The questions are on the image

9 no. ans = 1. plastids.

2. cell wall.

10 no. ans

i)= nerve cell helps the body to receive impulse from affected part brain and response from brain to affected part.

ii)= palisade helps plants to carry out photosynthesis efficiently.

iii)= root hair cell helps in absorption of minerals ion and water from root to other parts of plant.

iv) = red blood cell helps in transporting oxygen to different parts of body.

11 no. ans

12 no.ans

i) = the group of cells having similar function and structures is called tissue.

ii)= organs are the group of various tissue working together to perform a particular task .

iii)= thecollection of organ which works or function independently is called organ system.

hope it helps..

9. There are chloroplasts in a plant cell but not in animal cells. (plants need chloroplast for photosynthesis)

There is a cell wall around a plant cell (that gives it a fixed shape) but animal cells don't have any cell walls.

10. i-  Nerve cells transmit and process information.

ii- palisade cells allow photosynthesis to take place. They contain numerous chloroplasts which help in absorbing light energy.

iii- The role of root hair cell is to absorb mineral salts and water from the soil.

iv- red blood cells help transport oxygen across the body.

11. divide the number of cells by the diameter of field view.

   10 cells/3.5 mm = 2.86 mm/cell

12. i-a tissue is a group of similar cells (which work together to perform a certain function)

ii- An organ is made of a few types of tissues that work together to perform a specific function. (e.g the stomach)

iii- several organs working together for a common purpose makes an organ system. (e.g the respiratory system or the digestive system)

the index of refraction of the second medium is higher. i just took the test trust me !