The role of a keystone species is..
A. To kill off invasive species in the area
B. To maintain biodiversity in the ecosystem through complex interactions with other animals in the area
C. To be able to make the environment safe

Answer:

The answer is B

Explanation:

A keystone species is an organism that helps define an entire ecosystem. Without its keystone species, the ecosystem would be dramatically different or cease to exist altogether. The ecosystem would be forced to radically change, allowing new and possibly invasive species to populate the habitat.

How are the ear and the eye alike? How are they different?

Are the eyelid muscles voluntary or involuntary?

When is the Northern Hemisphere tilted away from the sun?
September
December
June
March

how can a predator prey relationship cause coevolution

Tell me some thing you learned in honors biology.

What should I study to get to know more about it ?

(I will mark brainliest! <3)

If a father has the genotype DD and a mother has the genotype dd, what would be the child’s genotype

Match each of the five levels of organization to their proper definition.


a group of tissues that work together to perform specific activities for an organism

a group of cells that are similar in structure and function

a living thing that carries out the processes of life

the basic unit of life for all organisms

a group of organs that work together to perform specific activities for an organism

(No links)
Why is the element carbon so versatile? A. Carbon is an extremely small element,
B. Carbon can change the number of electrons that it contains,
C. Carbon has the ability to form many different types of structures and is very stable,​

Match the definition to the cell structure

All genes come in pairs called __________.

during the process of dna replication what would the complimentary strand of the following dna sequence CTA GGT
HELP PLZ!!

There are more different types of species found in a population than there are in a community.
True
False

Which kingdoms make their own food?


No links. Marking brainlest to whoever gives me a correct answer!

A can of antifreeze spills near a clump of Dryopteris dilatata, a type of fern. The chemical seeps into the ground, endangering the plant's roots. The plant roots grow as far away from the chemical as possible to absorb only fresh water and minerals.
During this process, the roots primarily work in conjunction with which system? a) The immune system to defend against the toxic chemicals
b) The vascular system to reduce the absorption and transport of toxic chemicals
c) The reproductive system to make more root cells
d) The digestive system to create enzymes that break down the toxic chemicals​

Three molecules of calcium metal and one molecule of nitrogen gas react to form one molecule of solid calcium nitride.

Write the equation

Which block has the lowest density?

Read the paragraph then answer the question:

(1) The coral reef is a beautiful underwater landscape. (2) Coral is a actually a type of animal made of polyps that filter feed off small plants and microscopic animals that float through the current. (3) Many other animals live here as well including turtles, sharks, and 1,000s of types of fish. (4) The coral can be hurt by too much carbon dioxide being dissolved in the water from the air above. (5) If the coral dies, the reef becomes bare rock and sand no longer full of life.

Which sentence above BEST shows how the atmosphere is a part of the coral reef?


(2) Coral is a actually a type of animal made of polyps that filter feed off small plants and microscopic animals that float through the current.


(3) Many other animals live here as well including turtles, sharks, and 1,000s of types of fish.


(4) The coral can be hurt by too much carbon dioxide being dissolved in the water from the air above.


(5) If the coral dies, the reef becomes bare rock and sand no longer full of life.

The picture below shows some features of the ocean floor. (1 point)

At which of these locations does the ocean floor spread apart to form new oceanic crusts?
Location A
Location B
Location C
Location D

What releases oxygen into the atmosphere?​

Polar bears live in the tundra. They obtain their energy almost exclusively from eating other animals, although they do eat some vegetation. Black bears that live in temperate forests tend to be more omnivorous, eating a wide variety of plants and animals for energy.

An adaptation is a behavior or an anatomical structure that can help an organism survive in its environment. Why are diet choices important adaptations for these animals’ survival in their biomes? Based on the images, what other adaptations do these animals display?

A science class is doing an experiment on how light affects the growth of plants. One set of plants is placed under a special light, a second set
of plants is placed in the dark. A third set of plants is left under normal room lights. The class measures and charts each plant's growth for a
week.
In this experiment, the third set of plants that was placed under normal room lights would be identified as the

In the 3rd line of defense blood vessels expand,
phagocytic cells travel to the site of infection and fever
is produced to slow the growth of pathogens.

True or false

Which type of mutation is pictured?

(Picture has answer) Sediments that are deposited by wave action are?

2. Which systems (2) are directly involved in the digestions (mechanical and
chemical) of food?
3.
Which systems (2) control responses to internal and external environments?

Did the T. Rex have an amniotic egg?

Question 15 options:

Probably not because there is no history of closely related animals having an amniotic egg.


It is quite likely because lots of animals in the past have had amniotic eggs, so the T. Rex probably did too.


It is quite likely because both the caiman and parrot have an amniotic egg and they share a recent common ancestor with the T. Rex


Probably not because the T. Rex is no longer living.

Explain how a single base mutation can encode a protein that has many missing amino acids.

Read the excerpt from How Hurricanes Form.

Hurricanes are often compared to engines. Just like engines, they need a type of fuel. Hurricanes form over warm ocean waters near the equator. For hurricanes, their fuel is warm, moist air. When hurricanes form, the warm, moist air above the ocean rises upward from close to the surface of the water. Because the warm air rises, it results in less air under the surface of the water. This area with less air is known as an area with low pressure.

Air from areas surrounding this low pressure space pushes in to the area. This fills the low pressure area. The new air in this space becomes warm and moist and also rises. As the air continues to rise, the air surrounding the space swirls in to take its place. This process of air swirling in to replace air that has risen continues. Eventually, the moisture in the air forms clouds.

The wind and the clouds that form create a system. A system is a pattern of weather. The system of clouds and winds continues to spin and grow. The water evaporating from the ocean's warm surface acts as the fuel, which is what helps this spinning and growing. The system rotates faster and faster until the eye of the storm forms in the center area. Ironically, the eye of the storm is the calmest part, and it has very low air pressure. The higher pressure above the hurricane continually flows down into the eye.

Select the detail from the excerpt that supports the main idea of this part of the article. (2 points)

a
Hurricanes are often compared to engines.

b
The eye of the storm is the calmest part of the storm and has very low air pressure.

c
The water evaporating from the ocean's warm surface acts as the fuel.

d
This process of air swirling in to replace air that has risen continues.

which of the following capture energy by photosynthesis?

PLSS ANSWER THANKS <3
The shoulder & hip are examples of what kind of joint?