Why do scientists think that whales evolved from ancient mammals and not ancient fish

An unidentified species of animal displays the following characteristics: bilateral symmetry, a complete digestive system, an open circulatory system, distinct body segmentation, and it molts when it grows.

Na or K are conducted by this neurons glycine-gated channels. However, these channels are six times as conducive to K as to Na. Would you expect glycineresponsive synapses on this neuron to be excitatory or inhibitory?

Two organisms live in the same geographical area, are very similar genetically, and can breed with each other successfully. Which of the following statements is correct? a. These organisms have undergone natural selection. b.

Does a jaguar live in the understory of the tropical rainforest

Which of the following cell parts produces energy for the cell and has its own DNA? a.) Cytoplasmb.) Cell membranec.) Nucleusd.) Mitochondria

What is the product of spermatogenesis?

What information should the nurse document in the medication record when administering a non-narcotic pain medication? select all that apply?

Lymphocytes that are clones of activated B cells or T cells that enhance resistance to future infection are called: a. memory cells. b. clones cells. c. enhanced cells. d. recall cells.

A group of scientists are studying the internal parts of a cell. Which microscope is most appropriate for these scientists to use?

Which characteristic do all protists have? A They all make or consume food. B They all survive in any environment. C They are all unicellular. D They all have flagella.