Question

please answer this now . science class 9 don't spam otherwise it will be reported...​

Answer 1

1. The cell was discovered by Robert Hooke. He observed the cells in thin slices of cork.

Answer 2

Answer:

who discovered cells and how

Robert Hooke

The first time the word cell was used to refer to these tiny units of life was in 1665 by a British scientist named Robert Hooke. Hooke was one of the earliest scientists to study living things under a microscope.

why cell is called the structural and functional unit of life

The cell is called the structural and functional unit of life as all living organisms are made up of cells. ... Furthermore, cells provide form and structure, process nutrients and convert it into useable energy. Multicellular organisms have specialized cells that perform specific functions.

how do substances like cow and water move in and out of the cell discuss

lAnswer: The substances like CO2 and water move in and out of a cell by diffusion from the region of high concentration to low concentration. When the concentration of CO2 and water is higher in external environment than that inside the cell, CO2 and water moves inside the cell

why the plasma membrane is called a selectively premeable membrane

The plasma membrane is called a selectively permeable membrane as it permits the movement of only certain molecules in and out of the cells. ... If plasma membrane ruptures or breaks down then molecules of some substances will freely move in and out of the cells.

why are lysosomes known as suicide bags

It was supposed that if the organelle membrane could be disrupted inside the cell, hydrolases would have access to cytosol with as a result a dramatic degradation of vital components leading to cell death. That led to the concept of lysosomes as “suicide bags

make a comparison and write down the ways in which plant cells are different from animal cells

Plant Cell Animal Cell

1. They are larger in size.

1. They are smaller in size.

2. Cell wall is present.

2. Cell wall is absent.

3. Lysosomes are absent or very few in number

3. Lysosomes are larger in number.

4. Plastids are present.

4. Plastids are absent.

5. Subunits of Golgi bodies known as dictyosomes are present.

5. Prominent Golgi bodies are present.

6. Vacuoles are larger in size.

6. Vacuoles are smaller in size.

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