I have questions about these (bio 7th grade)
1. Why is Cuscuta categorised as a parasite?
2. A mutually beneficial relationship that occurs between two
plants. It is known by what name? Give an example.
3. For testing the presence of starch in leaves, a boiled leaf is
used. Why?
4. Wheat dough, if left in the open, after a few days, starts to
emit a foul smell and becomes unfit for use. Give a reason.
5. Observe the given figure and label the following terms.
Stomatal opening, guard cell.
Answers
1st ans:
the cuscuta plant is called parasite because it has no chlorophyll and absorbs food material from the host in this process the host is deprived of its valuable nutrients
2nd ans:
symbiosis:
the mutually beneficial relationship between two organisms is termed as symbiosis.
ex:
lichens are association between alga and fungi alga supplies food to its fungal partner,while fungi provides shelter to its algal partner
3rd ans:
the hot water the leaf and the alcohol breaks down the chlorophyll taking the green color out of the leaf when you put iodine on the leaves one of them will turn blue-black and the other will be a reddish-brown iodine is an indicator that turns blue-black in the presence of starch
4th ans:
when the wheat dough is kept in open for few days the formation of fungus and reproduction of yeast takes place these fungi and yeast will become unfit for eating or for use since the formation of fungus takes place in the dough it gives a foul smell
5th ans:
stomatal opening and closing guard cells:
this ans is top diagram
Answer:
I told check my previous question ok what are similes one