The temperature of the lower atmosphere has risen the most
a. in the last 150 years.
b. in the last 60 years.
c. in the last 250 years.
d. in the last 100 years.
e. in the last 1000 years.
B
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Why is it so important that all of the chromosomes align on the metaphase plate during metaphase?
A. This is the only place in the cell where the cyclins and Cdks are located. B. If they cannot, it suggests that they aren't properly attached to the spindle microtubules, and thus won't separate properly during anaphase. C. This is the location where the chromosomes can become attached to the spindle microtubules. D. This allows asters to form. E. This allows sister chromatids to form.
The kinetochore holds the homologous chromosomes together.
Answer the following statement true (T) or false (F)
Point mutations
A. are due to a change in one DNA nucleotide B. may change a specific codon C. can cause a genetic disease such as sickle cell disease that is due to a base change that codes for valine rather than glutamate D. all of the choices are correct
Insulin and many other hormones are protein molecules. Based on your knowledge of transport processes, you can say that cells that secrete these types of hormones do so through:
A) pinocytosis. B) receptor-mediated endocytosis. C) passive diffusion. D) exocytosis. E) facilitated diffusion.