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nalin [4]
2 years ago
12

Identify the circumstances associated with increased rates of physical weathering. select two correct answers.

Biology
1 answer:
barxatty [35]2 years ago
4 0

Answer: freeze-thaw cycles and hot and cold cycles

Explanation:

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____ are the small sacs that are the site of gas exchange in the lungs
sertanlavr [38]

Answer:

alveoli

Explanation:

They are the smallest structures in our lungs where capillaries exchange O2 and CO2 in blood.

6 0
3 years ago
Why are protozoa significant? Select all that apply. Protozoa contaminate the water supply. Protozoa do not contribute to a food
Luba_88 [7]

Answer: Protozoa contaminate the water supply.

Some protozoa are parasites and cause diseases like malaria.

Protozoa have an important role in the food chain.

Protozoa are parasitic or free living single celled eukaryotic organisms. They are mostly found in water bodies.

Protozoa contaminate the water supply: Some of the protozoan species which are released from the human feces usually contaminate thee water, and causes waterborne infections in humans. Examples are Cryptosporium and Giardia. The infection occurs through drinking water or swallowing water from swimming pool.

Some protozoa are parasites and cause diseases like malaria: The Plasmodium is the genus belonging to the protozoan parasites. This malarial parasite is transmitted by female Anopheles mosquitoes to humans. The parasite multiply in the red blood cells causes symptoms like fever, anemia, flue, illness and may also cause coma and death.

Protozoa have an important role in the food chain: The protozoa species plays many roles in the food chain, they act as consumers, predators or prey, herbivores and decomposers. Their main function is to control the population of other species in the same habitat. They engulf small single celled bacteria, hence prevents excessive bacterial colonization act as predator. They also feed upon the algal species therefore, act as herbivores. They act as decomposers, as they feed upon the organic matter present in the bottom of the aquatic water body. They are the source of food for large worm and insect species.


5 0
3 years ago
Read 2 more answers
What is the longest stage of the cell cycle called
VMariaS [17]
Interphase, lasting 18 of the 20 hours cycle
4 0
2 years ago
Which of the following results from a mark-recapture study done on mice would reflect a larger population size? When taking the
Lubov Fominskaja [6]

Answer:

Option (3).

Explanation:

Mark recapture method is used for the estimation of population size of an area. The individuals are identified by  some mark on them. The formula of mark recapture method is

N = M * C/ R

Here, N is the number of the individuals, M is the individuals are marked and captured, C is the individual captured again with mark or non mark and R is recaptured marked individual.

The individual with 200 population, 20 are marked for the first time represent the large population size.

Thus, the correct answer is option (3).

6 0
3 years ago
Which of the following is not a way in which biomes can change?Which of the following is not a way in which biomes can change?
denpristay [2]
The answer is solar eclipses
5 0
3 years ago
Read 2 more answers
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