Which of the following statements is true of yeast?

Female heterogamy is found in

Which of the following walked like gorillas and chimpanzees?

Name an external medium that helps in gamete transfer.

Which of the following diseases can be avoided in the progeny by analysing the pedigree of the parents?
Turner's suydrome, colour blindness, tuberculosis.

What are the raw materials for DNA synthesis?

Starting with the oldest form rearrange the following genera species according to their sequence of appearance on earth:
Homo erectus, Homo sapiens, Ramapithecus, Homo habilis, Australopithecus.

Give the name of one causative organism of the filariasis disease.

Write significance of meiocytes.

Even though each pollen grain has two male gametes, why are at least 10 pollen grains and not 5 pollen grains required to fertilise 10 ovules present in a particular carpel?

At the time of Independence the population of India was 350 million which exploded to over one billion by May 2000. List any two reasons for the rice in population and any two steps taken by the government to check this population ecplosion.

Define the following terms:
(i) Heterokaryon
(ii) Tumour
(iii) Somatic hybridization.

(a) In which part of the humaa female reproductive system do the following events take place?
I    - Release of 1st polar body.
II   - Release of 2nd polar body.
III  - Fertilisation
IV  - Implantation
(b) From where do signals for partuirition originate and what does maternal pituitary release for stimulating uterine contractions for child birth?

What is meant by withdrawal syndrome? What are its characteristic features?

Why is the 'insertional inactivation' method to detect recombinant DNA preferred to 'antibiotic resistance' procedure?

In a pond, we see plants which are free-floating; rotted -submerged; rooted emergent; rooted with floating leaves.Write the type of plant against each of them.

Many plant and animal species are on the verge of their extinction because of loss of forest land by indiscriminate use by the humans. As a biology students what method would you suggest along with its advantages that can protect such threatened species from getting extinct?

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.

(a) Draw a labelled diagram of L.S. of an embryo of grass (any six labels).
(b) Give reason for each of the following:
(i) Anthers of angiosperm flowers are described as dithecous.
(ii) Hybrid seeds have to be produced year after year.

Describe the specific action of FSH, LH, oestrogen and progesterone in the menstrual cycle.

Reproductive and Child Healthcare (RCH) programmes are currently in operation. One of the major tasks of these programmes is to create awareness amongst people about the wide range of reproduction related aspects.As this is important and essential for building a reproductive health society.
(a) "Providing sex education in schools in one of the ways to meet this goal". Give four points in support of your opinion regarding this statement BSC
(b) List any two indicators that include a reproductively society.