4. Since morning the whole day it rained. Sun was not visible at all. But photosynthesis took place in plants. What do you think happened in plant? Explain you answers with logical reasoning in your own words

Answer is below.

Explanation:

Photosynthesis is a process that involves three main actors (or ingredients); sunlight, water, carbon dioxide.

Statistics has it that there was no sunlight all through the day.

- Let's check then if there was availability of water and the gas carbon dioxide.

There was rainfall all day

- This means that some photosynthetic activity would take place.

What about the gas that plants breathe in?

- There is always substantial amount of CO₂ in the atmosphere.

A SECOND WAY TO LOOK AT IT IS:

by checking the two stages of photosynthesis.

- In the first stage, sunlight is the main actor. Sunlight is trapped and stored as energy in the chloroplasts of green plants.

- In the second stage, CO₂ is the main actor. With CO₂, the chemical compound - from the first stage - ATP is used to produce sugar and organic compounds which are the food of/for green plants.

i think the answer is a.keratin is the pigment responsible for skin color.