Two species of garter snakes live in the same geographic area. One mainly lives in water, and the other mainly on land, so they rarely encounter each other and do not interbreed. This is an example of what type of isolating mechanism?
A) temporal B) ecological C) mechanical D) directional
Answer: B
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Rhodophyta consist of 4,000 species of ____algae
a. brown b. red c. golden d. green e. blue-green
We now know that chloroplasts are derived from which group of free-living organisms?
a. mitochondria b. algae c. cyanobacteria d. archaea
Mei had high blood pressure, so her physician gave her a prescription for a certain drug that lowered her blood pressure by allowing more sodium ions to be excreted in the urine. This drug interfered with the making of ________
A) erythropoietin B) atrial natriuretic hormone C) angiotensin II D) growth hormone
Mendel crossed true-breeding pea plants and found the dominant trait always appeared in the F1 generation, but it appeared in a ________ ratio of dominant to recessive in the F2 generation
A) 1:2 B) 1:1 C) 3:1 D) 1:3