In plants that undergo double fertilization, the structure that forms to nourish the seed is called the

a. endosperm.

b. egg cell.

c. gamete.

d. cone.

Mutations and sexual reproduction aid evolution by providing ... a.) variation between individuals b.) oxygen for life c.) the theory of evolution d.) comparison between species

A biology teacher asked students to give examples of genetic variation that support the idea that changes in a population environment affect genetic variation which is the least supportive example

Antibiotics are an effective treatment for a viral disease such as measles. true or false

What are four different types of weathering that can happen without the presence of water?

If future editions of the dsm change to a dimensional approach in the diagnosis of personality disorders, clinicians will have to

What is a synonym for contention? A. Assertion B. Question C. Guess D. Thought

Which of the molecular below is the main source of energy that a cell uses to carry out its daily actions? A.) NADH B.) NAD+ C.) ATP D.) Glucose

It was a hot summer day. Mattie poured herself a glass of lemonade. The lemonade was warm, so Mattie put some ice in the glass. After 10 minutes, Mattie noticed that the ice was melting and the lemonade was cold.

Match the following items. 1. Rr ... homozygous definition 2. rr ... homozygous, recessive cell 3. identical alleles ... homozygous, dominant cell 4. unlike alleles ... heterozygous, dominant cell 5. RR ... heterozygous definition

Short hair is dominant to long hair in cats. What would be the genotype of a cat with long hair