Question

can you answer these questions

Which best describes an adaptation that could be found in a fish that lives in a slow-flowing stream?

the ability to attract prey by glowing
extra gills, for oxygen extraction
the ability to grow larger
extra fat, for warmth

A biologist counts the number of zebras in a population each year, and notices an increase in the zebra population. Which describes the biologist’s actions?
graphing
inference
observation
interacting

Which type of process occurred in the ecosystem that was affected by the 1988 fires in Yellowstone Park, which destroyed most of the vegetation but left the soil intact?
primary succession
secondary succession
a climax community
species extinction

Hyenas and lions have fierce battles over food. Which type of relationship does this describe?
parasitism
commensalism
predation
competition

The graph shows the changing levels of hormones during menstruation and ovulation. What happens to hormone levels during ovulation, and why is this important?

A graph shows the changing levels of hormones during menstruation and ovulation. As an individual approaches ovulation, hormone levels increase.
The hormone levels increase to prepare a woman’s body to receive a fertilized egg.
The hormone levels decrease to prepare a woman’s body to receive a fertilized egg.
The hormone levels increase, and the next menstrual cycle begins with shedding of the uterine lining.
The hormone levels decrease, and the next menstrual cycle begins with shedding of the uterine lining.

Answer 1

1) Extra gills, for oxygen extraction.
- Slow-flowing water often has lower dissolved oxygen than fast-flowing water, so adaptations that increase oxygen uptake are beneficial.

2) Observation.
- Counting individuals and noting a change is collecting observational data.

3) Secondary succession.
- Vegetation was removed but soil remained, so the community regrows from existing soil and seed/buried propagule sources.

4) Competition.
- Hyenas and lions fighting over the same food resource is interspecific competition.

5) As an individual approaches ovulation, hormone levels increase — the hormone levels increase to prepare a woman’s body to receive a fertilized egg.
- Hormone surges (estrogen and LH) trigger ovulation and cause the uterine lining to thicken in preparation for possible implantation.