Saleha Pervez, Mansi Garg and, Poonam Singh Solutions for Chapter: Biological Classification, Exercise 1: Self Check

Which of the following statements is/are correct?

I. Viruses lack enzymes necessary for the generation of energy.

II. Viruses can be cultured in any synthetic medium.

III. Viruses are transmitted from one organism to another by biological vectors only.

Select the correct answer using the codes given below:

Consider the following animal:

I. Sea cow

II. Sea horse

III. Sea lion

Which of the following is/are mammal/mammals?

The government of India encourages the cultivation of 'Sea buckthorn.' What is the importance of this plant?
$\mathrm{I}.$ It helps in controlling soil erosion and in preventing desertification.
$\mathrm{II}.$ It is a rich source of biodiesel.
$\mathrm{III}.$ It has nutritional value and is well adapted to live in cold areas of high altitudes.
$\mathrm{IV}.$ Its timber is of great commercial value.

Which of these statements given above is/are correct? Select the correct answer using the codes below: 

Mycorrhizal biotechnology has been used in rehabilitating degraded sites because mycorrhiza enables the plants to-
I. Resist drought and increase the absorptive area.
II. Tolerate extremes of PH.
III. Resist disease infestation. 
Select the correct answer using the codes given below.

Consider the following statements:

I. Dengue is a protozoan disease transmitted by mosquitoes.

II. Retro-orbital pain is not a symptom of dengue.

III. Skin rash and bleeding from the nose and gums are some dengue symptoms.

Which of these statements given above is/are correct?

Consider the following statements:
I. The common blue-green algae, Spirogyra and Ulothrix, are found in both freshwater ponds and oceans.
II. The Chameleon can look ahead with one eye and at the same time look behind with another.
Which of these statements is/are correct?

Bacteria are very useful nowadays as many techniques were developed to utilise them for the extraction of useful products. Which of the following bacteria are used for the synthesis of antibiotics?

I. Bacillus

II. Streptomyces

III. Lactobacillus

Sphagnum is an important bryophyte. Consider the following statements about it:

I. It is a chief constituent of peat.

II. Very useful in transportation of wet or moisture-requiring products.

III. Also used for the synthesis of antibiotics.