The year 1900 AD is highly significant for geneticists due to

• Discovery of genes

• Principle of linkage

• Chromosome theory of heredity

• Rediscovery of Mendelism

F1-generation means

• First filial generation

• First seed generation

•  First flowering generation

• First fertile generation

43.

Which of the following cross will produce terminal flower in garden pea?

• AA x Aa

• AA x aa

• Aa x Aa

• Aa x AA

Which one of the following pairs of plants are not seed producers?

• Funaria and Ficus

• Fern and Funaria

• Funada and Pinus

• Ficus and Chlamydomonas

Study the following statements and select the correct option.

I. Tapetum nourishes the developing pollen grains.
II. Hilum represents the junction between ovule and funicle.
III. In aquatic plants such as water hyacinth and water lily, pollination is by water.
IV. The primary endosperm nucleus is triploid.

• I, II, and IV are correct, but III is incorrect

• I and II are correct, but III and IV are incorrect

• I and IV are correct, but II and III are incorrect

•  I, Ill and IV are correct, but I is incorrect

Masses of pollen grains, i.e., pollinia is found in

• Gramineae

• Solanaceae

• Orchidaceae

• Malvaceae

Morphine, which is used as an analgesic is obtained from

• Taxusbrevifolia

• Berberisnilghiriensis

• Cinchona officinalis

• Pa paver somniferum

Darwin’s finches are an excellent example of

• Adaptive Radiation

• Seasonal migration

• Brood parasitism

• Connecting links

Vascular tissues in flowering plants develop from

• Phellogen

• Plerome

• Periblem

• Dermatogen

A mature pollen grain of Pinus has

• 2 cells

• 3 cells

• 4 cells

• 5 cells