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gizmo_the_mogwai [7]
2 years ago
15

Which statement best describes a keystone species

Biology
2 answers:
GuDViN [60]2 years ago
6 0

Answer:

Option D,  it has a strong influence on the ecosystem

Explanation:

Keystone species are an essential part of an ecosystem and their functions/mark cannot be replaced by any other organism. Once the keystone species is removed from an ecosystem, the ecosystem struggles to sustain  or it changes radically. A keystone species in majority of ecosystems/food web is a predator but this is not true in all ecosystems/or with all keystone species.  

For example – there was a trophic cascade when the Gray wolves in the greater Yellowstone ecosystem were removed.  

professor190 [17]2 years ago
5 0

The answer is D

One way to remember this is when you are building a bridge there is one piece right in the middle that keeps the whole thing from collapsing that is called the key-stone. If a keystone species goes extinct then the rest of the ecosystem will crumble around it.

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What is cross-pollination?
torisob [31]
The answer is B. Cross-pollination occurs when pollen fertilizes female egg cells on the same flower.
4 0
3 years ago
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Classification Activity Worksheet Instructions: Read each myth (untruth). Reword it to make a factual statement. Then, give two
NeX [460]

Answer:

I don't think there is a #6, so I'm gonna answer the "Mammals and plants don't belong in the same domain".. If this is the wrong one I can help with the one you actually need help with.

Explanation:

Myth: Mammals and plants don't belong in the same domain. 

Fact: Mammals, being a group of animals do not belong in the same domain as plants. Evidence: All living organisms are divided into three domains: Bacteria, Archaea and Eukarya. All of the organisms that possess a eukaryotic cell, plants, animals, protists, and fungi are in the Eukarya domain. Therefore, mammals and plants belong to the same domain, the Eukarya domain.

6 0
3 years ago
One of the reasons bacteria can be so deadly is because they multiply very quickly. E. coli has a doubling time of around 15 min
Travka [436]

Answer:

The correct answer is - 25600 bacteria.

Explanation:

Bacteria can divide and produce double their population very quickly. As mentioned in the question bacteria multiply every 15 minutes to their double number. Finding the number of bacteria after 2 hours is simple mathematics. Two hours means 120 minutes and dividing it to 15. The result will be 8 which mean the bacteria double their colony 8 time so,

100×2 to the power 8 = 100 (initial number of bacteria)×2×2×2×2×2×2×2×2= 25600

Thus, the correct answer is option- 25600 bacteria.

6 0
3 years ago
In the peppered moth scenarios what is the variation? And the selection?
Morgarella [4.7K]

Variation is number of alleles for the wing color of the peppered moths. The wing color ranges from pure white to pure back.

Selection pressure is predation by birds.

Explanation:

In the wake of the industrial revolution, white-winged peppered moths had a large allelic frequency in the population compared to black-winged peppered moths. However, when the environment changed due to soot produced by industries (making the environment darker) white-winged peppered moths reduced while that of black moths increased.

This is because black moths were able to blend in and camouflage in the dark environment than white-winged peppered moths that stood out to their predators. Black moths, therefore, had an increased chance of reaching adulthood and passing their genes to the next generation. This increased the allelic frequency of black-winged peppered while that of white-winged moths reduced in the population.

Learn More:

For more on natural selection of peppered moths check out;

brainly.com/question/12918325

brainly.com/question/9231156

#LearnWithBrainly

8 0
3 years ago
What animal that has a similarity of humans reproduction, and its difference.
wlad13 [49]

Answer:

Chimpanzees has a similarity of humans reproduction, and its difference is explained below in details.

Explanation:

Researchers discovered back in 2006 that chimpanzees experience around 98.4 and 99 percent of our DNA. They're more like to people than they are to gorillas! There are several similarities between animals and humans that you may have remarked. Humans and animals both feed, relax, imagine, and interact. We are also related in a lot of the means our bodies work.

4 0
2 years ago
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