Describe the two processes that form and maintain submarine canyons
What will be an ideal response?
Submarine canyons could have been formed during the last ice age when sea levels were low and most continental shelves and slopes were not covered by seawater. During this time rivers carved canyons in the continental slope. These canyons eventually were covered by rising seawater following glacial melting. Alternatively, turbidity currents on steep continental slopes may carve out submarine canyons.
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Congenital deafness in humans is due to the homozygous condition of either of the recessive alleles d or e, or both
Both dominant D and E are necessary for normal hearing. Gene D/d affects the middle ear, while gene E/e affects the inner ear. It does not matter how good the normal inner ear (as indicated by E__) is; if there is something wrong in the middle ear, the individual is unable to hear. The same applies for the other gene. Give the phenotypic results of the following crosses: (a) Dd EE x Dd EE (b) Dd Ee x Dd Ee (c) dd EE x DD ee (d) Dd EE x Dd ee (e) Dd EE x DD Ee What will be an ideal response?
Connective tissue such a tendon and cartilage differs from other solid tissues in that most of its volume is made up of extracellular matrix rather than cells.
a. true b. false
The ultimate factor affecting primary productivity is ____.
A. the organic matter in all the organisms of the ecosystem B. the availability of water C. the rate of photosynthesis D. the availability of ATP E. the amount of inorganic mineral ions in the soil
Which hypersensitivity disorder is the result of cell-mediated response?
A) type I B) type II C) type III D) type IV E) both type I and II