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zheka24 [161]
3 years ago
8

Mammals in Australia are called marsupials, and diverged from the placental mammals very early in mammalian evolution. Australia

n sugar gliders and North American flying squirrels (see picture) have membranes of skin between their forelimbs and hindlimbs that allow them to glide between tree branches. Are their membranes homologous or analogous?
Biology
1 answer:
mamaluj [8]3 years ago
7 0

Answer:

The correct answer is homologous.

Explanation:

A structure that is derived from a common ancestor is called homologous structure. So homologous structure is the characteristic of divergent evolution that means divergent evolution give rise to homologous structures.

So as the marsupials are mammals that were diverged from placental mammals very early in mammalian evolution, the membranes of skin that allow Australian sugar gliders and North American flying squirrels to glide are homologous because divergent evolution gives rise to homologous structures.

The function of these homologous structures can be the same or can be different. Therefore the correct answer is their membrane are homologous.

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Cell walls are supporting structures that help the plant to have a fixed shape and protect it from injury. Other than that, it helps to keep the plant turgid so that it can stay firm and upright. Because when it enters a high water potential solution, as water moves in, the water exerts turgor pressure on the cell wall and the cell wall thus exerts an opposing pressure to keep water out. Hence cell wall is needed for the plant.

On the other hand, animal cells do not need to keep the structures, as they have the skeletal system to protect the organs and cushion them against any
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I hope that helped
5 0
3 years ago
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A cell membrane is a phospholipid bilayer.
nirvana33 [79]

Answer:

b. The surfaces of the membrane are nonpermeable.

Explanation:

This helps the cell membrane to protect the cell.

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2 years ago
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Which of the following is not a characteristic of life?
valentinak56 [21]

Answer:

Change their external environment is the correct answer.

6 0
2 years ago
3. What are some examples of fluctuations in abiotic cycles?​
ipn [44]

Answer:

1.The carbon cycle.

2.The nitrogen cycle.

3.The water cycle.

4.The sulfur cycle.

5.The phosphorus cycle.

6.The rock cycle.

Explanation:

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4 0
2 years ago
When RNA is processed in the nucleus and made ready for transfer out into the cytoplasm for protein synthesis, which of the foll
IRISSAK [1]
Answer:
Letter E - exons are cut from the strand and removed

Explanation:

Letter A and B are incorrect because the poly-A tail and guanine cap are added to the 3’ and 5’ end respectively. They aid in translation of the mRNA, while serving as protection. The poly-A tail is repeated adenine nucleotides, while the guanine cap is a modified guanine nucleotide.

Letter C is incorrect because alternative splicing is one mechanism for generating variation, and is thought to be one of the reasons for why humans have smaller genomes than other organisms and still maintain high complexity. Alternative splicing is incredibly important because it produces more than one transcript from a pre-mRNA.

Letter D is incorrect because introns are the non coding portions of the mRNA. They are excised to make a smaller mRNA transcript, and one that contains all the protein genes.

This letter E is the correct answer, because exons are the coding portions of the mRNA, and are not excised during RNA processing.

Hope that helped! If I made a mistake, please let me know.
8 0
3 years ago
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