Pure line breed refers to

• heterozygosity only

• heterozygosity and linkage

• homozygosity only

• homozygosity and self assortment

Which of the following is involved in allergic reaction?

• lgM

• IgM and lgG

• IgA

• lgE

If a homozygous red flowered plant is crossed with a homozygous white flowered plant, the offspring would be

• half red-flowered

• all red-flowered

• half white-flowered

• half pink-flowered.

When the filament runs throughout the length of anther, it is called

• adnate

• dorsi fixed

• versatile

• syngenesious

Xenia and metaxenia terms are related with

• pollen culture

• xylem and phloem

• endosperm

• embryo

Green muffler is used against which type of pollution ?

• Air

• Soil

• Water

• Noise

Megasporophyll of Cycas has the same nature as

• stamen

• petal

• sepal

• carpel

Elater mechanism for seed dispersal is exhibited by

• Riccia

• Dryopteris

• Funaria

• Marchantia

Adults of Wuchereria bancrofti attacks

• excretory system

• nervous system

• digestive system

• lymphatic system

Introduction of foreign genes for improving genotype is

• biotechnology

• vernalization

• tissue culture

• genetic engineering