Which one of the following statement about virus is correct?

(a)

Possess their own metabolic system

(b)

They are facultative parasites

(c)

They contain DNA or RNA

(d)

Enzymes are present

Identify the incorrect statement about the Gram positive bacteria.

(a)

Teichoic acid absent

(b)

High percentage of peptidoglycan is found in cell wall

(c)

Cell wall is single layered

(d)

Lipopolysaccharide is present in cell wall

Identify the Archaebacterium.

(a)

Acetobacter

(b)

Erwinia

(c)

Treponema

(d)

Methanobacterium

The respiratory pigment in cockroach is _____.

(a)

Haemoglobin

(b)

Haemocyanin

(c)

Oxyhaemoglobin

(d)

None of the above

Exoskeleton of which phylum consists of chitinous cuticle?

(a)

Annelida

(b)

Porifera

(c)

Arthropoda

(d)

Echinodermata

Classification of sponges is primarily based on the __________

(a)

body organization

(b)

body plan

(c)

skeleton

(d)

canal system

Cavity of coelenterates is called ____________

(a)

coelenteron

(b)

coelom

(c)

cavity

(d)

none of these

Mollusca is _______

(a)

Triploblastic, acoelomate

(b)

Triploblastic, coelomate

(c)

Diploblastic, acoelomate

(d)

Diploblastic, coelomate

Peripatus is known as a connecting link, because it has the characters of both _________

(a)

Fishes & amphibians

(b)

Reptiles & birds

(c)

Aves & fishes

(d)

Arthropoda & annelids

Osphradium of Pila globosa is _________

(a)

thermoreceptor

(b)

Pheretima

(c)

chemoreceptor

(d)

tangoreceptor

New phages are not formed in lysogenic cycle. Explain.

Are viruses useful to us? Justify.

Is bacterial photosynthesis similar to photosynthesis in higher plants? Reason out.

Why reproduction is necessary? Is it essential for survival? If a living organism does not reproduce, to which category will it belong, living or nonliving?

Why virus cannot grow on non-living culture medium.

Why reproduction cannot be the defining characteristic of living organisms?

List the features that all vertebrates show at some point in their development.

Compare closed and open circulatory system.

Identify the structure that the archenteron becomes in a developing animal.

Why blood is considered as a typical connective tissue?

Distinguish Prokaryotic and Eukaryotic organisms.

What are the three main symmetry of viruses?

What is Fimbriae or Pili?

Identify the diagram and label any 2 parts.

Enumerate about Growth.

Describe the step of Adsorption in lytic cycle of phages.

Write the importance of Need of Classification.

Write the characteristics of Bacterial chromosome.

Define Aerobic respiration of bacteria.

Distinguish between Prokaryotes and Eukaryotes.

Match the following.

Column I	Column II
(P) Euplectella	i) Sea anemone
(Q) Adamsia	ii) Filarial worm
(R) Wuchereria	iii) Venus flower basket
(S) Antedom	iv) Sea-Lily

(a) (P-iii) (Q-i) (R-ii) (S-iv)
(b) (P-iv) (Q-ii) (R-iii) (S-i)
(c) (P-i) (Q-ii) (R-iv) (S-iii)
(d) (P-ii) (Q-i) (R-iv) (S-iii)

Name the excretory organs found in different animals (any four with examples).

Write the general characters of the phylum cnidaria.

What is meant by 'living fabrics'?

A tree is believed to be releasing oxygen during night time. Do you believe the truthfulness of this statement? Justify your answer by giving reasons?

Grasses have an adaptive mechanism to compensate photorespiratory losses. Name and describe the mechanism.

Respiratory quotient is zero in succulent plants. Why?

Explain the reactions taking place in mitochondrial inner membrane.

Explain Lysogenic cycle of a phage.

Observe the animal below and answer the following questions.

a. Identify the animal
b. What type of symmetry does this animal exhibit?
c. Is this animal Cephalized?
d. How many germ layers does this animal have?
e. How many openings does this animal's digestive system have?
f. Does this animal have neurons?