Class 11 Biology Model Question Set C

Which of the following is a purine nitrogenous base?

A) Cytosine

B) Thymine

C) Adenine

D) Uracil

Bryophytes are known as the "amphibians of the plant kingdom" because:

A) They live exclusively in water.

B) They require water for fertilization.

C) They have true roots and leaves.

D) They produce seeds.

Bacteria that completely lack a rigid cell wall are:

A) Cyanobacteria

B) Mycoplasma

C) Actinomycetes

D) Archaebacteria

The flow of energy through an ecosystem is always:

A) Cyclic

B) Bidirectional

C) Unidirectional

D) Multidirectional

The dominant vegetation type characterized by permafrost and absence of trees is:

A) Deciduous forest

B) Tundra

C) Grassland

D) Tropical rain forest

Binomial nomenclature was formally proposed by:

A) Charles Darwin

B) Carolus Linnaeus

C) Aristotle

D) Ernst Haeckel

Miller and Urey's experiment simulated primitive Earth conditions to test the origin of life using a gaseous mixture of:

A) Methane, Ammonia, Hydrogen, and Water vapor

B) Carbon dioxide, Oxygen, Nitrogen, and Water

C) Methane, Oxygen, Nitrogen, and Ammonia

D) Hydrogen, Oxygen, Carbon monoxide, and Nitrogen

The primary function of the contractile vacuole in Paramecium is:

A) Respiration

B) Osmoregulation and excretion

C) Digestion

D) Reproduction

Pneumatic bones are a key flight adaptation found in:

A) Mammals

B) Reptiles

C) Aves (Birds)

D) Amphibians

Which of the following is an example of in-situ conservation?

A) Botanical Garden

B) National Park

C) Zoological Garden

D) Seed Bank

Which of the following is considered a "living fossil"?

A) Pinus

B) Cycas

C) Dryopteris

D) Marchantia