In which type of parthenogenesis are only males produced?

The mode of sexual reproduction in bacteria is by ______.

The mature sperms are stored in the ____.

The milk secreted by the mammary glands soon after child birth is called ______.

Assertion(A): Head of the sperm consists of acrosome and mitochondria.
Reason(R): Acrosome contains spiral rows of mitochondria.
Codes:
(a) A and R are true, R is the correct explanation of A.
(b) A and R are true, R is not the correct explanation of A.
(c)  A is true, R is false.
(d) Both A and R are false.

Select the incorrect action of hormonal contraceptive pills from the following

Klinefelters syndrome is characterized by a karyotype of ____.

E. coli cell grown on ¹⁵N medium are transferred to ¹⁴N medium and allowed to grow for two generations. DNA extracted from these cells is ultracentrifuged in a cesium chloride density gradient. What density distribution of DNA would you expect in this experiment?

Darwin’s finches are an excellent example of

Allergy involves

PCR proceeds in three distinct steps governed by temperature, they are in order of

Match the following and choose the correct combination from the options given below.

What type of human population is represented by the following age pyramid?

Which one of the following are at high risk extinction due to habitat destruction?

In Haplopappus gracilis, number of chromosomes in cells of nucellus is 4. What will be the chromosome number in Primary endosperm cell?

Compare point mutation with chromosomal mutation.

Given below are the gene sequences on the chromosome. Compare them with the normal chromosome and identify the type of structural chromosomal aberrations.
Normal Chromosome : A - B - C - D - E- F - G - H - I.
Chromosome 1 : A - B - C - B .C - D - E - F - G - H - I.
Chromosome 2 : A - B - C - D - F - G - H - I

Write an palindrome sequence of DNA.

Name any four vectors that you know?

What are polylinkers?

Write the composition of vitamins used in MS medium.

What does ELSI represents to?

Heliophytes differ from Sciophytes. How?

Compare Euryhaline organisms with stenohaline organisms.

Mention any four topographic factors that affect vegetation.

Define mutualism with an example

What is standing crop?

Compare Deforestation and Afforestation

Write the health benefits of Kodo millet.

Name the plant species used for making paper pulp.

Give reasons for the following:
(a) Some organisms like honey bees are called parthenogenetic animals
(b) A male honey bee has 16 chromosomes where as its female has 32 chromosomes

What is inhibin? State its functions

Define gametogenesis.

Why tRNA is called an adapter molecule?

What is vaccine? What are its types?

What are DNA vaccines?

One of the applications of biotechnology is ‘gene therapy” to treat a person born with a hereditary disease
i) What does “gene therapy” mean?
ii) Name the hereditary disease for which the first clinical gene therapy was used.
iii) Mention the steps involved in gene therapy to treat this disease.

What are the ways by which organisms respond to abiotic factors?

Why do we find a decrease in biodiversity distribution, if we move from the tropics towards the poles?

Why is biodiversity so important and worthy of protection?

List any two strategy adopted by bisexual flowers to prevent self-pollination.

Explain the law of dominance in monohybrid cross.

Explain the mechanism of crossing over.

What is vivipary? Name a plant group which exhibits vivipary.

Explain the best suited type followed by plant breeders at present?

How is juvenile phase different from reproductive phase?

The procedure of GIFT involves the transfer of female gametes into the fallopain tube, can gametes be transferred to the uterus to achieve the same result? Explain.

Open Book Assessment
‘Healthy reproduction, legally checked birth control measures and proper family planning programmes are essential for the survival of mankind’ Justify

Explain the mode of sex determination in honeybees.

Explain the inheritance of sex linked characters in human being.

How is the two stage process of protein synthesis advantageous?

Mention any three similarities found common in Neanderthal man and Homo sapiens.

(i) Write the scientific name of the filarial worm that causes filariasis.
(ii) Write the symptoms of filariasis.
(iii) How is this disease transmitted?

List the common withdrawal symptoms of drugs and alcohol abuse.

List the advantages of biogas plants in rural areas.

PCR is a useful tool for early diagnosis of an Infectious disease. Elaborate

Explain why cloning of Dolly, the sheep was such a major scientific breakthrough?

Give an account of the properties of soil.

In north eastern states, the jhum culture is a major threat to biodiversity – substantiate.

Write a note on
i) Protected areas,
ii) Wild life sanctuaries.