Which time period would hold the record of the oldest fossils of multicellular animals, found in mountainous areas of
South Australia, and parts of Canada and China?
a. Edicarian
b. Devonian
c. Cambrian
d. Cretaceous
e. Ordovician
a
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Which of the following is NOT essential to
reproduction? a. ovary b. oviduct c. clitoris d. vagina e. uterus
A CO2 gradient between the inside and outside of a leaf is maintained during photosynthesis because
A) energy is expended by the plant to maintain the CO2 gradient. B) the CO2 concentration outside of the leaf is always increasing. C) the CO2 concentration in the mesophyll is constantly decreasing. D) the stomata close whenever more CO2 is needed.
Which structure helps prokaryotic cells attach to substrates and aid in the exchange of genetic information between cells?
A. flagella B. nucleoid C. pili D. ribosome E. capsule
External infections can be treated by (intramuscular/surface/topical) administration, in which a drug is applied directly to the site of infection.
Fill in the blank(s) with the appropriate word(s).