Why is it important for cells to be able to communicate with one another? List the main steps involved in cell
signaling. What will be an ideal response?
It is important for cells to communicate in order to grow, develop, and function. Cell
signaling requires four mains steps shown in Figure 6.2.
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ws+; ws+; ws; ws; ws+; ws+; ws; ws
In Neurospora, the white-spore allele (ws) results in white spores rather than the wild-type black spores. Diploid ws / ws+ cells undergo meiosis followed by one round of mitosis to form ordered tetrads. Indicate if the pattern of spores seen in the tetrads are consistent with first-division or second-division segregation. A) first-division segregation pattern B) second-division segregation pattern
Which of the following characteristics of capillaries is most directly related to their function of molecular exchange?
A. Capillaries lack muscles. B. Capillaries are located between arteries and veins. C. Capillaries allow blood to flow through them very rapidly. D. Capillaries have extremely thin walls.
Tundie is an accomplished lab technician. She wants to determine whether her boyfriend is still smoking marijuana, a habit he swore he would give up. She can't test his blood for THC because performing this test might arouse the suspicions of the
authorities. Which of the following blood findings might suggest that her boyfriend is still smoking weed? A) increased blood carbon monoxide B) low blood oxygen C) high blood niacin D) substantial nicotine in the blood
Replication of the DNA occurs during
A. metaphase. B. prophase. C. telophase. D. anaphase. E. interphase.