16 questions
Many angiosperms depend on animals for (a) .
both (a) and (b)
pollinating their flowers (a)
distributing their seeds (b)
providing food (c)
Which invertebrates are generally small, allowing them to live on little food and to hide from enemies? (a)
Which of the following are vertebrates? (a)
Which of the following are nonvascular plants? (a)
Archae and bacteria are (a) .
Which of the following is an abiotic factor in an ecosystem? (a)
Natural selection is the unequal survival that results from the presence or absence of (a) .
The place that contains everything an organism needs is its (a) .
A desert ecosystem contains (a) .
all of the above
air (a)
living things (b)
sand (c)
Unicellular organisms with cell walls but no nuclei are (a) .
artificial selection | change in the genetic characteristics in a population from one generation to the next | ||
adaptation | process that causes the characteristics of a population to change in a way controlled by humans | ||
evolution | trait that increases an organism's chance of survival | ||
natural selection | trait that may be unintentionally selected by humans | ||
resistance | process that causes the characteristics of a population to change without human control |