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match the following.

1. external fertilization

a. refers to grown or mature animals or plants

2. diplontic

b. something which lives in or pertains to water

3. organ

c. a process changing cells from a generalized to a more specific condition

4. internal fertilization

d. meiosis produces gametes and the bulk of the life cycle is passed as a diploid

5. differentiation

e. an early stage in the development of an animal or plant

6. adult

f. occurs outside the body of the female

7. haplontic

g. meiosis occurs shortly after fertilization, and most of the life cycle is passed as a haploid

8. tissue

h. occurs inside the body of the female

9. embryo

i. a group of tissues with a specific function in a part of the body

10. terrestrial

j. something which occurs on the land or refers to the land

11. aquatic

k. a group or mass of cells having a common function

Cells tend to have a relatively small and uniform size. why aren’t cells larger?

Which layer will become saturated first when rain falls?

Bisphenol a (often called bpa) is a chemical found in products that people use every day, from water bottles to food containers to children's toys. unfortunately, bpa leaches out of its many products and makes its way into our bodies. what are the health effects of bpa exposure? ongoing research is finding that elevated exposure to bpa can affect a wide variety of developmental and physiological processes, but one of the first studies of bpa's health effects came about because of a simple mistake in the lab. at a laboratory at case western reserve university in 1998, geneticist patricia hunt was making a routine check of her female lab mice. as she extracted and examined developing eggs from the ovaries, she began to wonder what had gone wrong. she noticed that many of the eggs showed problems with their chromosomes, and some had irregular amounts of genetic material, which can lead to miscarriages and birth defects in mammals. she learned that a lab assistant had mistakenly washed the plastic mouse cages and water bottles with a harsh soap, releasing bpa from the plastic. knowing that bpa is an endocrine disruptor, a chemical that can enter organisms and mimic hormones, hunt set out to discover whether it had adversely affected her mice.