Answer:
Secondary succession generally occurs at the places where there was a previously established ecosystem.
The ecosystem that is destroyed due to some human activities or some natural disasters such as forest fire, flood et cetera.
This leads to the secondary succession where there was pressence of an ecosystem sometime before.
than others. (SB1a)
A. The cells divide more frequently.
B. The cells use more energy.
C. The cells store more nutrients.
D. The cells degrade more proteins.
Some cells have more mitochondria because the cells use more energy. The correct option is B.
Mitochondria are the powerhouse of the cell. It is a long cylindrical organelle. Some cells contain more mitochondria than others because they require more energy. The mitochondria store energy for the function of the cell.
So, for example, the muscle contains a lot of mitochondria, as does the liver, the kidney, and, to some extent, the brain, which runs on the energy that those mitochondria make.
Depending on the function of thecell, several mitochondria are frequently found in one cell. Mitochondria, like other organelles, are found in the cytoplasm of cells.
Therefore, the correct option is B. The cells use more energy.
To learn more about mitochondria, refer to the link:
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✓ B) The cells use more energy.
Some cells such as human nerve and muscle cells.
b. carbon dioxide
c. chitin
The correct answer is a - silicon dioxide.
Diatoms are single celled algae. They have a silica - based cell wall called a frustule, which gives each diatom a particular shape.
Diatoms exist as separate single cells although some may be found in groups or colonies. The ones found in colonies create very pretty forms: leaf shaped, oval , star and even like a period.
Outer shells of diatoms are quite valuable. They are used in industry in the manufacture of toothpaste to give it grit.
Answer:
Diatoms have cell walls composed of silicon dioxide.
tricuspid valve
mitral valve
The mitral valve prevents a backflow of blood into the left atrium. It closes when the heart contracts, preventing blood from flowing back. Other valves like the aortic and tricuspid have different functions.
The mitral valve, also known as the bicuspid valve, is the valve that prevents a backflow of blood into the left atrium. This valve is located between the left atrium and the left ventricle. When the heart contracts, the mitral valve closes, preventing blood from flowing back into the atrium. The other valves listed, the aortic valve and the tricuspid valve, have different functions. The aortic valve controls blood flow from the left ventricle into the aorta, and the tricuspid valve prevents backflow of blood into the right atrium.
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Correct answer: False
Invasive species are those species, which lower the biodiversity to a such an extent that they can create monotypic community.
Invasive species can be any type of living organism like plant, insect, fungus, fish, bacteria or seeds of the organism or eggs that are not native to an ecosystem and can cause a great harm to the ecosystem, economy, health, and the environment too.