In which animals would diffusion alone not be an effective transport mechanism for gas exchange?
a. nematodes
b. sponges
c. cnidarians
d. annelids
e. flatworms
D
Biology & Microbiology
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What type of cell does HIV infect?
A. helper T cells B. B cells C. red blood cells D. phagocytic cells E. All of the answer choices are correct
Biology & Microbiology
Which embryonic tissue is incorrectly associated
with its derivative? a. skin; mesoderm b. nervous system; ectoderm c. liver; endoderm d. circulatory system; mesoderm e. brain; ectoderm
Biology & Microbiology
Describe a situation in which two aneuploid gametes would yield a euploid zygote
What will be an ideal response?
Biology & Microbiology
Artificial hearts are used routinely today to replace damaged hearts when a donor heart is not available for transplant
Indicate whether the statement is true or false
Biology & Microbiology