Question 1

what type of body shape and tail shape do the triggerfish and hawkfish have?

- fusiform body shape, homocercal tail shape

- fusiform body shape, heterocercal tail shape

- depressed body shape and diphycercal tail

-compressed body shape, homocercal tail shape

point value: 3.0 points

question 2

why would their body and tail shape be a good adaptation to where they live?

-they are a top predator and need speed to hunt down their prey.

- their tail shape gives them maneuverability and their body shape allows them to fit into small places on the reefs.

- they are timid fish who feed and hide along the bottom.

point value: 3.0 points

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.