Anther.

Binary fission and budding in single celled organisms.

Smoking leads to increases in the carbon monoxide (C0) content in the blood. which reduces the oxygen carrying capacity of haemoglobin.Hence, tobacco smoking leads to oxygen deficiency in the human body.

Cow dung contains
(i) Celluosic materials and 
(ii) Methanoges, i.e, the raw material and the microbes needed for production of biogas.

The mortality rate would have increased due to various bacterial diseases which are otherwise controlled by antibiotics.

Cellulase is used to digest the cell wall (cellulose) of plant cells; animal cell have no cell wall and hence, it is not needed.

Green algae or plants are not found beyond a certain depth, as light (not all colour components of visible spectrum) is not available

1. Plant cells retain the power of division for comparavely longer periods than animal cells.
2. Animal cells become mature just after the embryonic stage and hence cannot be cultured.

It does not induce any immunological responce

Polypeptide chain synthesis will stop as UAG is a stop codon

(i) They are analogous organs, which perform similar functions.
(ii) Analogous organs are the result of convergent evolution.

Eighteen autosomes.

Though a gene exists in more than two allelic forms, in multiple allelism, a person can have only two of those alleles, because an individual has only two sets of homologous chromosomes, so multiple allelism can be studied only in a population.

The whiptail lizard/turkey shows parthe-nogenesis, the phenomenon which the female gamete undergoes development without fertilisation into adult.

VV and vv

An annual plant will have a shorter juvenile phase.
Since an annual plant completes its entire life cycle within a season, it has a shorter juvenile phase.

1.Meiosis occurs during gametogenesis;it leads to reduction in  the number of chromosomes and haploid (n) gametes are formed.
2.During fertilisation,when two haploid gametes fuse,a diploid (2n) zygote is formed.

The plant is dioecious; the plants which produce only male flowers, do not bear fruits, while the plants which produce female flowers, bear fruits.

The long tassels of corn cob are the styles and stigmas. They are meant to easily trap the air-borne pollen grains.

The pollen grains of Vallisneria are released into water; the mucilaginous covering protects them from wetting the consequent decay.

Papaya plants are dioecious as an individual plant bears exclusively either staminate flowers or pistillate flowers.

Banana produces fruits without fertilization of ovary; the process is known as parthenocarpy.
Since, parthenocarpic fruits are seedless, banana is propagated by vegetative means.

Banana fruit develops without fertilisation of the ovary; hence it is considered parthenocarpic.

36 chromosomes.