All of the following are correct about oligotrophic lakes except
A. they are often deeper than eutrophic lakes.
B. their deep water is rich in oxygen.
C. they have an abundance of minerals and organic material.
D. they are highly susceptible to detergent and sewage contamination.
E. they are highly susceptible to pollution from fertilizer runoff.
Answer: C
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Gastrulation is controlled by signal-sending cells that
cause movement of neighboring cells and this is called __________. Fill in the blank(s) with the appropriate word(s).
Dystrophin is a protein that normally
A. shortens and lengthens to produce muscle contraction. B. carries signals into muscle cells to initiate contraction. C. strengthens the attachment between muscle proteins and the plasma membrane. D. helps provide energy for muscle contraction. E. signals muscle cells to divide.
The reactions of photosynthesis take place in the ________ of prokaryotes
A) thylakoids B) cytoplasm C) nucleoid D) cristae E) outer membrane
If you cross two pea plants, one with green peas and the other with yellow peas, you find all of the offspring have yellow peas. You conclude the yellow parent was
A. homozygous for the recessive allele. B. heterozygous. C. homozygous for the dominant gene. D. homozygous for the dominant allele. E. homozygous for the recessive gene.