Dissimilative sulfur and sulfate reduction generally results in the production of what gas?
a. hydrogen sulfide (H2S)
b. ferrous sulfide (FeS)
c. sulfite (SO32–)
d. thiosulfate (S2O32–)
Answer: A
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How do bryophytes obtain water and CO2?
A. They obtain CO2 only through stomata and water through their roots. B. They obtain water through their stomata and CO2 through roots. C. They absorb both CO2 and water directly from the environment, without passing through stomata or roots. D. They have difficulty absorbing water and CO2 due to their thick, waxy cuticle. E. They live in moist environments, so they do not need to absorb water or CO2.
Using today's genetic technology, it is possible to select ____________________ for specific traits
Fill in the blank(s) with correct word
Marine turtles mate at sea but lay their eggs on land
Indicate whether the statement is true or false
Which of the following is not a normal portal of exit of an infectious disease?
A. Skin B. Coughing and sneezing C. Urogenital tract and feces D. Removal of blood E. All of these are normal exit portals.