Which term typically refers to the number of species in a biological system?

a. biodiversity
b. ecosystem diversity
c. biogeography
d. habitat heterogeneity


a. biodiversity

Biology & Microbiology

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In electron micrographs, the appearance of the T tubule with the terminal cisternae on either side appears as three circles called a(n) ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Crocodiles are living representatives of which of the following lineages?

a. anapsids b. archosaurs c. lepidosaurs d. synapsids e. dinosaurs

Biology & Microbiology

Discuss the advantages and disadvantages of self-pollination

What will be an ideal response?

Biology & Microbiology

Preimplantation genetic diagnosis is done:a

after in vitro fertilization on cells from the embryo. b. in the womb, before birth. c. after a woman is pregnant, but before the embryo implants. d. with the help of ultrasound. e. before fertilization on the sperm and the egg.

Biology & Microbiology