1.        The amphibians and the                      represent the two major branches of the tetrapod lineage

A.      reptiles

B.       birds

C.       temnospondyls

D.       amniotes

 

2.        Which of the following statements about hair is true

A.      it is homologous to feathers

B.       it is a dermal structure

C.        it is found in all mammals

D.      it is possessed by all endotherms

 

3.        Approximately how many species of fish are known

A. 28,000

B. 5,000

C.  10,000

D.  50,000

 

4.        The endoskeleton of the echinoderms is composed of

A.      keratin ossicles

B.       calcareous ossicles

C.       keratin spicules

D.      calcareousspicules

 

5.        The first hormone that was isolated

A.      thyroxine

B.       vasopressin

C.        secretin

D.      adrenaline

 

6.        The ultimate source of organic variations is

A.      sexual reproduction

B.       hormonal action

A.     natural selection

B.       mutation

 7

.        Which one of the following is a group of major green house gases

A.      carbon dioxide, methane, chlorofluro carbons and oxides of nitrogen

B.       ethane, oxides of nitrogen, carbon monoxide and chlorofluro carbons

C.       carbon monoxide, methane, chlorofluro carbons and oxides of nitrogen

D.      carbon dioxide, oxides of nitrogen, ethane and chlorofluro carbons

 8

.        The structure of molluscs that forms the shell and houses the gills is the

A.     mantle

B.       epidermis

C.       gastrovascular cavity

D.      odontophore

 9

.        In an ecosystem, which one shows one way passage

A.      nitrogen

B.       carbon

C.       potassium

D.       free energy

 10

.        The central fluid filled cavity of the blastula is known as

A.      archenteron

B.        blastocoel

C.       blastocyst

D.      morula

 11

.        The mammalian skull may be characterized as         _

A.      anapsid

B.       diapsid

C.       biaspid

D.       synapsid

12.        Which of the following phyla of animals is exclusively marine

A.      protozoa

B.       porifera

C.        echinodermata

D.      mollusca

13.        A normal green male Maize is crossed with albino female. The progeny is albino because

A.      trait for a albinism is dominant

B.       the albinos have biochemical to destroy plastids derived from green male

C.     plastids are inherited from female parent

D.      green plastids of male must have mutated

14.        Sertoli cells are found in

A.      liver

B.        seminiferous tubules

C.       pancreas

D.      gut

15.        The sum total of the populations of the same kind of organisms constitute

A.      colony

B.       genus

C.        species

D.      community

 16.        A molluscan shell is made of three layers arranged from the outside to the inside

A.       periostracum, prismatic layer, nacreous layer

B.       mantle layer, prismatic layer, periostracum

C.       nacreous layer, periostracum, mantle layer

D.      none of these

17.        Which one of the following can achieve protection and conservation of biodiversity

A.       eco-development

B.       biospherereserve

C.       national park

D.      game sanctuary

 18.        Lamarck’s “Theory of Organic Evolution” is based upon

A.      effect of environment

B.       use and disuse of body parts

C.       inheritance of acquired characters

D.      all of these

 19.        Myxoedema in adults is caused due to

A.      hyperthyrodism

B.        deficiency of thyroid hormone

C.       overproduction of PTH

D.      deficiency of PTH4.        “

20 The animals of colder countries have small ears, short tail and limbs to avoid moreloss of heat” is the theme of

A.      Allen’s law

B.       Dollo’s law

C.       Gause’s law

D.      Cope’s Law

 21.        Testosterone is secreted by

A.      sertoli cells

B.       leydig cells

C.       spermatocyte

D.      histiocyte

 22. Changing from a bilaterally symmetrical larval form to a radially symmetrical adult involves relocation of various parts. In this process, the left side becomes the

                                       and the right side becomes the                                           

A.      aboral surface, oral surface

B.       anterior surface, posterior surface

C.       dorsal surface, ventral surface

 oral surface, aboralsurface.

23.        The class name Myxini, or the hagfishes, refers to their

A.      lack of eyes

B.       unique circulatory system

C.      production of slime

D.      parasitic lifestyle

  24.        The earliest therians (mammals) evolved in the           

A.      Permian

B.       Triassic

C.       Cretaceous

D.      Cenozoic

 25.        The development of limbs probably aided the first amphibians in

A.      finding mates

B.       swimmin

C.      moving between bodies of water

D.      none of these

 26.        Which of the following is odd one

A.      cockroach, spider, silver-fish

B.       whale, bat,lizard

C.       star-fish, sea-cucumber, sea-urchin

D.     cray-fish, cuttle-fish hag-fish

27.        ABO blood group system is due to

A.      multifactorinheritance

B.       incompletedominance

C.     multiple allelism

D.      epistasis

 28.        In human beings, the eggs are

A.      microlecithal

B.       macrolecithal

mesolecithal

29.        Pyramid of numbers deal with number of

A.      species inarea

B.       sub-species in a community

C.       individuals in a community

D.     individuals in a trophic level

30.        The morphogenetic movement change the hollow spherical blastula into a/an

A.      embryonic disc

B.       gastrula

C.       morula

D.    neurula

31.        The dominant second trophic level, in a lake ecosystem, is

A.      benthos

B.       plankton

C.      zooplankton

D.      phytoplankton

 3

2.        Which of the following classes of molluscs is thought to be the most primitive or closest to the ancestral form

A.      caudofoveata

B.       solenogastres

C.       monoplacophora

D.      polyplacophora

 

33.        Similar niches different communalities or in different regions are commonly occupied by species possessing similar habits, adaptations and adjustments, Such species are called

A.      ecologicalequivalents

B.      ecotypes

C.       ecologicaldominants

D.      diverse species.

34.        Diabetes mellitus is due to deficiency of

A.      LH

B.       FSH

C.       glucagon

D.       insulin

 35.        Which of these classes is characterized by no anus, no suckers, articulated ossicles, and a madreporite on the oral surface

A.      crinoidea

B.        ophiuroidea

C.       asteroidea

D.      echinoidea

 36.        The derivation of the genus name assigned to the invasive marine lampreys found in the Great Lakes refers to their

A.      ability to be parthenogenetic

B.       rasping mouthparts

C.      holding on to rocks in a stream

D.      parasitic nature

 37.        Unlike reptiles, the first mammals were characterized by          

A.      continuously replaced teeth

B.       only one set of teeth during the lifetime

C.       continuously growing teeth

D.      two sets of teeth during the lifetime

38.        Some amphibians have _                 , which are pigmented cells in the skin

A.       chromatophores

B.       osteoblasts

C.       miracidia

D.      none of these