A pea plant that is heterozygous for the flower color gene makes gametes. What is the probability that a specific gamete contains the recessive white allele for flower color?
a. 0 percent
b. 25 percent
c. 50 percent
d. 75 percent
e. 100 percent
Ans: c. 50 percent
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Movement is provided by contractions of ______ tissue.
A. epithelial B. connective C. muscle D. nervous E. All of the answer choices are correct.
One current estimate claims that humans are responsible for the extinction of how many species per
hour? a. 2 b. 3 c. 4 d. 5 e. 6
________ is the process whereby cells engulf pathogens and foreign substances
Fill in the blank(s) with correct word
Which of the following statements about acid precipitation is false?
a. It can decrease soil pH. b. It is implicated in forest decline. c. It drops sulfuric and nitric acids on the Earth. d. It is caused by human activities. e. It prevents the leaching of essential cations