Which of the following statements about insects is false? a. Insects have both dorsal and ventral blood vessels. b. Insects have spiracles, openings that allow air to enter. c. The trachea is part of the digestive system. d. Insects have a developed digestive system with a mouth, crop, and intestine.
Answers
The false statement among the given options is c.The trachea is part of the digestive system.
Insects are a class of invertebrates within the arthropod phylum that have a chitinous exoskeleton, a three-part body, three pairs of jointed legs, compound eyes, and one pair of antennae. They are the most diverse group of animals on the planet, comprising more than a million known species. Insects are one of the most widely distributed groups of animals on the planet, occupying nearly every habitat, including freshwater, forests, grasslands, deserts, and human-modified environments.The false statement about insects is c. The trachea is part of the digestive system. The trachea is a respiratory organ in insects that transports oxygen to the body cells. It consists of a system of tubes that run throughout the insect's body, branching into smaller and smaller tubes called tracheoles, which reach every cell in the body. Insects breathe through spiracles, openings that allow air to enter. The tracheal system delivers oxygen directly to the cells that require it, eliminating the need for a circulatory system. The digestive system of insects includes a mouth, crop, and intestine. The mouthparts of insects are modified to suit their feeding habits. The crop serves as a storage compartment, while the intestine is responsible for digesting and absorbing food. Hence, option c is the false statement among the given options. In summary, insects are diverse animals that occupy various habitats, have a developed digestive system with a mouth, crop, and intestine. They have spiracles, openings that allow air to enter, and use a tracheal system to transport oxygen.
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Related Questions
when do birds use their teeth????
Answers
Answer:
to eat worms
Explanation:
Answer:
Birds do not have teeth, however...Explanation:
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According to The Cornell Lab, "Birds do not have teeth, however, they may have ridges on their bills that help them grip food, but this does not count as teeth. So what about birds that have “tooth” in their name, like Double-toothed Kite? Some birds of prey have a sharp ridge or “tomial tooth” on the bill that they use to bite into their prey when subduing it. But these modifications to the bill surface are not considered the same thing as individualized teeth seen in other animals."
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Hope this helps! <3
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1. Write a hypothesis describing what you believe
may be causing the heavy growth of algae in the
pond. Base your hypothesis on your observations
of the two ponds.
Answers
Answer:
The hypothesis is ''the higher population of algae in a pond has a direct relation on the higher concentration of nutrients in the pond''
Explanation:
''The higher population of algae in a pond has a direct relation on the higher concentration of nutrients in the pond''. The population of algae increases vigorously when there is high concentration of nutrients such as nitrogen and phosphorus in the pond. So if there are two ponds having different concentration of nutrients so the population of algae will be higher in that pond where nutrients are present in high amount.
My hypothesis about the heavy growth of algae in the pond is "The growth of algae in the pond is caused by fertilizers and urban runoff entering the pond"
A hypothesis is a plausible explanation of some question of the real world that can be tested (either confirmed or rejected) by using the scientific method.The scientific method is a process that involves making experiments and/or observations to compile data capable of supporting the working hypothesis.In this case, it is possible to test my working hypothesis by measuring the concentration of nutrients (i.e., compounds rich in nitrogenous and phosphorous) associated with fertilizers and urban runoff in the pond that underwent a significant growth of algae and then statistically compare the nutrient level with those observed in ponds free of fertilizers and urban runoff.
In conclusion, a plausible explanation (i.e., a hypothesis) about the heavy growth of algae in the pond may be "The growth of algae in the pond is caused by fertilizers and urban runoff entering the pond"
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horizontal gene transfer can occur through several mechanisms. why is this relevant to humans
Answers
Answer:
Explanation:
Horizontal gene transfer helps in acquiring relevant gene that are not present in cell but are beneficial.
If a gene is lost in the cell, through gene transfer it can be regain and the various adverse effect caused through the absence of the gene can be reversed.
It also help in treatment of various disease such as cancer by introducing into the body non cancerous cells and prevent the spread of cancerous cells .
Answer:
Explanation:
Penn foster
Freckles are recessive. no freckles are dominant. mom heterozygous dad homozygous recessive. possible out come for kids?
