In a comparison of birds and mammals, having four limbs is

often know as the powerhouses of cell this organelle generates energy for the cell through cellular respiration this means it takes in nutrients from the cell breaks it down and turns it into energy

An organism that reproduces sexually has a diploid number of 50 how many chromosomes will a gamete of this organism have

g If the results of a cross produce a greater number of genotypes than phenotypes, you can safely assume: a) A homozygous dominant was crossed to a homozygous recessive. b) A homozygous dominant was crossed to a heterozygote.

Adrenal glands in males release , which are secreted during puberty.

What happens to the atmospheric temperatures when the carbon dioxide levels increase? Decrease?

Which layer of soil is least likely to be penetrated by plant roots? a. O (organic matter) b. A (topsoil) c. B (subsoil) d. C (parent rock)

Describe the differences between a chromosome and a DNA molecule.

What role does oxygen play in a plants life?

Which measures the mass of an object? A) a spring scale (in N) B) a height scale (in feet) C) a graduated cylinder (in mL) D) a triple beam balance (in grams)

In his study of pea plants, Gregor Mendel used which method to produce offspring? O cross-pollination, by using parents that had identical traits O cross-pollination, by using parents that had different traits O self-pollination, by using one parent