The red-cockaded woodpecker is a keystone species in pine forests of the southeastern United States. Red-cockaded woodpeckers feed on insects and nest in cavities that they bore into pine trees. Many other species of animals use these cavities
for roosting and nesting after they are abandoned by the woodpeckers.
If the population of red-cockaded woodpeckers suddenly decreased in a certain forest, which of the following would most likely
occur in the ecosystem over time?
ОА.
an increase in number for populations that are predators of woodpecken
ОВ.
a decrease in the number of pine tree cavities available for other species to nest in
OC. an increase in the number of species that live in pine tree cavities
D
a decrease in competition between other species that nest in pine tree cavities

What are two reasons for why a species might disappear from the fossil record?

Which of the following are false concerning microbes? a. microbes generate oxygen through photosynthesis. b. the primary role of microbes on the planet involves causing disease in animals and humans. c. microbes produce vitamins in the intestines. d. microbes play a role in breaking down waste and decomposing dead organisms.

Chapter 11.1 & 11.2 notes section 11.1 1. every living thing has a set of ? inherited from its parents. 2. after becoming a ? , mendel spent several years studying ? and mathematics at the university of vienna. 3. during sexual reproduction, male and female reproductive cells join, a process known as ? . 4. pea flowers are normally ? , which means that sperm cells in pollen fertilize the egg cells in the ? flowers. 5. when mendel crossed plants with ? characters for the same trait, the resulting offspring had only one of the characters. 6. a ? is a specific characteristic, such as seed color or plant height, that varies from one individual to another. 7. filius and filia are the latin words for ? and ? . 8. the offspring of crosses between parents with different traits are called ? . 9.to mendel's surprise, all of the offspring had the character of only ? of the parents. 10. mendel's first conclusion was that biological inheritance is determined by ? that are ? from one generation to the next. 11. scientist calls the chemical factors that determine traits ? . 12. mendel's second conclusion is the ? . 13. the principle of dominance states that some alleles are ? and others are ? . 14. when mendel allowed the f1 plants to reproduce by self-pollination the traits controlled by ? alleles reappeared in about ? of the f2 plants in each cross.