Which of the following is(are) used in the overall reactions for photosynthesis?
a) carbon dioxide.
b) water.
c) light.
d) all of the above.
Answer: d) all of the above.
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At some of the lowest light concentrations, ________ can still grow well due to their ________, which effectively harvest photons for energy
A) green bacteria / antenna pigments B) green bacteria / chlorosomes C) purple bacteria / antenna pigments D) purple bacteria / chlorosomes
Oral contraceptives work by _____
a. changing the pH of the uterus so sperm cannot live b. changing the temperature of the uterus so sperm cannot live c. blocking the entrance to the uterus d. killing sperm e. preventing ovulation
The animal gut cavity may be a fully lined coelom or a partially lined __________.
Fill in the blank(s) with the appropriate word(s).
Which statement is true about the relationship between viral infection and cancer?
a) Any virus type can cause cancer if it infects the "right" cell type b) Only people with compromised immune systems get cancer from viral infection c) About one fifth of all cancer types can be linked to viral infection d) Tumors that arise from viral infection never become malignant