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White raven [17]
3 years ago
15

During which period did humans first appear on Earth? Quaternary Neogene Paleogene Cenozoic

Biology
1 answer:
pychu [463]3 years ago
7 0

ANSWER: Quaternary

just took the quiz on edge

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The Competitive Exclusion Principle states that: Group of answer choices a. When two species occur together, competition is alwa
Reika [66]

Answer:

b. Two species that use a limited resource in the same way cannot coexist indefinitely

Explanation:

The competitive exclusion principle establishes that two or more species that share the same niche requirements,  in the same habitat, and are in biological competition for the same resources, won´t be able to coexist indefinitely in the same space if the other ecological factors are constant. This is because species with identical niches have the same necessities, which means that they will compete for the same resources. If these species have the same requirements, they can not coexist. When the superior competitor occupies the inferior competitor´s fundamental niche, the first species has advantages over the second species and <em>monopolizes all the resources</em>. From that moment, the inferior species is displaced and must adapt to use other resources changing its behavior, or must migrate to another area where it can get access to its needs or get extinct.

When <em>two competing species coexist</em>, this is because of niche partitioning or niche differentiation. One of the species uses a <em>different resource, occupies another area, or uses the resources at different times during the day</em>. If there is not any differentiation between them, the dominant species displaces the weak species.

Niche specialization might produce genotypic separation. Subpopulations of a species diverge into new species.    

So, <em>competitive exclusion refers to the exclusion of the inferior competitor by the superior competitor when there is not habitat differentiation, and both species can not share the same niche.    </em>

4 0
3 years ago
Read 2 more answers
The resulting pain and inflammation when pleural fluid is unable to prevent friction between opposing pleural surfaces is known
Effectus [21]

Answer

The correct option is B.

Reason

            A brief technical explanation for each option is given below.

a. Asthma

                 It is lower respiratory disorder in which air passage way become narrow and swells, produce extra mucus which make difficulty in breathing, and trigger sneezing, wheezing and shortness of breath.

b. Pleurisy

                 It is lung disease in while pleura, lining of lung and chest cavity become inflamed due to accumulation of pleural fluid. The fluid is accumulated through the process of pleural effusion which may be transudate or exudate.

c. Pulmonary hypertension

                           It is a condition in which blood pressure increase in lung arteries. It leads to shortness of breath, swelling of legs and fast heartbeat.

d. COPD

               Stand for chronic obstructive pulmonary disorder. It is a progressive lung disorder accompanied with chronic bronchitis, emphysema and non-reversible asthma.  

e. Emphysema

                        In this type of lung disorder the alveoli block due to accumulation of fluid in it, that result into low exchange of gases (oxygen and carbon dioxide).  


6 0
3 years ago
Professional gardeners often soak seeds in hydrogen peroxide before planting them. Why?
prisoha [69]

Answer:

Professional gardeners often soak seeds in hydrogen peroxide before planting them in order to increase the germination percentage or to reduce germination failure. When the seeds are soaked in hydrogen peroxide, the seed coat becomes soft and enzymes present in the seed becomes active. Due to soaking of seeds, the seed takes less time to germinate. So that's why gardeners uses this method.

5 0
3 years ago
In the logistics growth curves, exponential growth is the phase in the population
Dafna1 [17]

grows more and more rapidly

7 0
4 years ago
What is the function of the Calvin cycle?
Alex_Xolod [135]

Answer:

it generates NADH for use in mitochondrial ATP production

5 0
3 years ago
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