Which of the following best describes how the random sampling method works to estimate population size? An area is broken up into small plots to facilitate counting all organisms living in the entire area.
One line within an area is counted with random units to create a proportion of highly mobile animals.
A complete count of random units of known size within a larger area are used as a representative of the larger area's density to estimate total population size.
Organisms are caught and place into random quadrats to evenly distribute the population.

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

Bisphenol a (often called bpa) is a chemical found in products that people use every day, from water bottles to food containers to children's toys. unfortunately, bpa leaches out of its many products and makes its way into our bodies. what are the health effects of bpa exposure? ongoing research is finding that elevated exposure to bpa can affect a wide variety of developmental and physiological processes, but one of the first studies of bpa's health effects came about because of a simple mistake in the lab. at a laboratory at case western reserve university in 1998, geneticist patricia hunt was making a routine check of her female lab mice. as she extracted and examined developing eggs from the ovaries, she began to wonder what had gone wrong. she noticed that many of the eggs showed problems with their chromosomes, and some had irregular amounts of genetic material, which can lead to miscarriages and birth defects in mammals. she learned that a lab assistant had mistakenly washed the plastic mouse cages and water bottles with a harsh soap, releasing bpa from the plastic. knowing that bpa is an endocrine disruptor, a chemical that can enter organisms and mimic hormones, hunt set out to discover whether it had adversely affected her mice.

Organisms that successfully adapt will leave to grownone of the above