According to the theory of evolution, what characteristics do all living organisms share suggesting that all life-forms on earth arose from a single ancestor?a. they share a common organic chemistry.
b. they exhibit the same basic cell wall.
c. they perform the same mode of reproduction.
d. they have dna within their nucleus.

Answers

Answer 1

Answer:

Answer;

D. they have DNA within their nucleus.

Explanation;

-According to evolutionary theory, diverse groups of animals evolve from one or a few common ancestors and the mechanism by which this evolution takes place is natural selection.

-Natural selection is the process by which traits that enhance survival and reproduction become more common in successive generations of a population.

-All forms of life are built of cells. A cell is the basic unit of the structure and function of living things. Living things may appear very different from one another on the outside, but their cells are very similar.

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Answers

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Explanation:

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Answers

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Answer:

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Cephalopods such as squid and octopi can communicate by changing skin colors and sometimes even skin patterns. this type of communication is an example of a a chemical signal
b. sound signal
c. language
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Answers

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Answer:

d. visual signal

Explanation:

Changing color by cephalopods ssuch as squid & octopi is a type of visual signal which helps in communication. These creatures are highly social animals and for social behavior communication is a must. So, in order to communicate effectively, they often change the colors and patterns of their skin. Initially this ability to change color was meant for camouflage but later on these animals started using this ability to communicate. The control centre of such visual signals is their brain which can manipulate thechromatophores within their body. They usually use such visual signals during courtship rituals and hunting.

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Answers

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