Which of the following keeps water from penetrating the vascular cylinder and forces the water to pass through the endodermal cells?
A. cortex
B. pericycle
C. Casparian strip
D. root band
Answer: C
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In certain plants, tall is dominant to short. If a heterozygous plant is crossed with a homozygous tall plant, what is the probability that the offspring will be short?
A) 1 B) 1/2 C) 1/4 D) 1/6 E) 0
An organism may use glycolysis and the pentose phosphate pathway simultaneously.
Answer the following statement true (T) or false (F)
On occasion, a stressful factor such as disease, starvation, or drought kills a large proportion of the individuals in a
population, producing ____ that dramatically reduces the population size.
a. natural selection b. artificial selection c. a lethal mutation d. a founder effect e. a population bottleneck
If a student randomly guesses at five multiple-choice questions during a BIO 340 exam, find the probability that the student gets exactly three correct. Each question has five possible choices.
a. 10 b. 1 c. 0.1 d. 0.05