Mangrove swamps
A) are formed by a single species of tree adapted to variable salinities.
B) have relatively anoxic soils.
C) occur mostly in temperate latitudes.
D) typically occur along rocky coastlines subjected to heavy wave action.
B
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What is the difference between the leading strand and the lagging strand in DNA replication?
A) The leading strand is synthesized in the ? direction in a discontinuous fashion, while the lagging strand is synthesized in the ? direction in a continuous fashion. B) The leading strand is synthesized continuously in the ? direction, while the lagging strand is synthesized discontinuously in the ? direction. C) The leading strand requires an RNA primer, whereas the lagging strand does not. D) There are different DNA polymerases involved in elongation of the leading strand and the lagging strand.
Associations between plant roots and fungi in which the fungi actually penetrate the outer cells of the plant root are
A. staphylomycorrhizae. B. streptomycorrhizae. C. ectomycorrhizae. D. arbuscular mycorrhizae.
Normal blood pressure is 120/80. What is the top number called and what is happening in the heart?
A. diastolic pressure; ventricles are relaxing B. systolic pressure; ejection of blood from the heart C. diastolic pressure; atria are contracting, ventricles are relaxing D. diastolic pressure; ejection of blood from the heart E. systolic pressure; ventricles are relaxing
The short, numerous appendages used by some bacterial cells for adhering to surfaces are called
A. sex pili. B. periplasmic flagella (axial filaments). C. fimbriae. D. cilia. E. flagella.