61.

Expanded green stem of Opuntia is called

• phylloclade

• tendril

• bulb

• cladode

Human ancestors who left cave paintings were

• Neanderthal man

• Cro- magnon man

• Java ape man

• Peking man

Bull semen is stored in

• liquid carbon dioxide

• liquid oxygen

• liquid nitrogen

• ice

Pneumatic bones are expected to be found in

• house lizard

• flying fish

• pigeon

• tadpole of frog

A man of blood group- A marries a woman of blood group- AB, which type of progeny would indicate that man is heterozygous?

• O

• B

• A

• AB

Balbiani rings are the structural features of

• allosomes

• polytene chromosomes

• autosomes

• lampbrush chromosomes

How many sperm cells are present in an average (3 mL) ejaculation?

• 200 million

• 300 million

• 400 million

• 500 million

The permanent decrease in population number occurs due to

• migration

• natality

• emigration

• mortality

Which of the following is not a vestigial structure in Homo sapiens ?

• Third molar

• Epiglottis

• Plica semilunaris

• Pyrimidalis muscle

The extra structure that provides nutrition to the embryo is

• umbilicus

• amnion

• chorian

• placenta