Answers
The possible outcome for the kids in this scenario is that they will all have freckles. Let me explain why.
When it comes to freckles, the trait for having freckles is recessive, meaning that it is masked or hidden when the dominant trait (no freckles) is present. In this case, the mom is heterozygous, meaning she has one copy of the freckles gene and one copy of the no freckles gene. The dad, on the other hand, is homozygous recessive, meaning he has two copies of the freckles gene.
Since freckles is a recessive trait, in order for a child to have freckles, they must inherit two copies of the freckles gene - one from each parent. In this scenario, all of the possible outcomes for the kids will be that they inherit one copy of the freckles gene from the mom and one copy from the dad, resulting in them having freckles.
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1. You are planning to perform PCR using primers that you have designed. You resuspended the primers at a stock concentration of 100 µM. The PCR reaction will have a final volume of 50 µL and the final concentration of each primer should be 0.2 µM. Explain how you would achieve this concentration
2. We are going to be using a number of buffers this semester for our work with the frogs. Most of these are generated at a 10X stock concentration. I will give you a stock to work on preparing at the end of this class
Answers
1. To achieve a final concentration of 0.2 µM for each primer in a 50 µL PCR reaction using primers that were resuspended at a stock concentration of 100 µM, you will need to dilute the primers further.
The dilution factor required can be calculated using the following equation:
Dilution Factor = Final Concentration / Stock ConcentrationDilution Factor = 0.2 µM / 100 µM = 0.002Therefore, the primers should be diluted 0.002-fold. To achieve this dilution, you can take 1 µL of the primer stock solution and add it to 499 µL of water or buffer. This will give you a final concentration of 0.2 µM for each primer in a 50 µL PCR reaction.2. To prepare a 10X stock solution of a buffer, you will need to dissolve the appropriate amount of the buffer in water or another solvent to make a solution that is 10 times more concentrated than the final working concentration. For example, if you need to prepare 100 mL of a 1X buffer solution, you would need to dissolve enough buffer to make a 10X stock solution that is 10 times more concentrated than the final solution.
To make a 10X stock solution, you can follow these steps:
1. Calculate the amount of buffer required to make the final solution. For example, if you need to prepare 100 mL of a 1X buffer solution and the buffer is provided as a powder, you may need to weigh out a certain amount of the powder to make the final solution.2. Add the calculated amount of buffer to a small amount of water or solvent to make a concentrated stock solution. For example, if you need to prepare 100 mL of a 1X buffer solution and the buffer is provided as a powder, you may need to dissolve the powder in 10 mL of water or solvent to make a 10X stock solution.3. Add water or solvent to the concentrated stock solution to make a final volume that is 10 times greater than the final working volume. For example, if you need to prepare 100 mL of a 1X buffer solution, you would need to add 90 mL of water or solvent to the 10 mL of 10X stock solution you prepared in step 2.About PrimersIn the PCR process, the primers functions as a barrier to the target DNA fragment to be amplified and simultaneously provides a hydroxy group (-OH) at the 3' end needed for the process of DNA existence. The primer design needed for PCR is a pair of primers known as forward primers and reverse primer. A good primer is a primer that meets the criteria for primary parameters. These parameters include melting temperature (Tm), percentage of G and C (%GC), 3'dimer, stability, repeats, and hairpins. good (Sulistyaningsih, 2007). Primers with Tm that are too high can result in low PCR products.
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Which of these are examples of how bacteria are beneficial? (Select all that apply.)
1. They can cause disease.
2. They help us digest food.
3. They are used to add flavor to some foods.
4. They change milk into cheese.
Answers
Answer:
The bacteria in our bodies help degrade the food we eat, help make nutrients available to us and neutralize toxins, to name a few examples[8]; [9]; [10]. Also, the microbiota play an essential role in the defense against infections by protecting the colonized surfaces from invading pathogens.
Explanation:
hope this helps
1. They can cause disease.
2. They help us digest food.
3. They are used to add flavor to some foods.
4. They change milk into cheese.
Explanation:
answers.
2
3
4
Answer fast pleAse i really need the help
Answers
Answer:
Due to different reproduction methods.
