What has constantly changing amount of salt in the water

Why is a DNA molecule called a double helix? A. Each nucleotide has two main parts: a base and a phosphate. B. The sugar and phosphate parts are the same in all DNA molecules. C. There are two kinds of nitrogen bases in a DNA molecule. D.

What is the proper name for Canis lupus familiaris?

A researcher observes cells from a multicellular organism under the microscope. The cells appear to have cell walls, but lack chloroplasts. He identifies the cells as belonging to Kingdom Fungi. Is his identification correct

Imagine a large source popul ation of 500 flies at a particular time that we will call t0. the flies have brown or ebony bodies. based on the information given above, how many total alleles for body color exist in the population?

MDCK and A549 cell cultures were grown in complete minimum essential medium (MEM) with 10% fetal bovine serum (FBS), 100 U/mL penicillin G, 100 ug/mL streptomycin sulfate, and 2mM glutamine.

Scientists combine evidence from fossils, body structures, early development, DNA, and protein structures to a. determine what bones an animal has in its forelimbs. b. determine the evolutionary relationships among species. c.

Where is strep found in nature?

An atom contains one proton, one electron, and one neutron. Which two particles are most similar in mass? the neutron and the electron the proton and the electron the proton and the neutron the neutron and the atom

The table below shows a list of radioisotopes and their half-lives. The radioisotope that has the longest half-life is the best to use in powering planet and space exploration vehicles because they can travel farther.

Describe briefly how non green plants get their food?