Which of the following does NOT describe lipids?

One measure of population growth is the period in which a population increases to twice its size. This is referred to as the doubling time of the population.

Although the terms “climate” and “weather” are often used interchangeably, they are not the same thing. Climate differs from weather in that a. weather includes amount of rainfall per year and climate does not. b. climate is based on biomes, whereas weather is not. c. climate describes long-term patterns, whereas weather describes short-term fluctuations. d. climates are described in terms of long-term average temperature, and weather is described by other factors, such as prevailing winds.

. If an animal’s body can be sliced symmetrically along any number of vertical planes passing through the center of the animal, this displays radial symmetry.

According to the figure shown below, human populations began to experience exponential growth around    a. 160,000 BCE. c. 1945. b. 1800. d. 2005.

Nonliving factors in the biosphere are called abiotic factors.

Fossilized foot bones show that some hominids living between 3 and 3.5 mya walked upright but had partially opposable big toes. This suggests that a. the shift to bipedalism was not sudden and complete, and the earliest bipedal hominins may have also spent some time in the trees for shelter or to find food. b. the shift from quadrupedalism to bipedalism happened abruptly about 2.5 mya when hominins could no longer find any food in trees. c. hominins actually shifted from bipedalism to quadrupedalism, as it proved to be an advantage when acquiring food. d. having a partially opposable big toe helped bipedal hominins run faster to avoid their predators.

Which of the following has the highest population density? a. 1 grasshopper living in an area of 10 square meters b. 100 rabbits living in an area of 10,000 square meters c. 200 sparrows living in an area of 20,000 square meters d. 1,500 oysters living in an area of 1,500 square meters

Determine which examples are density-dependent population changes and which are density-independent population changes. a. density-dependent population change b. density-independent population change

Which of the following terms describes all organisms on Earth plus their environments? a. biosphere c. habitat b. ecosystem d. species