Darwin’s finches are an excellent example of

• Adaptive Radiation

• Seasonal migration

• Brood parasitism

• Connecting links

The plant of Triticum aestivum is

• Haploid

• Diploid

• Tetraploid

• Hexaploid

Vascular tissues in flowering plants develop from

• Phellogen

• Plerome

• Periblem

• Dermatogen

Quantasome are present in

• Chloroplast

• Mitochondria

• Golgi body

• Lysosome

Nitrogen-fixation in root nodules of Alnus is brought about by

• Bradyrhizobium

• Clostridium

• Frankia

• Azorhizobium

During the propagation of a nerve impulse, the action potential results from the movement of

• K⁺ ions from extracellular fluid to intracellular fluid

• Na⁺ ions from intracellular fluid to extracellular fluid

• K⁺ ions from intracellular fluid to extracellular fluid

• Na⁺ ions from extracellular fluid to intracellular fluid

Green potatoes are toxic due to

• Phytoalexins

• Solanin

• Triazine

• Hormones

In mitochondria, enzyme cytochrome oxidase is present in

• Outer membrane

• Perimitochondrial space

• Inner Membrane

• Matrix

A mature pollen grain of Pinus has

• 2 cells

• 3 cells

• 4 cells

• 5 cells

In which one of the following, the male and female gametophytes don’t have free-living independent existence?

• Pteris

• Funaria

• Polytrichum

• Cedrus