Observing animal tracks is an example of

observation, which is used to estimate population size.

A. mark and recapture

B. indirect

C. sampling

D. direct

Carbon dioxide is released when which of the following phenomena occur? nitrogen fixation decomposition photosynthesis burning fossil fuels

Some steps in cell division are shown below: 1. Chromosomes condense and pair up 2. Segments of DNA of sister chromatids twist and cross 3. Exchange of DNA occurs between chromosomes 4.

Which type of ion channel opens in response to neurotransmitter binding?

What is the difference between an inherited trait and a non-inherited trait?

Amoeba and phytoplankton differ in that phytoplankton can

Several genes interact, along with the environment, to determine a person's height. which inheritance pattern best explains how genes influence human height? A. multiple alleles for each gene B. homozygous recessive alleles C.

A male and female bison that are both heterozygous for normal skin pigmentation (Aa) produce and albino offspring (aa). which of Mendel principles explains why the offspring is albino. 1. dominance only 2. independent assortment only 3.

How is nucleotide biosynthesis regulated? How is the enzyme ATCase regulated?

A clothes dryer uses about 38 amps of current from a 240 volt line. How much power does it use? watts

Which of the following could cause a habitat change? a. introduction of an invasive species b. a wildfire c. a mudslide d. all of the above