But does everyone on earth have an equal right to an equal
share of its resources? The spaceship metaphor can be
dangerous when used by misguided idealists to justify
suicidal policies for sharing our resources through
uncontrolled immigration and foreign aid. In their
enthusiastic but unrealistic generosity, they confuse the
ethics of a spaceship with those of a lifeboat.
-Garrett Hardin, "Lifeboat Ethics: The Case Against
Helping the Poor
Which word does the author use to show that he believes the
spaceship metaphor is inaccurate?
O A. equal
O B. everyone
O C. enthusiastic
O D. dangerous

Ascientist wants to determine the effect of a new type of gasoline. he fillsone car with normal gasoline and another identical car with the new gasoline.which is the control group? a. the new type of gasolineb. the car with the normal gasolinec. the car with the new gasolinethe amount of gasoline usedd. the amount of gasoline used

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.

What must be done to breed dogs for a partical trait