The principle of nuclear equivalence states that:a
developing cells become specialized to carry out specific functions.
b. developing cells follow particular differentiation pathways.
c. there is no loss of genetic information through determination or differentiation.
d. differential gene expression is responsible for variation among cells.
e. nuclear changes can take place during the entire life of an individual.
C
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In the snail Pomacea patula catemacensis, n = 13. What is the diploid number for this organism?
A) 13 B) 26 C) 52 D) 7
The FDA-approved GM Atlantic salmon have a growth hormone transgene that is expressed year-round, which is advantageous because
A) the salmon is more nutritious. B) the salmon achieve their full weight faster. C) the salmon produce more offspring. D) the salmon are more resistant to infection.
Each carbon atom can share pairs of electrons with as many as ____ other atoms
a. two b. three c. four d. five e. six
Radioactive isotopes are biological tools that are often used to
A) measure the size of fossils. B) build up a store of calcium in a cell. C) detect brain tumors and other important medical technologies. D) increase the pH of blood.