Karyo types generally remain constant within a species because
A) rearrangements occur frequently.
B) changes in chromosome number occur infrequently.
C) genetic instabilities produced by genomic changes are usually at a selective disadvantage.
D) genetic imbalances are often at a selective advantage.
C) genetic instabilities produced by genomic changes are usually at a selective disadvantage.
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In all multi-celled fungi, reproduction begins with ____
a. fusion of male and female gametes b. budding from diploid fruiting structures c. hyphal fragmentation d. fusion of gametophytes e. fusion of haploid hyphae
________ synthesized urea in the laboratory from inorganic starting materials. Much of what is now called ________ dates from this discovery
Fill in the blank with correct word.
The thymus gland, which is responsible for the development of T cells, stops growing during adolescence and shrinks as one grows into adulthood
Indicate whether the statement is true or false
An example of stabilizing selection would be___________.
A. Small lizards do not survive cold winters while large lizards are more visible to prey. B. ?All lizards have equal survival rates, regardless of size.?????? C. ?Small lizards are able to avoid detection while large lizards are too big for prey.?????? D. Larger lizards are not targets for predators.???????