If the wrong protein is produced, it may:
a. affect DNA expression.
b. alter cellular structure.
c. influence development.
d. A and B.
e. All of the above.
E
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When (+) and (-) strains of the Zygomycete Rhizopus stolonifer meet, ________
a. they each release haploid spores which fuse to form a diploid mycelium b. they cannot mate because they are incompatible strains c. their hyphae fuse to form a diploid zygospore d. they compete for available resources
Ectodermal cells that form at the tip of the neural tube move outward to positions throughout the body. The descendants of these cells include the neurons of the peripheral nervous system. This movement of cells is an example of ____
a. differentiation b. cleavage c. embryonic induction d. apoptosis e. cell migration
The more similar the niches of two species are, the more intensely those species will _______________
Fill in the blank(s) with correct word
Some mutations do not affect an organism's phenotype. Other mutations cause minor changes, and still others cause major changes. Which is most likely to cause a major change in an organism's phenotype?
A) a substitution of a single base B) an insertion of three consecutive bases C) the deletion of one arm of a chromosome D) a deletion of two bases at the end of a gene