Answer:
1) limbs
2) Stegocephalia
3) 367.5 million years ago
4) Fishes
5) Fossils
6) 367.5 million years ago
7) Fishes
8) unearthed or preserved
The nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. Nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and DNA, the building blocks of all life .
At the molecular level, cells from different types of organisms vary in their tolerance to temperature and pH. This variation can mostly likely be attributed to the types of enzymes present in the cells.
- The tolerance ranges for abiotic environmental factors are similar to the geographic ranges that organisms have.
- To put it another way, they can tolerate (or survive in) a specific range of a given factor, but they cannot survive if the element is present in either an excessive or insufficient amount.
- Take temperature, for example. Polar bears thrive in cold climates but would perish in the tropics from excessive heat.
- Cells are incapable of acting as "liquid machinery" at temperatures below freezing and above boiling.
- The majority of cells, however, are still unable to function across the entire range of liquid temperatures.
- Variance in enzyme activity and protein denaturation are most closely related to variation in cells' capacity to vary in their tolerance to temperature, etc. at the molecular level in various animals.
learn more about temperature tolerance here: brainly.com/question/13492803
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Answer:
Sporozoa-flexing the pellicle
Explanation:
Sporozoa do not have flagella, cilia, or pseudopodia and they show gliding movement, amoeboids show movement by pseudopodia, ciliates by cilia and zooflagellates show by flagella, the pellicle is shown by paramecium.
So, the correct option is 'Sporozoa-flexing the pellicle'.
Answer:
The correct answer is metaphase.
Explanation:
During metaphase, the lining up of the chromosomes takes place at the metaphase plate, under the influence of the mitotic spindle. In each of the chromosomes, the sister chromatids are held together with the help of microtubules from the contrary spindle poles.
In metaphase, the spindle has captivated all the chromosomes and aligned them in the center of the cell, which is ready to differentiate.
