Which one of the following is false concerning intraspecific hybrids?
A. An intraspecific hybrid is the offspring of two separate genetic lines.
B. Intraspecific hybrids result from asexual reproduction.
C. Selective breeding produces intraspecific hybrids for improved agricultural yields.
D. An intraspecific hybrid can contain desirable characteristics from two different strains.
B. Intraspecific hybrids result from asexual reproduction.
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Her skin is an example of _______________
a. an innate defense mechanism b. a first line of defense against pathogens c. an adaptive mechanism d. both an innate defense mechanism and a first line of defense against pathogens
The direct result of natural selection is a new species
Indicate whether the statement is true or false.
During which developmental stage is the human body plan set and organ formation occurs?
a. zygote b. blastocyst c. embryo d. fetus e. infant
How many copies of a specific allele does a gamete cell have?
a. 1 b. 2 c. 23 d. 46 e. 92