Which of the following ecological units includes abiotic factors?

A. A community

B. An ecosystem

C. A population

D. A trophic level

Natural selection is based on all of the following except a. genetic variation exists within populations. b. the best-adapted individuals tend to leave the most offspring. c.

Which set of data would be best illustrated with a bar graph

Draw conclusions: how well did the punnett squares predict the offspring percentages for each parent pair?

Which is not true regarding the spleen? a. it has an outer cortex and inner medulla. b. it is divided into sections by capsular extensions called trabeculae. c. its white pulp consists of lymphatic cells?

What type of development do Sawfish have?

A membrane that only "lets" certain molecules in while keeping other molecules out is ___ ___.

In cats, striped fur (T) is a dominant trait. The recessive allele (t) results in black fur. Two cats heterozygous for striped fur have kittens. Which best describes the kittens? Female Tabby Cat T t Male Tabby Cat T t

How are Gametes, Sporophyte, Gametophyte, and Zygote related?

Which terms below are associated with communication between neurons? chemical signals, electrical signals, synapse chemical signals, synapse, neurotransmitters synapse, electrical signals, chemical signals synapse, electrical signals,

What did Thomas Hunt Morgan discover?