Pigs have digitigrade locomotion because they walk on
(a) their ankles.
(b) the soles of their feet.
(c) the tips of their toes, which are modified as hooves.
(d) their hands and knees.
(c) the tips of their toes, which are modified as hooves.
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Which type of nutrient can pass across epithelial cells without any expenditure of ATP?
A. iron B. calcium C. protein D. fat E. magnesium
Phytoremediation is ____
a. rotating crops so that soil minerals are replenished b. replacing eroded topsoil so that plants can grow in the soil again c. plowing under all or parts of crops to improve the soil d. the use of plants to remove pollutants from the environment e. replacing unwanted plants with plants useful to humans
Non-inbred mice had a consistently lower survival than inbred mice
__________ Indicate whether the statement is true or false.
During transfer of T-DNA to a plant cell, what is transferred?
a. the original double-stranded T-DNA, displaced by synthesis of a new double-stranded copy b. a newly synthesized double-stranded copy of the original T-DNA c. the entire Ti plasmid, and all but the T-DNA is degraded d. a single pre-existing DNA strand displaced by the synthesis of a new strand e. a newly synthesized single strand