explain the role of the digestive system, the respiratory system and the urinary system in the removal of waste. how do these waste products relate to the 3 core resources?

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Answer 1

Answer: The function of the digestive system is digestion and absorption.Digestion is the breakdown of food into small molecules, which are then absorbed into the body. The digestive system is divided into two major parts: The digestive tract (alimentary canal) is a continuous tube with two openings: the mouth and the anus.

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You are a virologist interested in studying the evolution of viral genomes. You are studying two newly isolated viral strains and have sequenced their genomes. You find that the genome of strain 1 contains 25% A, 55% G, 20% C, and 10% T. You report that you have isolated a virus with a single-stranded DNA genome. Based on what evidence can you make this conclusion

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Answer:

See the answer below

Explanation:

In double-stranded DNA, the ratio of purine bases (Adenine and Guanine) and that of pyrimidine bases (Thymine and Cytosine) is 1:1 according to Chargaff's rule. This means that the percentage of Adenine must be equal to that of Guanine while that of Thymine must also be equal to Cytosine.

However, in the case of the newly isolated viral strain, the amount of Adenine (25%) and Guanine (55%) vary while that of Thymine (10%) and Cytosine (20%) also vary. This is in contrast to Chargaff's rule. Hence, the isolated virus is a single-stranded DNA virus instead of a double-stranded.

Mendel crossed two plants that were heterozygous for purple flower color. Which genotypes could he have used to represent the cross? PP ´ PP Pp ´ Pp pp ´ pp Pp ´ PP

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The answer is Pp Pp.

If we imagine that plant has two alleles for the trait and if P represents dominant allele, and p represents recessive allele, then genotypes are:
PP - dominant homozygous, which contains both dominant alleles
pp - recessive homozygous, which contains both recessive alleles
Pp - heterozygous, which contains both dominant and recessive alleles

The answer would be B. Pp'Pp.

Which of the following occurs in the upper respiratory system? A)air enters the alveoli
B)air enters the bloodstream
C)air is filtered and moistened
D)air is delivered to muscles

Answers

The correct answer is Option C

The air enters the nasal cavity and it is filtered and moistened their. This is done by the mucous membrane that is present on the inner side of the nasal passage.

The air is filtered and the dust particles gets attached to the mucous and the filtered air is send inside for the exchange of gases.

c.............................

Tree-living mammals have a variety of different specializations for moving in trees, including a. very long arms for swinging from tree to tree. b. sticky pads on their arms and legs that help them cling to tree trunks and branches. c. a prehensile tail used for climbing and hanging from branches. d. all of the above.

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i think it is d or it would be all of them apart from c

What characteristic of amphibians necessitates that they live near water?

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they are mostly habittated to watter because they requres oxygen more from water or there organ setup to do it works properly under water.

What is the differences between mitosis and meiosis and explain why there is meiosis 1 and 2 in cell division but this is not happening with mitosis

Answers

Answer:

Explanation:

Cells divide and reproduce in two ways, mitosis and meiosis.

Mitosis results in two identical daughter cells, whereas meiosis results in four cells.

Keys differences and similarities between the two types of cell division.

Mitosis Meiosis

cells created: two daughter cells four daughter cells

Ploidy Creates diploid daughter cells Creates haploid daughter cells

Genetics Daughter cells are Daughter cells are . . genetically identical genetically different

Why is there a meiosis II but not mitosis II?

Meiosis II is generally regarded as being very similar to mitosis, except for the presence of two parent cells, instead of only one. In both meiosis I and II, cytokinesis occurs, and there are two daughter cells per parent cell.

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