Tectona grandis is coming under family _____.

Which one of the following are the species that are crossed to give sugarcane varieties with high sugar, high yield, thick stems and ability to grow in the sugarcane belt of North India?

Dwarfing gene of wheat is ______.

Importing better varieties and plants from outside and acclimatising them to local environment is called _____.

Match Column I with Column II

Column I	Column II
i) William S. Gaud	I) Heterosis
ii) Shull	II) Mutation breeding
iii) Cotton Mather	III) Green revolution
iv) Muller and Stadler	IV) Natural hybridization

The unit for measuring ozone thickness _____.

With respect to Eichhornia
Statement A: It drains off oxygen from water and is seen growing in standing water.
Statement B: It is an indigenous species of our country.

Ecosystem consists of ____.

Pond is a type of ______.

Which of the following is / are not a natural ecosystem?

The prevention of large scale loss of biological integrity ____.

Micro propagation involves _____.

Consider the following statements:
I. Recombinant DNA technology is popularly known as genetic engineering is a stream of biotechnology which deals with the manipulation of genetic materials by man invitro
II. pBR322 is the first artificial cloning vector developed in 1977 by Boliver and Rodriguez from E.coli plasmid
III. Restriction enzymes belongs to a class of enzymes called nucleases.
Choose the correct option regarding above statements

Genetic engineering is _____.

If haploid number in a cell is 18. The double monosomic and trisomic number will be _____.

The A and B genes are 10 cm apart on a chromosome. If an AB/ab heterozygote is testcrossed to ab/ab, how many of each progeny class would you expect out of 100 total progeny?

In Mendel’s experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F₂ generation of the cross RRYY x rryy?

Which one of the following is an example of polygenic inheritance?

How many different kinds of gametes will be produced by a plant having the genotype AABbCC?

Size of pollen grain in Myosotis ______.

Pollen tube was discovered by ______.

Identify the correctly matched pair.

An eminent Indian embryologist is ______.

Choose the correct statement from the following