Plants have a ______ life cycle in which the haploid and diploid stages are multicellular.
Fill in the blank(s) with the appropriate word(s).
haplodiplontic
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Imagine a scenario in which a common population of animals is separated into two groups by a natural event. Over time, you might expect the two populations to become ______ genetically related. This process is known as ___________ speciation
A. less; sympatric B. more; sympatric C. less; allopatric D. more; allopatric
Amphiarthroses
What will be an ideal response?
You are examining an organism recently found on Mars and are currently trying to identify one of its neurotransmitters. Biochemical characterization indicates that it is a derivative of the amino acid tyrosine,
so you classify the novel neurotransmitter as a(n) A) acetylcholine analogue. B) catecholamine. C) neuropeptide. D) serotonin analogue. E) GABA analogue.
Which statement best explains contact inhibition?
a. Contact between neighbouring cells triggers reactions that lead to inhibition of mitosis. b. As cell number increases, the level of waste products increases, consequently slowing metabolism and leading to mitosis. c. As cell number increases, the protein kinases they produce compete with neighbouring cells, thus inhibiting mitosis. d. As neighbouring cells become more tightly packed together, their size is restricted and cytokinesis can no longer occur.