The process of programmed cell death is
a. exocytosis.
b. apoptosis.
c. system acquired resistance.
d. metastasis.
e. unknown.
Answer: b
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What separates in meiosis I to reduce the diploid number (2n) of chromosomes to the haploid number (n)?
What will be an ideal response?
Mammals descended from a group of reptiles known as:
a. eutherians. b. lancelets. c. therapsids. d. holothurians. e. labyrinthodonts.
Which of the following is characteristic of gymnosperms?
a. The gametophyte generation is dominant. b. They are wind pollinated. c. They are more diverse than the angiosperms. d. They are water pollinated. e. All of the above are correct.
Which of these groups is characterized by a lack of symmetry (neither radial nor bilateral)?
A) Cnidarians B) Chordates C) Arthropods D) Flatworms E) Sponges