How long does a water molecule circulate in the water cycle?

Answer

1. until it combines with a different type of molecule

2. usually about 10,000 years

3. until something drinks it

4. Indefinitely; it is impossible to tell.

What are two examples of Natural Selection?

Discuss ecology for a discovery and hypothesis driven aspect.

What is the correct sequence of these genes on the X chromosome? a. s sc v (sc in the middle) b. sc s v (s in the middle) c. sc v s (v in the middle)

What is the most common monomer for polysaccharides?

A pea plant with purple flowers (and unknown genotype) is crossed with a pea plant with white flowers. one-half of the offspring have purple flowers and one-half have white flowers. what are the genotypes of the parent plants? see section 11.

What prevents blood movement from left ventricle to left atrium

What happens in an aphotic zone of a body of water

Which of the following items would be an ecosystem within the ocean ecosystem? a. marshes b. coral reefs c. rivers d. ponds

The universal genetic language of dna is common to virtually all organisms on earth. True or False

Why use a negative control when running gel electrophoresis? if a band shows up in this lane, what does it tell you about your pcr products?