Yes, if megaspore develops into embryo sac without meiotic division, egg will be diploid and also if an apomictic embryo develops from a cell of nucellus, it will be diploid.

The correct order of the reproductive events is Gametogenesis, pollination, fertilisation, embryogenesis.

Standing crop represents the total amount of living matter or organic matter present in an ecosystem in a unit area and at a specific time.

Calotropis produces highly poisonous cardiac glycosides that can make the herbivore sick and hence they are not grazed by goats and cattle.

Mosses and liverworts are unable to complete their sexual mode of reproduction in dry conditions due to following reasons:
i) Mosses and liverworts show internal fertilization.
ii) They produce non-motile female gametes and motile male gametes.
iii) they need water as the medium for transfer of male gametes to the female gametes.

Protease is added because it helps in digesting proteins and helps in the breakdown of cell wall by dissolving it.

The figure is of ginger. The vegetative part that helps it to propagate is rhizome.

The toxin responsible for symptoms of malaria is haemozoin. It is released when RBCs get ruptured due to erythrocytic schizogony of Plasmodium that takes place every 48 hrs.

Producers.

It is the condition of rest or summer sleep in a cool shady place during the hot dry period of the summer day.

Homoeostasis is the maintenance of the constant internal environmental of a body despite changes in the external environmental.

1. MTP is generally advised during first trimester of pregnancy as it becomes more and riskier as after this period fetus becomes more intimately associated with the uterine wall tissue.
2. Various methods of MTP require the help of qualified doctors.
3. To prevent illegal female foeticide.

Lead inactivates the catalyst.

International union for conservation of nature and natural resources.

It may not grow well because of chage in its microlimate.

Symbiosis.

The species are reproductivity isolated and do not interbreed in nature, so they are rare in nature.

- The same applies to intergeneric crosses too; the gametes show species specificity.

It does not induce any immunological responce

The ratio of offspring would be:

AaBb   :   Aabb   :   aaBb   :   aabb

   1             1             1            1

Both the parents must be heterozygous for tallness, i.e. Tt.

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.

(i) Amoeba and yeast are single-called organisms.
(ii) They have a relatively simple organ-isation of cells.

Stigma