate of heat loss in the body.What is Energy pyramid?This is referred to as the graphical representation of the energy found within the trophic levels of the ecosystem which consists of different types of organisms.
The animals which are found in these region include mice, fox and elk and the elk is the endangered specie. They also have different adaptations such as mall ears and nose to reduce the rate of heat loss in the body.
Another adaptation is strong hoof which is used to climb the rocky terrain of the mountains.
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How are c4 pathway and the cam pathway an adaptive strategy for some plants
Answer:
sir sorry
Explanation:
6. Rebecca wants to see if her kitten prefers new chicken flavored treats over her
usual beef flavored treats. She puts 10 chicken treats in one bowl and 10 beef
flavored treats in another bowl. She sees which treats her kitten eats first and
repeats this experiment for 3 days,
a. Independent Variable =_
b. Dependent Variable =
c. Control =
Answer:
independent: treat flavor
dependent: which treat the kitten eats first
control: beef flavored treat
Explanation:
In Rebecca's experiment, the independent variable is the type of treat, the dependent variable is the kitten's preference of treat, and the control includes factors such as the number of treats in each bowl and the timing of the experiment.
Explanation:In this experiment, the independent variable is the type of treats given to the kitten, either chicken flavored or beef flavored. The dependent variable is the kitten's preference, determined by which bowl the kitten eats from first. The control could be factors like the number of treats in each bowl (which is kept constant at ten), the time of the experiment, the location of the bowls, etc, which are kept unchanged in the experiment to ensure that any change in the kitten's behavior can be attributed to the change in the variable being tested, not due to some extraneous factors.
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Put these statements in correct order to understand how hearing works. - Ions enter hair cells - Stapes moves - auditory cortex recognizes the sounds - hair cells bend - Incus moves - auditory nerve transmits the signal to the auditory cortex - Fluid wave moves across Organ of corti based on frequency - Sound wave enters inner ear - Fluid in the cochlea moves - sound wave is generated from hitting a key on a piano
Answer: From the question,the correct order of how hearing works is listed below:
--> sound wave is generated from hitting a key on a piano,
--> Incus moves,
--> Stapes moves,
--> Sound wave enters inner ear,
--> Fluid in the cochlea moves,
--> Fluid wave moves across Organ of corti based on frequency,
--> Ions enter hair cells,
--> hair cells bend,
--> auditory nerve transmits the signal to the auditory cortex,
--> auditory cortex recognizes the sounds.
Explanation:
In mammal, two ears are present on each side of the head. It is know as the organ for hearing and balance. The ear is divided into three regions:
--> OUTER EAR: This consists of pinna, ear canal, and eardrum( tympanic membrane)
--> MIDDLE EAR: This consists of the ear ossicles ( malleus, incus and stapes).
--> INNER EAR: This consists of Cochlea (organ of hearing) and semicircular canals (for balance).
To explain further on how we hear sounds, the vibrations of sounds produced from an external source move from the outer ear to the middle and then to the inner ear where the cochlea, the organ for hearing is located.
As sound wave is generated from hitting a key on a piano, the pinna collects the sound waves and directs them into the ear canal. Sound waves impinge on the tympanic membrane and makes it vibrate. This causes the malleus, incus and stapes (in this order) to move to-and -fro at the middle ear region.
In the inner ear region, sound wave enters inner ear as stapes pushes the oval window in-and-out. The vibrating oval window causes the fluid in the cochlea( perilymph) to move to-and -fro. Fluid wave moves across Organ of corti based on frequency. The pressure waves in the perilymph push the membrane separating the upper canal and the cochlear duct to-and-fro allowing ions to enter the hair cells. As a result, the hairs of the sensory cells between these two membranes bend causing nerve impulses to be sent to the brain through the cochlear part of the auditory nerve. Auditory nerve transmits the signal to the auditory cortex which recognizes the sounds.
1. What pathway is used to make glucose from other metabolites such as oxaloacetate?
why antarctica takes 6 month to receive solar radiation?
How long does food spend getting digested in the stomach
Answer:
about six to eight hours
Explanation:
Digestion time varies among individuals and between men and women. After you eat, it takes about six to eight hours for food to pass through your stomach and small intestine. Food then enters your large intestine (colon) for further digestion, absorption of water and, finally, elimination of undigested food.
Compare and contrast trends in participation in sport and active leisure
The active leisure industry is a group of activities, events, and activities that combine fitness and outdoor activities. These activities are usually non-structured, non-competitive, and promote an active, healthy lifestyle.
Adult sports and activities include walking, fitness or gym, running or athletics, swimming, cycling, bushwalking, football or soccer, and yoga.
In today’s world, Physical Activity (PA) is no longer just a personal and individual choice; it is a social and political necessity. Its importance is recognized by public health authorities and governments around the world, which has led to an increase in PA activity (mainly due to the growing awareness of the negative health impacts of a lack of physical activity).
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Why is sunlight important to producers?
Answer:
Have a Nice and Wonderful day, evening, or night!!
Explanation:
Sunlight important to producers because plants need sunlight to produce Photosynthesis. Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.The plants use the sugar to make food for their selves.The producers need to eat plant to survive.
Hope this helps!! ;)
Which of the following is an indicator of good water quality? (2 points)
Answer→ Physico-chemical indicators
Explanation ≈ They include dissolved oxygen, pH, temperature, salinity and nutrients (nitrogen and phosphorus). They also include measures of toxicants such as insecticides, herbicides and metals.
Which of the statements below best describes the term evaporation?
A. Particles loose enough energy to break attractive forces to form a solid.
B. Particles loose enough energy to break attractive forces to form a gas.
C. Particles gain enough energy to break attractive forces to form a gas.
D. Particles gain enough energy to break attractive forces to form a liquid.