Question

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
Some animals shiver as a natural, involuntary response to their environment. Shivering generates heat. This is an example of which function?

reducing movement to regulate body temperature
reducing movement to regulate blood glucose
maintaining homeostasis by regulating body temperature
maintaining homeostasis by regulating blood glucose
Which is an advantage of flowering plants?
Flowers attract insects that transport gametes.
Flowers give greater access to sunlight.
Flowers help transport water and nutrients.
Flowers assist plants that live in the water.
Aristo was riding in a car and noticed a pond that was covered in algal blooms due to excess phosphorus in the water. Which of these other features in the landscape could be the reason for the high levels of phosphorus?
many cars
cow pasture
solar panels
forest
he overall population of a species decreased. What could have occurred to make this happen?
The immigration rate increased, while the death rate decreased.
The birth rate decreased, while the death rate increased.
The carrying capacity increased, while the immigration increased.
The emigration increased, while the birth rate increased.
The figures below refer to a herd of water buffalo.

Birth rate = 35
Death rate = 7
Immigration = 4
Emigration = 17

What is this population growth?
population increases by 41
population decreases by 15
population increases by 15
population decreases by 24
There is an algal bloom in a bay in a populated area. As the leading marine biologist in the area, what is the most important thing to do, based on scientific evidence about such blooms?
warn people about which food is safe to eat
develop a strategy to prevent future algal blooms
encourage people to go clean the affected area
evacuate all wildlife from the bay
Which is a requirement for natural selection to occur?
heritable variations for some traits
the ability of an organism to improve a trait during its lifetime
equal probability of survival for all offspring
fewer offspring than the environment can support
Which form of natural selection does the graph represent?

A graph has trait value on the horizontal axis and proportion of individuals on the vertical axis. The original population increases to a maximum point at the center, and then decreases. The population after selection increases, decreases, increases, and then decreases again. The maximum of the original population is the minimum of the population after selection.
directional selection
disruptive selection
sexual selection
stabilizing selection
Consider this microscopic image of bacteria.

A microscopic image of bacteria is shown. The bacteria is made up of 2 connected spherical shapes.
Which bacterial form is shown in the image?
bacillus
nucleoid
spirillum
coccus

Answer 1

1. observation
2. maintaining homeostasis by regulating body temperature
3. Flowers attract insects that transport gametes.
4. cow pasture
5. The birth rate decreased, while the death rate increased.
6. population increases by 15
7. develop a strategy to prevent future algal blooms
8. heritable variations for some traits
9. disruptive selection
10. coccus