Which is not true about a hypothesis? it must be able to be tested. it is in the form of an if, then statement. it contains either an independent or dependent variable, not both. it is a proposed explanation that has not yet been proven to be true.

Where is the energy in a sucrose molecule stored? o a. inside the hydrogen atoms o b. inside the carbon atoms o c. in the bonds between the atoms o d. inside the protons

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population.b) the separated population is small, and genetic drift occurs.c) the isolated population is exposed to different selection pressures than the ancestral population.d) different mutations begin to distinguish the gene pools of the separated populations.e) gene flow between the two populations is extensive.