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3 years ago

Review the criteria used to distinguish between colonial and multicellular organisms. why is volvox not considered multicellular

2 answers:

6 0

The difference between a multicellular organism and a colonial organism is that colonial organism consists of individual one-celled organisms that can, if separated, survive on their own. On the other hand, cells from a multicellular life-form cannot live independently (they are all connected to function together).

Volvox is not considered multicellular because its cells are not aggregated into organized tissues and have no organ and organ systems.

lutik1710 [3]3 years ago

6 0

The difference between a multicellular organism and a colonial organism is that individual organisms from a colony can, if separated, survive on their own, while cells from a multicellular lifeform (e.g., cells from a brain) cannot.

Volvox is indeed multicellular because they are a bunch of unicells forming colonies. But they did not give rise to land plants. Another group called the charophytes did! They are green algae, multicellular and possessing some similarities to land plants. For example, they have sporopollenin on their walls.

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The emergency hormone released is adrenaline.

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2 years ago

A female is born with attached earlobes, which is a recessive phenotype. Which of the following statements about her parents mus

Igoryamba

Complete question:

A female is born with attached earlobes, which is a recessive phenotype. Which of the following statements about her parents must be true?

a. neither has the codominant allele.

b. Her father has an inactivated allele.

c. Both parents have the recessive allele.

d. Her mother carries the dominant allele.

Answer:

c. Both parents have the recessive allele.

Explanation:

A recessive trait is expressed in homozygous recessive genotypes only. If a female expresses the attached earlobe phenotype, she should be homozygous for the allele since the attached earlobe is a recessive trait. If allele "a" gives attached earlobe phenotype in homozygous genotype, the genotype of the female would be "aa". This means that the female has got one copy of the allele "a" from her either parents. Therefore, both her parents should have at least one copy of the recessive allele "a".

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3 years ago