What are specialized cells (egg cells and sperm cells, for example) used for sexual reproduction?
What will be an ideal response?
gametes
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What is the most efficient way to regulate gene expression from the perspective of cellular resources? What will be an ideal response?
Which of the following is the most direct source of energy for cotransport?
-the movement of one of the transported substances up its concentration gradient -the movement of one of the transported substances down its concentration gradient -ATP hydrolysis -ATP formation cotransport requires no energy
Echinoderms and chordates are
a. deuterostomes. b. protostomes. c. animals whose blastopore becomes a mouth. d. both b and c.
What process occurs when cancer cells detach from tumors and spread to other parts of the body?
A) angiogenesis B) carcinogenesis C) metastasis D) mutagenesis