Explanation:
Organisms from eubacteria, plantae and animal kingdom are used different reproductive strategies which leads to genetic diversity. Bacteria use asexual reproduction which produces identical offspring while on the other hand, plants and animals use sexual reproduction that produces offspring that is different from plants which leads to variation in the organism so that's why we can say that different reproductive strategies is responsible for genetic diversity.
Whats TWO Answer Giving Brainliest To first Correct AnSwEr:D......... could it be D or C or C or B
Answers
Answer:
I'd think the Answer is A since usually people die from dehydration or a stroke. A or B in my opinion.
Explanation:
Question 2 of 10
DNA isolated from water samples collected in six different sites was
prepared and analyzed by gel electrophoresis for the presence of carp. The
resulting gel is shown. Lanes 1 through 6 contain the DNA from each site.
Lanes 7 and 8 represent the negative and positive controls.
123456ZS
Based on the banding patterns, how many sites tested positive for carp?
← PREVIOUS
Please help
Answers
Answer:
lane 7 indicate negative control and 8 contains positive control.lane 1,3,5,6 corresponds ban in the lane 8.it is said that total 4 sites tested positive for carp
Explanation:
What is true about the role of organelles?
Choose 1 answer:
(A) all organelles release usable forms of energy.
(B) each organelle carries out a specific function for the cell.
(C) all organelles help the cell hold its shape.
Answers
Answer:
answer b on khan academy Each organelle performs a different job in the cell.
Explanation:
Each organelle has a job in the cell, such as making or storing energy, or containing genetic information.
umbilical cord blood is promoted as a rich source of multipotent stem cells for autologous (self) transplants. can you see a problem with the use of baby's cord blood to treat a disease in that child at a later date?
Answers
There are also ethical concerns surrounding the use of cord blood as a medical treatment, as some people believe that it is wrong to use stem cells from a baby in this way.
The use of a baby's cord blood to treat a disease at a later date can create a problem as it has several limitations. Some of these limitations include limited availability, high cost, and the need for a perfect match to the HLA of the recipient. Additionally, cord blood stem cells also have a lower stem cell count than bone marrow, which can make it difficult to transplant them into an adult patient. Moreover, there are other ethical concerns related to the use of cord blood as a medical treatment. One problem with using cord blood is that it contains a limited number of stem cells, which makes it less effective than other treatments. Furthermore, the costs associated with collecting, storing, and processing cord blood stem cells are often quite high, which can make it difficult for families to access this treatment option. Additionally, since cord blood stem cells must match the HLA of the recipient, it may be difficult to find a donor who is a perfect match.
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____ spermatogonia divide through meiosis to create _____ spermatids with ____ chromosomes each
Haploid; 2; 46
Diploid; 4; 23
Diploid; 4; 46
Haploid; 2; 23
Answers
Answer:b
Explanation:
Diploid spermatogonia divide through meiosis to create 4 spermatids with chromosomes 23 each, which is option B, as during spermatogenesis, diploid spermatogonia divide through mitosis to produce primary spermatocytes, which then undergo meiosis I to produce two haploid secondary spermatocytes.
What is cell division?Spermatogenesis is the process by which diploid spermatogonia (sperm stem cells) divide and differentiate into mature haploid sperm cells. The process of spermatogenesis takes place in the seminiferous tubules of the testes. During the first stage of spermatogenesis, the diploid spermatogonia divide through mitosis to produce primary spermatocytes. Each primary spermatocyte then undergoes meiosis I to produce two haploid secondary spermatocytes. These secondary spermatocytes then undergo meiosis II to produce four haploid spermatids. The spermatids then differentiate into mature sperm cells through a process called spermiogenesis.
Hence, diploid spermatogonia divide through meiosis to create 4 spermatids with chromosomes 23 each, which is option B, as during spermatogenesis, diploid spermatogonia divide through mitosis to produce primary spermatocytes, which then undergo meiosis I to produce two haploid secondary spermatocytes.
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What are the 6 levels of organization of the human body?
Answers
Answer:
These include the chemical, cellular, tissue, organ, organ system, and the organism level
Explanation:
Correct me if im wrong
who establishes a crime scene?
A) Criminal Investigator
B) First Responder
C) District Attorney
D) Crime scene Photographer
Answers
Answer:
Explanation:
Law enforcement establishes a crime scene of what happened.
