1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ch4aika [34]
3 years ago
8

A hawk building its nest on an arm of a saguaro cactus is a sign of?

Biology
1 answer:
daser333 [38]3 years ago
8 0
B

This because the cactus now has mutual partnership with the hawk. The hawk gains protection of its nest because of the thorns on the cactus, and the cactus can benefit by the hawk and its young defacating near the cactus and on it to provide nutrients and act as a form of fertilizer
You might be interested in
A male cardinal's red color is an example of a trait affected by natural selection. The females of the species choose mates
kompoz [17]

Answer:

In the cardinals, if the females start using a different criterion than the color of the feather when they choose couple, most likely to happen is that decreased variation in the shades of red because no form of the trait is advantageous.

Explanation:

Options for this question are:

  • <em>Increased variation in the shades of red because the selection pressure has been relieved.</em>
  • <em>Increased variation in the shades of red because the cardinals try different ways to impress the females.</em>
  • <em>Decreased variation in the shades of red because no form of the trait is advantageous.</em>
  • <em>Decreased variation in the shades of red because the only reason for variation was selection pressure.</em>

In the context of natural selection, male cardinals court females using the coloring of their feathers as a form of sexual selection. This means that the shades of red in the feathers are a selection criterion in these birds, and the more visible shades represent an advantage.

But, if the selection criterion was not the color of the feathers, this trait would no longer represent an advantage in the competition between the males to be chosen as a mate. Instead, the trait that would determine sexual selection would be the one that experiences an increase in its variation<em>.</em>

5 0
3 years ago
In order to prevent bacteria and fungi from reducing the volume of organic matter, coal must experience ____, ____ burial.
Lostsunrise [7]
In order to prevent bacteria and fungi from reducing the volume of organic matter, coal must experience rapid, anaerobic burial.
5 0
3 years ago
Please help me i don’t understand
Eddi Din [679]
1. Biogeography, the study of the geographic distribution of plants, animals, and other forms of life. It is concerned not only with habitation patterns but also with the factors responsible for variations in distribution.

2. weathering and other natural forces break down the substrate, rock, enough for the establishment of certain hearty plants and lichens with few soil requirements, known as pioneer species. These species help to further break down the mineral-rich lava into soil where other, less hardy species can grow and eventually replace the pioneer species. In addition, as these early species grow and die, they add to an ever-growing layer of decomposing organic material and contribute to soil formation. This process repeats multiple times during succession. At each stage, new species move into an area, often due to changes to the environment made by the preceding species, and may replace their predecessors. At some point, the community may reach a relatively stable state and stop changing in composition. However, it's unclear if there is always—or even usually—a stable endpoint to succession.

3. I don’t have the video so I’m going to take. Wild guess. Just look up types of finches

4. Broadly speaking, different species are unable to interbreed and produce healthy, fertile offspring due to barriers called mechanisms of reproductive isolation.
These barriers can be split into two categories based on when they act: prezygotic and postzygotic.

I tried my best hope this helps :)
6 0
3 years ago
What three traits are used to classify organisms?
Bas_tet [7]

Answer:

Characteristics such as appearance, reproduction, mobility, and functionality are just a few ways in which living organisms are grouped together. These specialized groups are collectively called the classification of living things.

8 0
3 years ago
HELP FAST ASAP PLEASE
zzz [600]
The answer would be letter a
4 0
3 years ago
Other questions:
  • A strand of DNA contains the bases adenine, cytosine, cytosine, and guanine, in that order. What would be the order of the bases
    10·1 answer
  • Which of the following is a product of photosynthesis?
    7·2 answers
  • The measure weight of an object is slightly less at the equator than it is at the poles because of earth's
    13·1 answer
  • An _____ is a scientist who might study of bones found in an old grave.
    11·2 answers
  • What would happen to the climate if if the tilt of earth increased slightly?
    5·1 answer
  • Which is a characteristic of all ions?
    9·2 answers
  • All of these are natural events that could alter an ecosystem EXCEPT -
    6·1 answer
  • How garbage affects everyday life
    6·1 answer
  • 3.At high altitudes, air is less dense than at sea level because of decreased air pressure. This means that
    15·1 answer
  • If the deer population is reduced which of the following organims will be affected by the reduction in the amount of energy prov
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!