Diffusion of morphogens—products of master
genes—creates gradients that cause the differential
expression of other genes such as __________,
which govern the formation of specific body parts. Fill in the blank(s) with the appropriate word(s).
Answer: homeotic genes
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Plants can remove harmful chemicals from the soil by the process of
A. glandular secretion by leaves. B. CO2 activation. C. phytoremediation. D. fertilization. E. root nodule formation.
The quick response of the immune system to a second infection is due to the _____, a feature of the immune system as
demonstrated by the success of vaccines. a. activation of macrophage cells b. suppression of suppressor cells c. T and B memory cells d. high levels of antigen e. new cytotoxic T cell.
Which of the following are functions of the skeletal system?
a) support the body b) hemopoiesis c) conduct impulses d) provide protection
What gametes will be produced after meiosis of the following chromosome pair? Sd = active segregation dis-torter allele, Sd+ = inactive segregation distorter allele, Rsps = response sensitive responder gene allele,
Rspi = response insensitive responder genes allele. What will be an ideal response?