What type of sensory receptor is a hair cell?
A. nociceptor
B. electroreceptor
C. mechanoreceptor
D. chemoreceptor
C
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Use the principle of parsimony and molecular genetic data to choose a phylogenetic tree for your hypothesis of how the extant species were derived from the ancestor.
A. Tree 1 requires the most mutations, making it the best choice.
B. Tree 1 requires the fewest mutations, making it the best choice.
C. Tree 2 requires the most mutations, making it the best choice.
D. Tree 2 requires the fewest mutations, making it the best choice.
E. Both trees are equally good because sequences A, B, C, and D are the same in both.
A molecular analysis of plasma or nuclear membranes would reveal the presence of _____
a. cellulose and chitin b. suberin and cutin c. phospholipids and proteins d. microtubules and microfilaments e. phospholipids and nucleic acids
If a homozygous black bull is mated with a homozygous white cow and the calf is gray, this would be an example of ___________. However, if the calf has black and white spots this would be an example of _______________.
a. incomplete dominance; a sex-linked trait b. complete dominance; polygenic trait c. codominance; homology d. incomplete dominance; codominance
Genes can be transferred between prokaryotic cells when they exchange ________ .
A) ribosomes. B) mitochondrial DNA. C) nuclei. D) plasmids. E) cytoplasms