Which of the following statements is not true concerning root hairs?
a. They are tubular extensions of epidermal cells.
b. They are continually formed in the area of cell maturation.
c. They are quite numerous.
d. They greatly increase the absorptive capacity of roots.
e. They are long lived .
E
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What is the pattern component of the theory of chemical evolution?
A) Heat and electrical discharges were required for chemical evolution to occur. B) Most chemical evolution occurred at black smokers. C) The process occurred at black smokers, in the atmosphere and oceans, or in outer space. D) Increasingly complex carbon-containing molecules formed early in Earth history.
In a monohybrid cross
(a) only one trait is being considered. (b) the parents are always dominant. (c) the parents are always heterozygous. (d) no hybrid is produced. 9. The genetic makeup of an organism is it
You have a patient who complains of pain in his joints. You ask whether he drinks much water during the day and find out he does not. You therefore suspect conversion of his usual nitrogenous waste ___________ into ____________, followed by deposition into his joints.
A. ammonia, urea B. urea, ammonia C. uric acid, urea D. urea, uric acid E. uric acid, ammonia
VNTRs are useful in DNA forensics because ________
A) the number of VNTRs varies between people B) the VNTRs have exactly the same sequence between people C) the VNTRs have very little variation in length D) the VNTRs act as an identifier for a group of individuals