Answer:
Longer, hope you pass
Explanation:
A population of mosquitoes is exposed to the pesticide DDT for several generations. At the end of that time, most individuals in the population are resistant to DDT. The most likely reason is that:
A. random mutations in each generation made mosquitoes resistant to DDT.
B. some individuals in the original population had the mutations that led to resistance.
C. DDT caused the mutations that led to resistance.
D. somatic mutations in the original population were passed on to subsequent generations.
E. by chance, new mutations that led to DDT resistance arose after DDT was used.
Answer:
B
Explanation:
A population of mosquitoes is exposed to the pesticide DDT for several generations. At the end of that time, most individuals in the population are resistant to DDT and the most likely reason is that some individuals in the original population had the mutations that led to resistance. Option B is correct.
What is mutation ?Mutation is the change in which there is slight change in the genome sequence of a DNA or RNA along with the gene. The mutation lead to various types to adaptations along with the diseases.
Resistance is the condition when the species on the multiple exposures develop certain kind of adaptations to it and these traits are sometime inherited sometimes not inherited.
Mutations are friendly as well where sometimes a disease causing mutation can be altered with the further mutation in it.
Therefore on the multiple exposure it led to condition of resistance in the species.
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30. Why was the paddlefish selected for study?
How can polyploidy cause speciation in plants?
Plants can sexually reproduce only when they are polyploid. Having the condition is normal in plants.
Plants can asexually reproduce or pollinate themselves. This allows polyploid individuals to reproduce.
Plants can repair polyploidy and obtain healthy cells. This allows plants to survive and reproduce.
Plants are not affected by polyploidy. Plants with the condition can reproduce normally.
Plants can asexually reproduce or pollinate themselves. This allows polyploid individuals to reproduce, this results develop cause speciation in plants, hence option B is correct.
What is polyploidy in plants?Polyploidy, which occurs when two or more genomes fuse within one nucleus, causes each cell to possess more than two pairs of homologous chromosomes.
Most angiosperms exhibit polyploidy, which is crucial for the survival of the agricultural crops on which people depend.
Three or more sets of homologous chromosomes are present in polyploid plants. These plants' increased chromosome count is the outcome of a genome duplication event.
Therefore, plants can asexually reproduce or pollinate themselves. This allows polyploid individuals to reproduce.
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Answer:
Plants can asexually reproduce or pollinate themselves. This allows polyploid individuals to reproduce.
Explanation:
I just did the workbook.
A(n)\ is an area of the planet that shaves similar conditions of climate, fauna (animal life), flora (plant life) and geography .
1.biome
2.environment
3.habitat
4.ecosystem
How did scientists determine how old the ocean floor is?
O A. Watching it grow
O B. Testing radioactive materials
O C. Asking other scientists
O D. Making a guess
Which of the following statements can be inferred using the above information? Bubble A. Cells can function equally as well at all pH's because enzymes are effective at all pH's. Bubble B. Cells only function within a specific temperature range because enzymes only function within a specific temperature range. Bubble C. Cells only function within a specific pH range because enzymes only function within a specific pH range. Bubble D. Cells can function equally as well at all temperatures because enzymes are effective at all temperatures.
Hello. Your question is incomplete. The complete question asks for the correct answer to be found based on Catalase is an essential enzyme in living beings since all cells need it.
Answer:
B. Cells only function within a specific temperature range because enzymes only function within a specific temperature range.
Explanation:
Catalase needs to be present in all cells of the living organism because it is responsible for the decomposition of hydrogen peroxide that cannot stay inside cells for long periods of time. Following this type of reasoning, we can say that it is necessary to maintain a constant temperature for the enzymes of an organism to function well because all enzymes have a specific temperature range, even catalase.
The specific temperature range determines that the enzymes will only work within that range. Therefore, an environment where the temperature is below or above that specific range, can prevent the enzyme from functioning and even cause irreversible damage to the enzyme.
A student drew models of an electromagnetic wave and a water wave. Which scientific question did the student MOST LIKELY ask to know how to draw these models? A. Do water waves travel at a slower speed than electromagnetic waves ? B. Can water waves and electromagnetic waves travel through different media? C. How do water waves and electromagnetic waves increase their amplitude ? D. Are water waves and electromagnetic waves examples of transverse waves ?
Answer:
answer is c
Explanation:
etc
In which substances can the electrons move randomly?
Answer:
Conductors
Explanation: the substances which have a large number of free electrons and offer a low resistance are called conductors
PLSS HELP IMMEDIATELY!!!! ILL MARK BRAINIEST IF U DONT GUESS OR LEAVE LINKS
!!!!!
Answer:
stems
Explanation:
Answer:
I'm pretty sure it is seeds bc they make plants and eggs make baby lizards
For this structural characteristic, decide if it is a characteristic of DNA , a characteristic of RNA , a characteristic of both DNA and RNA , or a characteristic of neither DNA nor RNA .
It contains thymine as a base.
What determines the temperature of a layer of the atmosphere
Answer:
How far down the layer is
Explanation:
yeah
Based on the phylogenetic tree, identify approximately how many millions of years ago the earliest south Asian river dolphin evolved
my guess is that it is 130 Million
explain Darwin's theory of natural selection
Answer:
More individuals are produced each generation that can survive. Phenotypic variation exists among individuals and the variation is heritable. Those individuals with heritable traits better suited to the environment will survive.
Explanation:
More individuals are produced each generation that can survive. Phenotypic variation exists among individuals and the variation is heritable. Those individuals with heritable traits better suited to the environment will survive.
match the following structures on the diagram.
im confused on this some how.
