answer:
we can't pollute water because there are creatures and organisims that live in the water so if we pollute it then they will die, besides you can filter the water to get rid of salt then you're able to drink the water and also use it for many other purposes.
A cell wall is a structural layer that surrounds some types of cells, situated outside the cell membrane. It can be tough, flexible, and sometimes rigid. It provides cells with both structural support and protection, and also acts as a filtering mechanism. Cell walls are present in plants, fungi and prokaryotic cells, where a major function is to act as pressure vessels, preventing over-expansion when water enters the cells. Cell walls are absent from mycoplasmas.
Answer:
Ferns do not have true leaves as many plants do, but structures called fronds. These fronds are split down into leaflets called pinnae. These fronds are green and the fern gets its food via photosynthesis. Ferns reproduce by spores in an alternating generations.
Explanation:
i studied ferns for years
Answer:
In short, weather is to describe the day or week (short period). . As for the climate, it is to describe the year or (a long period), for example, the climate of the winter season is cold.
Answer:
Fossil record
Explanation:
Fossil record provides historical data documented by fossils, remains of organisms from earlier geological period that have been kept or preserved in rooks.
Morphology is the study of the shape or structure of a thing.
Radiometric data is the use of gamma rays to date rocks or carbon.
From the definitions above, only fossil records can be used to calibrate the clock, by providing information about lineage divergence, from fossils.