Please help me this is my last question.
You guys can do 1 sentence.
Thank you :)
Answers
if the shoreline is eroding due to pollution or construction the weather becomes more dangerous because there are less plant & wildlife to slow ot down
Types of coordination their examples and differences???
Answers
Answer:
Hey there!
The coordination system tells the body how to respond to a stimulus. There are two types of coordination systems, the nervous and endocrine systems, which help humans react to situations. The endocrine system using chemical signaling, while the nervous system uses electrical signaling.
Let me know if this helps :)
The model below shows the mRNA sequence
AUG GGG UUU ACA UAG
Use the genetic code table to predict what amino
acids will be in the protein when this mRNA is
translated.
Answers
Answer:
AUG is MET (starting point)
GGG is GLY
UUU is PHE
ACA is THR
and lastly
UAG is stop (there's no code for this one so you stop)
Explanation:
I hope this the right answers for you.
explain why a transparent epidermis is an adaptation for photosynthesis
Answers
Answer: A leaf’s upper epidermis is generally transparent that allowing the light to enter the leaf.
Where are electrons found in Atoms
Answers
Answer:
Explanation:
The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged). Atoms have different properties based on the arrangement and number of their basic particles.
Explanation:
Issun Shingeki... Messatsu!
In short, electrons are the negative charge in Atoms.
(URGENT)How do solutes affect tonicity?
Answers
You have hypotonic which is a solution with a lot of water and little solutes that would rush into cells causing swelling and lysis then you isotonic 0.9saline which is the same amount of balance as your body has no change
if further studies revealed that 150 of the beetles were homozygous dominant, is the population at equilibrium? explain using the chi-square test.
Answers
If further studies revealed that 150 of the beetles were homozygous dominant, the population is not at equilibrium. This can be explained using the chi-square test, which compares observed and expected frequencies to determine if there is a significant deviation.
To assess whether a population is at equilibrium, the observed frequencies of different genotypes are compared to the expected frequencies based on the principles of Hardy-Weinberg equilibrium. The chi-square test is commonly used for this analysis. If the observed frequencies significantly deviate from the expected frequencies, it indicates that the population is not at equilibrium.
In this case, if the observed frequency of homozygous dominant beetles is 150, it needs to be compared to the expected frequency based on the allele frequencies in the population. If there is a significant difference between the observed and expected frequencies, it suggests that evolutionary forces, such as genetic drift, mutation, selection, or migration, may be affecting the population, leading to a deviation from equilibrium.
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Complete the chemical formula for this substance: H+ + H2O -------->
1. H2O+
2. Ho3+
3. h+
4. h3o+
will mark branliest!!
Answers
Answer:
H2+OH observe and see it correctly
In the Gizmo, what light intensity and CO2 level do you think will maximize the rate of photosynthesis? (adjust the slider bars to determine this)
Answers
Answer:
Higher.
Explanation:
Higher light intensity as well as higher concentration of carbondioxide gas will increases the rate of photosynthesis because high light intensity allows the entering of carbondioxide gas inside the leaves through opening of stomata whereas carbondioxide gas is the reactant in the process of photosynthesis. If there are more reactants available so more food is produced in the form of glucose during the process of photosynthesis so we can conclude that high light intensity and carbondioxide levels increases the rate of photosynthesis.
Circle the chromosomal abnormality shown on this karyotype.
Answers
Karyotypes can provide information about chromosomal abnormalities such as non-disjunction. The exposed karyotype belongs to a person who suffers from Turner syndrome, in which one of the X chromosomes is missing.
What is non-disjunction?
Non-disjunction is the proper separation failure of chromosomes during anaphase I or II of the meiotic division.
This mistake in segregation results in the production of abnormal gametes containing a greater or lesser number of chromosomes than is found in a normal cell. Consequently, the individual may develop a trisomy or monosomy.
Non-disjunction is a cause of various abnormal medical conditions, including Down syndrome and Turner syndrome.
The Turner syndrome is the monosomy in the X-chromosome (X-1).
The exposed karyotype belongs to a person with the Turner syndrome. We can see only one X chromosome, while the other one is missing.
