Which macromolecule is the main component of all cell membranes?

a. DNA
b. phospholipids
c. carbohydrates
d. steroids
e. glucose


Ans: b. phospholipids

Biology & Microbiology

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Despite their seemingly simple anatomy and radial symmetry, ______ are a type of deuterostome, and closely related to the chordates. (Check all that apply.)  

_____  Jellyfish _____  Sea urchins _____  Sea stars _____  Acoel flatworms _____  Anemones

Biology & Microbiology

Based on the temperature range and precipitation, the area on the accompanying figure labeled as 3 represents which of the following biomes?


a. savanna
b. temperate deciduous forest
c. temperate rain forest
d. taiga
e. tundra

Biology & Microbiology

What is the source of electrons for carbon fixation in plants?

a. O2 b. CO2 c. H2O d. H+ e. C6H12O6

Biology & Microbiology

Mitosis occurs in germ cells throughout life.

a. true b. false

Biology & Microbiology