Which of these do all prokaryotes and all eukaryotes share?
a) cell wall
b) plasma membrane
c) nuclear envelope
d) organelles
Answer: b) plasma membrane
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Researchers have found that an octopus given a clear plastic box with three different types of lids and a crab inside will eventually figure out how to get at least one of the lids open to get the crab. They have also shown that after a new octopus observes a veteran octopus (who already knows how to open the box), the new octopus is able to open the box and always uses the same type of lid that the veteran used. What term best describes these behaviors?
A. cognitive learning B. innate C. imprinting D. habituation E. associative learning
If mRNA is not modified what will result? a. The mRNA will not be able to leave the nucleus
b. The cell will self destruct. c. Mutation. d. The new protein will become activated earlier. e. The DNA code will become altered.
In order for something to be considered a skeleton, it must contain bone or some other hard substance.
Answer the following statement true (T) or false (F)
What molecule is the body’s main energy source?
a. oxygen b. carbon dioxide c. glucose d. fats e. proteins