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4 years ago

11

on October 6, both fin and humpback whales were heard in the same area at 1:30 am and at 2:30 am why do you think both species m

ight have made noises at the same time.

1 answer:

MatroZZZ [7]4 years ago

7 0

Answer: They were most likely communicating with each other.

Explanation:When whales communicate they make sounds .This is called ecolocation

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What are the roles of producers consumers and decomposers in an ecosystem

mariarad [96]

Answer: The producers refers to green plants that carry out the process of photosynthesis in order to produce food for themselves and others. The principal function of producers is to manufacture food for themselves and all other living organisms.

The consumers refers to those living organisms that can not produce their own food and have to depend on the food produce by others. Consumers can be categorized into primary, secondary and tertiary consumers depending on where they are located on the trophic levels. They can also be classified as herbivores, carnivores and omnivores depending on the type of food they eat. The major function of consumers is transference of energy. Consumers transfer the energy they obtain from the food they eat to those animals that feed on them.

The decomposers are those micro organisms that are majorly found in soils.The principal function of decomposers is to break down dead organic matters so that they can be absorbed by the roots of plants. The broken down organic substances serve as nutrients, which the plants used to grow and develop.

These three types of organisms work together in the ecosystem to maintain the balance of the ecosystem.

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3 years ago

Moving substances from a lower concentration to a higher concentration requires _____. a. passive diffusion b. facilitated diffu

slavikrds [6]

C. It requires active transport because the use of energy is necessary, the natural and opposite flow to this, would be from high to low concentration that requires little to no energy (i.e passive diffusion).

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3 years ago

Nucleic acid segments and are nucleic acids that can store biological information based on the sequence of their nucleotide mono

aleksklad [387]

Full Question (figure attached):

Nucleic acid segments and ar

DNA and RNA are nucleic acids that can store biological information based on the sequence of their nucleotide monomers. Figure 1 shows a short segment of each of the two types of nucleic acids. Which of the following best describes a structural difference between DNA and RNA?

A. DNA contains four types of nitrogenous bases, whereas RNA contains only two types of nitrogenous bases

B. The backbone of DNA contains deoxyibose, whereas the backbon e of RNA contains ribose.

C. A DNA molecule is composed of two parallel strands with the same 5'-3' directionality, whereas an RNA molecule is composed of only one strand

D. Phosphate groups provide rigidity to DNA, but RNA is flexible and contains no phosphate groups

Answer:

B. The backbone of DNA contains deoxyibose, whereas the backbon e of RNA contains ribose.

Explanation:

A. DNA contains four types of nitrogenous bases, whereas RNA contains only two types of nitrogenous bases - this is false. Both contain four types of nitrogenous bases. DNA contains cytosine, guanine, adenosine and thymine, whereas RNA contains cytosine, guanine, adenine, and uracil.

B. The backbone of DNA contains deoxyibose, whereas the backbon e of RNA contains ribose. - this is true, each nucleotide in DNA contains a deoxyribose sugar, whereas each nucleotide in RNA contains a ribose sugar

C. A DNA molecule is composed of two parallel strands with the same 5'-3' directionality, whereas an RNA molecule is composed of only one strand - this is false. DNA is composed of 2 strands, and RNA is composed of one, but the DNA strands run in an anti-parallel configuration (one runs 5'-3', the other runs 3'-5')

D. Phosphate groups provide rigidity to DNA, but RNA is flexible and contains no phosphate groups - this is false, both DNA and RNA nucleotides contain phosphate groups

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3 years ago

Which of the following is true about the relationship between honeybees and flowering plants

disa [49]

It is a mutualistic relationship. The flowers need the bees to pollinate, while the bees need the pollen to make food.

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3 years ago

A medical researcher is exploring treatments for a rare disease. Since the disease is not common, she has only been able to loca

a_sh-v [17]

Let's go through each of our options.

For A, the rarity of something has no effect on its validity.

For B, the study wouldn't be more valid, as you should only be testing one variable at a time (in the case, the medicine).

For C, nothing in your experiments should ever be random. And if I'm correctly interpreting it, the question means that even patients who aren't sick would be receiving the treatment, which serves no purpose at all.

Therefore, we know that D must be the correct answer, via process of elimination. Smaller sample sizes are not ideal for experiments, as they require a great deal of extrapolation to see more specific results on a larger scale.

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3 years ago