What is made by fermenting milk with Streptococcus thermophilus and Lactobacillus bulgaricus?
A. Sour cream
B. Kefir
C. Tofu
D. Yogurt
E. Cheese
Answer: D
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The process of fertilization
a. is random in the selection of which gametes fuse. b. is not random but selects for gametes with a greater number of paternal chromosomes. c. is not random but selects for gametes with a greater number of maternal chromosomes. d. is not random but selects for gametes with the fewest mutations. e. is not a source of genetic variability in progeny.
Polyploidy refers to ____ and occurs most often in ____
a. an individual getting one or more additional sets of chromosomes; plants b. an individual getting one or more additional sets of chromosomes; animals c. an individual lacking one or more sets of chromosomes; plants d. an individual lacking one or more sets of chromosomes; animals e. an individual lacking one or more sets of chromosomes and receiving additional sets of other chromosomes; animals
Carbon mainly cycles between the biotic and abiotic worlds through the processes of
A) cellular respiration and transpiration. B) transpiration and photosynthesis. C) evaporation and photosynthesis. D) cellular respiration and photosynthesis.
What kind of interaction occurs when two cardinals (birds of the same species) are trying to build a nest in the same tree?
a. intraspecific competition b. mutualism c. fundamental competition d. interspecific competition