Answer:
A-chromatin B-chromosome c-chromatic d-nuclear membrane e-spindle f-centriole
Morning glories are flowering vines that will climb up a trellis or other support by wrapping tendrils around it. What kind of tropism causes the morning glories to twine around the support this way?
A. phototropism, because the light pulls the morning glories upwards
B. gravitropism, because gravity helps the morning glories orient themselves in space
C. thigmotropism, because the morning glories twine around the support when they touch it
D. nutrotropism, because the curliness of the morning glories depends on the nutrients in the soil
PLEASE help me and quick
Explanation:
pretty sure its c also nice pfp 0_0
Please help with the question below! FAST!
Answer:
The first answer choice '3'
Explanation:
Answer:
A, the first one which states that they will grow in proportion.
Explanation:
Natural selection would favor larger blood vessels, as shown by more babies birthed by mothers with big vessels surviving than those with smaller. Hope it helps :)
In commensalistic relationships one organism benefits and the other organism.....
A. is harmed
B. are neither helped nor harmed (are unaffected)
C. is also benefited
Answer:
B
Explanation:
Because that what commensalism is
Answer:
B. are neither helped nor harmed (are unaffected)
Explanation:
Hope this helps
Assume that sound A has a decibel level of 10 and sound B has a decibel level of 30. How many times louder is sound B than sound A?
Answer:
3 times louder
Explanation:
10x3=30
If sound A has a decibel level of 10 and sound B has a decibel level of 30 then its a thrice time louder.
What is sound and types of sound?There are two types of sound:
Audible and Inaudible.Inaudible sounds are sounds that the human ear cannot detect.
Whereas human ear hears frequencies between 20 Hz and 20 KHz.
Thus, its a thrice time louder.
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Complete the following sentence.
To reduce the chances of resistant insects evolving from overexposure to BT-modified crops, farmers producing these crops are required to also plant ________varieties of the same crops.
unmodified
To reduce the chances of resistant insects evolving from overexposure to BT-modified crops, farmers producing these crops are required to also plant ________varieties of the same crops.
what is the atomic number of this atom?
Answer:
6
Explanation:
The atomic number should be 6. Atomic number is determined by how many protons are in an atoms. In the diagram, 6 protons are shown in the nucleus.
What does nCoV stand for ?
Answer:
nCoV is often used to indicate a newly recognized coronavirus prior to definitive identification and classification. It is sometimes used in combination with the year of identification.
Explanation:
I NEED IT NOWWW ASAP PLEASEE ITS A TEST
Plants with dark brown stems mated to ones with light colored stems: All offspring have a medium brown color.
C. Incomplete dominance
D. Polygenic
E. X-linked gene
B. Codominance
A.Dominant/recessive gene
Answer: could be Polygenic whish you the best in your test i had to take my test at home while everyone at school does it
Which best matches objects that a scientist would include on a list describing a forest ecosystem?
different types of animals and plants and the forest soil
O one animal species, the soil, water, and nutrients
o hall the living things in the forest ecosystem
O different types of soil, rocks, and water sources in the forest
Answer:
all the living things in the forest ecosystem
substance in which the monomer is a nucleotide _______
A - Carbohydrates
B - Nucleic Acids
C - Proteins
D - Fats
Nucleic acid is a substance in which the monomer is a nucleotide. Therefore, option B is correct.
What are nucleic acids?Biopolymers and macromolecules called nucleic acids are important for all known forms of life. They are constructed of monomers called nucleotides, which are composed of a nitrogenous base (adenine, guanine, thymine, uracil, and cytosine), a phosphate group, and a 5-carbon sugar.
The components that make up an individual's genetic code are nucleic acids. Deoxyribonucleic acid (DNA) and ribonucleic acid are the principal two examples of nucleic acids (RNA). They have an important role in heredity and protein synthesis.
Thus, A nucleotide serves as the monomer of a material known as nucleic acid. Therefore, option B is correct.
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1. According to the rules of carbon dating, how much time
passes during one half-life?
Answer:
5,730 yearsExplanation:5,730 years
1. Explain the contributions of Nicholaus Steno to geology.
which feature of a human is controlled by genes only
Which of these is an individual effort for saving a habitat? Select all that apply.
A. using fertilizers always
B. establishing more open spaces
C. using too many chemicals
D. establishing new regulations
E. using less fuels
Answer:
B, D and E
Explanation:
according to the dichotomous key organism 3 is a
A) leech
B) bristle worm
C) water scorpion
D) dragonfly nymph
Answer
The correct answer is A) leech
Explanation:
According to the dichotomous key organism 3 is a leech. Therefore, option (A) is correct.
What is a dichotomous key?A dichotomous key is a tool used by biologists to identify organisms based on their characteristics. It consists of a series of questions with two possible answers for each question. By following the path of the key, the user can narrow down the possible identities of the organism until a final identification is reached.
Dichotomous keys are often used to identify species in fieldwork and can be based on physical characteristics such as color, size, and shape, or other traits such as behavior, habitat, and geographic range. These keys provide an efficient way to identify organisms and are widely used in fields such as ecology, botany, and zoology. However, the accuracy of a dichotomous key depends on the quality and specificity of the questions used and the expertise of the user in interpreting the results.
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Please help, any unnecessary answers will be reported. Thanks :)
Answer:
The one all the way over to the left, the dark blue one. I hope this helps!
Explanation:
Answer: first one
Explanation: The brain uses the nerves to tell the muscles when to move. The nerves also deliver information on what to do in a fight or flight case