A major change occurring in the evolution of eukaryotes from prokaryotes was the development of:
A) DNA.
B) photosynthetic capability.
C) plasma membranes.
D) ribosomes.
E) the nucleus
Ans: E) the nucleus
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An energy pyramid is ____
a. a demonstration of the first law of thermodynamics b. a representation of the decline in available energy as it travels through the trophic levels c. fundamentally different from the pyramid of biomass and the pyramid of numbers d. a demonstration of the interactions between species in a community e. a representation of an ecosystem's diversity
After infection occurs, the first line of defense for a host against a parasite is the ________ response
Fill in the blank(s) with correct word
Each animal species appears to have a fixed maximum life span.
Indicate whether the statement is true or false.
A(n) (acidic/metallic/fluorescent) molecule is one that absorbs invisible radiation and emits visible light
What will be an ideal response?