Scientists think that the first eukaryotic cells did not have a cell wall. Indicate a disadvantage to this, and tell how cells might have compensated for it. Give an advantage to this, and tell how cells might have exploited it
What will be an ideal response?
Disadvantage - no mechanical support and osmotic protection. Compensated by cytoskeleton, choosing environments, osmotic regulation at membrane. Advantage - ability to eat other organisms whole. Exploited by becoming very efficient cellular predators.
You might also like to view...
Based on the phylogeny shown, we can conclude that species 2 is most closely related to species
A. 1.
B. 3.
C. 4.
D. 5.
E. 1 or 3 (can't tell).
Clarify Question
· What is the key concept addressed by the question?
· What type of thinking is required?
· What key words does the question contain and what do they mean?
Gather Content
· What do you already know about phylogenetic trees?
Consider Possibilities
· What other information is related to the question? Which information is most useful?
Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
Reflect on Process
· Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Behavioral responses that animals may or may not use are called facultative
Indicate whether the statement is true or false.
The amount of energy available to do work is called
A. activation energy. B. free energy. C. potential energy. D. kinetic energy.
Which large animals were wiped out by the Cretaceous extinction?
A) mammoths B) dinosaurs C) whales D) sharks