What leads to an individual having too many or two few chromosomes?
A) Crossing over
B) Independent assortment
C) Homologous recombination
D) Nondisjunction
D
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Upon close inspection of movement in annelids and nematodes, you would notice an obvious difference. Nematodes tend to wriggle back and forth, while annelids tend to contract along their length as their girth swells and then thin out as they stretch
What anatomical feature explains this type of movement? A) The annelids possess longitudinal muscle fibers that the nematodes lack. B) The nematodes lack circular muscle fibers. C) Nematodes lack a coelom. D) Annelids have a highly specialized nervous system capable of more complex movements.
Which of the following is not a function of an antibody?
A) activate complement cascade B) attract phagocytes C) stimulate helper T cells D) neutralize toxins
At what point in meiosis do the homologous chromosomes separate from one another?
A) telophase I B) telophase II C) prophase II D) anaphase I E) metaphase I
Describe the factors that are contributing to the biodiversity extinction crisis we are currently experiencing.
What will be an ideal response?