Did H. sapiens mate with H. neanderthalensis? How do we know? What will be an ideal response?
Surprisingly yes, they did. Studies of humans native to regions where H. sapiens and H.
neanderthalensis co-existed thousands of years ago reveal that those populations have Neanderthal
genes within them. Based on our definition of a species, should H. neanderthalensis by reclassified?
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As a seed germinates, its shoot points upward toward light, and its roots grow downward into the soil. Turn the plant sideways, and the stem and roots bend according to the new direction of gravity. How do roots respond to gravity?
A. through thigmotropism B. by the absorption of light by phytochromes C. by sensing the photoperiod D. by the movement of statoliths within the cell E. through circadian rhythms
Natural selection drives evolution through the following forces except
A. competition for food. B. predators. C. climate. D. reproduction. E. competition for mates.
Which of the following molecules, if present in urine, indicates a problem with kidney function?
a) Albumin b) Creatinine c) Sodium Ions d) water
The intensity of a message is determined by how many action potentials are generated within a given time.
Answer the following statement true (T) or false (F)