In any population there will be variations of certain characteristics. for example, in the giraffe population there is a variation in neck lengths among individuals. some have longer necks and some have shorter necks. giraffes with a longer neck variations would be more likely to survive than shorter-necked giraffes in which of these situations? a) loggers come in a chop down all of the trees b) insects can only eat the highest leaves due to the canopy c) a plant disease infects the trees, resulting in total leaf death. d) monkeys swarm in and tear off all of the lower leaves to use for shelters

Drag each tile to the correct box. match the given symbol or molecular formula to the term that best describes it. element -organic compound -inorganic elemental molecule -inorganic compound -answers given: so2, k, ci2, c6h6

Wich level of organization includes all the other levels or organizations

Choose the incorrect statement (a) the motor end plate membrane is only capable of generating graded potentials, but it is contiguous with the skeletal muscle sarcolemma, which can generate action potentials. (b) propagation of an action potential through the t-tubules into the sarcoplasmic reticulum triggers the release of ca++ into the cytoplasm of a skeletal muscle fiber. (c) the generation of suprathreshold endplate potentials in multiple muscle fibers could be due to the increased frequency of action potential generation at the axon hillock of a single motor neuron. (d) a greater amount of ach would be found in the presynaptic vesicles of a motor unit that fired several action potentials after exposure to botulinum toxin, than in a motor unit that fired several action potentials after exposure to the venom of the krait snake (which contains α-bungarotoxin).