PLEASE HELP FILL IN THE BLANKS:
Ecology is the study of organisms and their habitats. All the habitats that make up a forest, river, or desert are called an . The and non- parts of an ecosystem are all interconnected. Living rely on the abiotic, or , parts of the ecosystem. Examples of abiotic factors could include:. A contains many . A consists of many individual of one type. Each unique type of is called a species.

The large ground finch obtains food by cracking seeds. what is its short, strong beak an example? a) tendency toward perfection b) adaptation of a species over time c) selective use and disuse of an organ over time d) scarcity of recourses

How would you describe the the organisms in the second row of model 1 that are connected to the parents by a line

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).