What structures cushion the embryo during development and allow it to be provided with nourishment and exchange wastes?
Answer: extraembryonic membranes
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Which of the following cell types are specifically part of the adaptive immune system? Select all correct choices
A. eosinophils B. plasma cells C. mast cells D. dendritic cells E. helper T cells
What diffuses across the narrow synaptic cleft between the presynaptic axon and the postsynaptic cell to transmit a nerve impulse?
A. neurotransmitter B. electrical impulse C. Na+ ion D. vesicle E. action potential
Indels are
A) index deletions used to identify a species. B) parsimonious trees. C) transitions and transversions combined. D) small deletions or insertions that produce gaps in sequence alignments. E) the result of codon usage bias.
Increased exposure to UV radiation is expected to increase rates of __________ in humans
a. cataracts b. glaucoma c. psoriasis d. shingles e. alopecia