An atom is called an ion when it has
a. either lost or gained electrons.
b. either lost or gained protons.
c. more neutrons than protons.
d. lost its nucleus.
Answer: a. either lost or gained electrons.
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Organisms must constantly bring in certain molecules and ions while keeping others out. This function is accomplished
by ____.
a. the nucleus b. lysosomes c. vesicles d. the plasma membrane e. the Golgi complex
Some clones of the original immune cells are __________ cells, long-lived B and T cells reserved for future encounters with the antigen.
Fill in the blank(s) with the appropriate word(s).
Some plants reproduce asexually through horizontal stems called
A. rhizomes. B. suckers. C. runners. D. both runners and rhizomes.
When comparing the proteome (the complete set of proteins of an organism), between worms and flies, what fractions of their genomes encodes proteins of similar function (orthologs)?
What will be an ideal response?