Which best describes the fossil record? view available hint(s) which best describes the fossil record?

1. the fossil record is a database in which fossil names and dates are collected.
2. the fossil record is the highly ordered sequence in which fossils are found in layers of sedimentary rock.
3. the fossil record is the sequence in which fossils are found in layers of sedimentary rock.
4. it is chaotic (jumbled), making it difficult to find any consistent patterns in life's evolution.
5. the fossil record is a sequence of fossils arranged from oldest (top layers of rock) to youngest (bottom layers of rock).

Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. single-celled organisms may use cell division as their method of reproduction. regardless of the reason for mitosis, the process ensures genetic continuity. what is the step in the cell cycle that ensure genetic continuity?

Which of the following terms best matches this definition: the process where humans choose the traits that will be present in the next generation through breeding. question 4 options: genetic determinism artificial selection acquired selection natural selection

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).