Biology, 11.04.2020 04:47, spacehunter22
Although choanoflagellates are fundamentally unicellular organisms, they possess genes that code for cadherins and integrins. Which of the following hypotheses regarding the function of these molecules in choanoflagellates is supported by laboratory experiments?
a. Cadherins and integrins are used for cell adhesion during the formation of temporary multicellular structures to defend against predators.
b. The genes are not actually expressed and are simply vestiges of an ancestor that used cadherins and integrins for adhesion.
c. Cadherins and integrins are used for cell adhesion during the formation of complex multicellular structures that are resistant to freezing temperatures.
d. Choanoflagellates use adhesion molecules to help capture bacterial prey.
e. Choanoflagellates are parasites and use cadherins to attach to host organisms.
Answers: 1
Biology, 21.06.2019 20:00, terriblexsiren
The images show the wings of a bat and a bee. from this evidence, what can you conclude about the evolutionary relationship between these organisms? a. the wing structures of the bat and the bee are different, indicating they didn’t inherit wings from a common ancestor. b. the wing structures of the bat and the bee are different, indicating they inherited wings from a common ancestor. c. the functions of bat wings and bee wings are the same, indicating they obtained wings from a common ancestor. d. the functions of bat wings and bee wings are different, indicating they didn’t obtain wings from a common ancestor.
Answers: 3
Biology, 22.06.2019 03:30, amp1955
Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.
Answers: 1
Biology, 22.06.2019 12:30, Diaryyy3986
Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled
Answers: 1
Although choanoflagellates are fundamentally unicellular organisms, they possess genes that code for...
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