If birds with larger beaks are favored by the environment, it is likely that ________ selection will occur
A) directional
B) disruptive
C) stabilizing
D) standardizing
A
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Almost all chromosomally abnormal embryos and fetuses are ____________________ as pregnancy progresses
Fill in the blank(s) with correct word
All of the following are adaptations of tuna for fast swimming except:
a. warmer than ambient body temperature. b. retractable pectoral fins. c. rounded tail. d. operculum that lies tightly against the body. e. sickle-shaped tail.
The transporter indicated by the letter "A" in
the above figure represents a. an active Br transporter. b. a sodium-potassium transporter. c. a passive potassium transporter. d. a calcium-phosphorus transporter. e. none of these.
Why is there no increase in the number of offspring produced by females that have access to additional males beyond the first?
a) The fertility window for female fruit flies is very short. b) Females only ever mate with one male. c) Females are limited in their access to males and so rarely come in contact with more than one. d) Females are limited in offspring production by the availability of male sperm. e) If a single male produces more sperm than the number of eggs produced by the female, access to more sperm does not result in more offspring.