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Defining Diseases Use the drop-down menus to complete each sentence. occurs when the immune system attacks the body. is often caused by obesity resulting from overeating and poor nutrition. is caused by DNA changes in a single gene and affects the nerve cells in the brain. is caused by uncontrolled cell growth. occurs when the pancreas does not produce enough insulin, or the body does not respond properly to it.
Answers
Answer:
1. Lupus
2. Cardiovascular disease
3. Huntington disease
4. Cancer
5. Diabetes
Explanation:
A disease can be defined as any harmful or abnormal deviation of the body of a living organism from its functional state or normal structure, which is typically accompanied by certain signs and symptoms.
Basically, a disease negatively affects the function or structure of the body of a living organism.
The different types of diseases experienced by living organisms include the following;
1. Lupus: occurs when the immune system attacks the body. It is referred to as an autoimmune disease.
2. Cardiovascular disease: is often caused by obesity resulting from overeating and poor nutrition.
3. Huntington disease: is caused by DNA changes in a single gene and affects the nerve cells in the brain.
4. Cancer: is caused by uncontrolled cell growth.
5. Diabetes: occurs when the pancreas does not produce enough insulin, or the body does not respond properly to it.
Which is a sustainable practice?
O operating wind farms
O clear cutting
O flood irrigation
O overfishing
Answers
Answer:
Operating wind farms
Explanation:
Sustainable practices are practices that can be continued or practices that maintain a condition without harming the environment. Operating wind farms doesn't harm the enviornment that much, and there is always going to be wind.
Operating wind farms is considered as a sustainable practice. Thus, option A is correct.
What are Sustainable practices?Sustainable practices are the practices that could be continued or the practices that used to maintain the condition without harming the environment. Operating wind farms does not cause harm to the environment that is much, and there has been always going to be wind.
Sustainability has usually presumes that the available resources are the present in finite amount, and it should be used conservatively as well as wisely with the view to have the long-term priorities and the consequences of the ways in which the available resources are used.
Therefore, Wind power or the wind farms were one of the most efficient technology that produce energy in the very safe and the environmentally sustainable manner.
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If two species have many amino acid differences, are they closely or distantly related? Explain how scientists know this.
Answers
Further understanding: if you look at identical twins, they are closely related to each other because they have almost the same DNA, which will code for the same amino acids, which will lead to the same phenotype or appearance.
To summarize, the greater the amino acid differences the less related they are and vice versa
Hope that helps
Where in your body do you think cell division is occurring?
Answers
Answer:
Everywhere except in gonad cellsExplanation:
Cell division by mitosis occurs in all human body cells except the gonads (sex cells). During mitosis, the DNA is exactly copied and a new daughter cell created with the same number of chromosomes as the parent cell, ie 46. In the sex cells, meiosis occurs where the DNA is halved and the daughter cell has only 23 chromosomes.
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Answer: in shoot and root tips
Glycolysis is the first step in cellular respiration. which option best summarizes the process?
Answers
Answer:
Anaerobic process that occurs in the cytoplasm. The process uses 2 ATP molecules. 6 carbon molecules are broken down into 3 pyruvate molecules during the process
Explanation:
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In the equation 6x – 2 = –4x + 2, Spencer claims that the first step is to add 4x to both sides. Jeremiah claims that the first step is to subtract 6x from both sides. Who is correct? Explain
Answers
In the equation 6x - 2 = -4x + 2, Jeremiah is correct in his claim that the first step is to subtract 6x from both sides.
Solving algebraic equationsTo solve the equation, the goal is to isolate the variable 'x' on one side of the equation. To do this, we need to eliminate the x-terms on one side.
If Spencer were to add 4x to both sides, the equation would become:
6x - 2 + 4x = -4x + 2 + 4x
Combining like terms, we would have:
10x - 2 = 2
However, subtracting 6x from both sides, as Jeremiah suggests, would give us:
6x - 6x - 2 = -4x - 6x + 2
To simplify, we have:
-2 = -10x + 2
Now, we can proceed with solving the equation by manipulating and simplifying further. But in terms of the first step, Jeremiah's approach of subtracting 6x from both sides is the correct choice to eliminate the x-terms on one side of the equation.
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