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crimeas [40]
3 years ago
9

22. What part of its life cycle is our sun in?

Biology
1 answer:
Artyom0805 [142]3 years ago
8 0

Answer:

The Sun, like most stars in the Universe, is on the main sequence stage of its life, during which nuclear fusion reactions in its core fuse hydrogen into helium. Every second, 600 million tons of matter are converted into neutrinos, solar radiation, and roughly 4 x 1027 Watts of energy

Explanation:

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1. Which of the following is the process of reproducing or creating a new plant or
Yanka [14]

Answer:

plant propagation

Explanation:

Plant propagation is the process which grows new plants from a variety of sources: seeds, cuttings, and other plant parts. Plant propagation can also refer to the man-made or natural dispersal of seeds.

4 0
3 years ago
Several fish species became extinct millions of years ago. The graphs provided below show the distribution of fossils of these f
cestrela7 [59]
1. Explain why the distribution of fossils in Figure 1 supports the hypothesis that the extinction of these species was the result of a sudden environmental change.
This hypothesis can be supported because all the fossils accumulate almost at the same age of the rock layer. That is, all the fossils died almost at the same time.

2. Describe an environmental change that could have produced this type of fossil distribution.
Good examples of sudden environmental changes are volcanoes. When a rash occurs, the whole environment suddenly changes for different reasons such as ash or lava, and all living things can die immediately or in a few years by the change in the ecosystem.

3. Explain why the distribution of fossils in Figure 2 supports the hypothesis that the extinction of these species was the result of a gradual environmental change.
This is because the fossils accumulate at different ages of the rock layer, that means, the species dying over time. The gradual descent of the fossils is observed.

4. Describe an environmental change that could produce this type of fossil distribution.
For example, if a climate change occurs - the temperature increases or decreases - it can cause the trees or plants to die and all the animals in the ecosystem also die when they have no food. But this process is sequential, so the change can take years, centuries or even millions of years.

I hope this can help you.
4 0
3 years ago
The alveoli in the lungs have very thin surface membranes which are often made out of a single layer of cells. The alveoli in th
leonid [27]
The answer would be C. gases 
5 0
3 years ago
Which of these is the reasons organisms perform photosynthesis?
IrinaVladis [17]

Answer:

Plants perform photosynthesis to produce glucose.

Explanation:

Glucose is used by plants for energy and to make other substances like cellulose and starch.

5 0
3 years ago
Read 2 more answers
The answer is gravitropism in case you guys are wondering
Irina18 [472]
Nobody was wondering
6 0
2 years ago
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