Which of the following statements is true of yeast?

Which of the following statements is true of ginger?

Which of the following statements true of date plam?

Which of the following animal is having longitudinal binary fission?

vegitative propagation in mint occurs by 

Choose the correct statement from amongst the following:

The number of chromosomes in the shoot tip cells of a maize plant is 20. The number of chromosomes in the microscope mother cell of the same plant shall be:

What is common between vegetative reproduction and apomixis?

Which part would be most suitable for raising virus-free plants for micropropagation?

Banana is vegetatively propagated by

Why is a coconut plant reffered to as monoecious?

Cut pieces of a Bryophyllum leaf when put into wet soil produce new plants.  How?

Name the parts of the gynoecium which develop into fruit and seeds.

What is homogamy ?

What is double fertilization?

What is regeneration?

Meiosis generally occurs during gametogenesis in sexually reproducing organisms.Why?

Give a reason for the following:
i)The animals exhibiting external fertilization discharge large number of gametes.
ii)Marchantia is a dioecious plant.

In haploid organism that undergo sexual reproduction, name the stage in the life cycle when meiosis occurs.  Give reasons for your answer.

You must have seen your mother adding 3-4 globules of yeast to the idli paste she has prepared.  Similarly, brewing industry uses yeast in the manufacture of alcohol.
(a) How does such a small amount of yeast added help to produce thousands of litres of alcohol? Explain how yeast multiples so fast.
(b) Name the process carried out by yeast in these cases.
(c) What value is learnt from these?

Jagan has two mango trees in the backyard  of his house, which yielded fruits for the first time during this summer.  The fruits were small, fibrous and not so sweet.  In the next house, where his friend Ajay livers, there is a mango tree, which yields fruits that are fleshy/juicy, very sweet and bigger in size.  Ajay, a student of B.sc. (Botany) comes out with an idea and takes some branches from the jagan's garden to his garden and explains the procedure.
(a) What method do you think Ajay has suggested for getting good quality fruits, on the trees of Jagan's house in a short period of time, i.e. during the next season?
(b) Describe how it is carried out to help japan.
(c) What are its advantages over growing a mango tree with the seeds obtained from Ajay's garden?
(d) Mention the values expressed by Ajay in this case.