Which best describes an organism's niche?

life span

habitat

environment

role

Explain how a child gets one copy of each gene from his/her mother and another copy of each gene from his/her father

In dna how many hydrogen bonds do you need between c and g

An organism has body cells with 22 chromosome A body cell prepares for cell division. How many chromosomes does it have at the beginning of prophase?

What effect do calcium ions have on the water in ecosystems? A. They reduce its pH. B. They decrease its salinity. C. They add to its hardness. D. They increase its acidity.

Echinoderms generally have endoskeletons. a. True b. False

In humans, normal color vision is dominant over colorblindness. A colorblind male marries a female who is a carrier for color blindness. What is the probability that a colorblind child would be born to these parents?

What is the dependent variable? Also what is the Testing Variable.

Statistics about the climate in a tundra ecosystem were collected for 30 years. which hypothesis about a population of caribou could be made based on the climate data collected? a. caribou calf survival is directly related to annual rainfall amounts.

Since plant cells do not have centrioles, how do they make spindle fibers during mitosis?

Plants use sunlight to produce some ATP during photosynthesis. How do plants produce ATP when the Sun is not out? a. Plants are secondary consumers. b. Plants also use cellular respiration. c. Plants extract ATP from the stars. d.