How is a species defined?

O

A. By the allele frequency in the population

O

B. By the number of common ancestors

O

c. By the total number of chromosomes

O

D. By the fixed alleles in the species

When you eat a hamburger, some of the energy in the food is converted to ATP that your cells can use to do all kinds of work, some of the energy is stored for later use, and some of the energy is dissipated as heat.

Roots or plant growth making cracks in concrete IS IT Mechanical or chemical

Major floods can cause the breakdown of rocks into smaller pieces without changing their chemical composition. This is an example of Select one: A) physical weathering only. B) physical weathering and rusting.

Sulfur dioxide (SO2) and hydrogen sulfide (H2S) gases are released on a large scale by certain forms of industry, and can react with oxygen to form sulfur trioxide gas (SO3) or with water to form sulfuric acid (H2SO4).

13. The Richter scale describes how much energy an earthquake releases. With every increase of 1.0 on the scale, 32 times more energy is released. How many times more energy would be released by a quake measuring 2.0 on the scale?

One of the first breakthroughs in biotechnology was the discovery of the gene that makes insulin. Part of this process involved scientists making DNA to match each possible sequence of insulin mRNA. What was the next step of this process? A.

If mollusks evolved before arthropods, where will their fossils be found?

Over time, a river cut through a field where some mice lived and some birds were nesting. Tell over time why the mice developed into 2 different species, but the birds did not

Using radioactively labeled dna probes in studies of heredity makes it possible for a scientist to

During the first four days after conception, the zygote undergoes rapid cell divisions and becomes multicellular. What is this cell division called?