A fertilized egg is called a
A. zygote
B. ovule
C. oocyte
D. blastocyst
A. zygote
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Cystic fibrosis is autosomal recessive. This means that
A) both sexes can be affected and can "skip" generations through carriers. B) carrier mothers pass the mutation to some of their sons, but not to their daughters. C) each affected individual has at least one affected parent. D) both sexes are affected because new mutations occur frequently.
During the water cycle, water evaporates from plants through a process called transpiration. Which similar process occurs during the carbon cycle?
A) Carbon dioxide is absorbed by soils. B) Carbon-based sugars are ingested by animals. C) Carbon dioxide is respired by animals. D) Carbon dioxide is absorbed by plants and converted to sugars.
Which of the following represents what Darwin thought of natural selection?
a. He reasoned that if characteristics that better enable organisms to adapt to specific environmental pressures exist, then selective breeding could do the same. b. He reasoned that if a person could select different characteristics when breeding organisms, then nature could do so as well. c. Humans were selecting the characteristics they wanted in the offspring by choosing parents with those traits. d. Humans were selecting the characteristics they wanted in the offspring by eliminating indiv
How many haploid sets of chromosomes are present in a diploid individual cell with a chromosome number of 32?
A) 16 B) 32 C) 2 D) 1 E) 8