871. Spiders belong to which class of animals?

1. Arachnids
2. Aves
3. Gastropods
4. Anthozoa

Option “1” is correct
Spiders belong to the class of Arachnids.
872. What is Wilting of plants?

1. Removal of leaves by the plants
2. Loss of rigidity of non-woody parts of plants
3. Respiration process in night by the plants
4. Guttation

Option “2” is correct
Wilting of plants is the loss of rigidity of non-woody parts of plants.
873. Spiders are different from insects because they have –

1. Six legs
2. Eight legs
3. Ten legs
4. Twelve legs

Option “2” is correct
Spiders belong to a group of animals called “arachnids”. Arachnids are a creature with two body segments, eight legs, no wings or antennae. Rest three options are insects. They have six legs, while spider has eight legs. Thus spider is not an insect.
874. Plants growing on rocks are called :

1. Epiphytes
2. Halophytes
3. Xerophytes
4. Lithophytes

Option “4” is correct
Lithophytes are plants that grow in or on rocks. Lithophytes feed off nutrients from rain water and nearby decaying plants, including their own dead tissue.
875. The characteristic odour of garlic is due to –

1. A chloro compound
2. A sulphur compound
3. A fluorine compound
4. Acetic acid

Option “2” is correct
Garlic is made up of sulphuric compounds (Ally methyl sulphide) that render the pungent smell to it.
876. Thalassemia is a hereditary disease. It affects –

1. Blood
2. Spleen
3. Lungs
4. Heart

Option “1” is correct

Thalassemia are forms of inherited autosomal recessive blood disorders that originated in the Mediterranean region. In thalassemia, the disease is caused by the weakening and destruction of red blood cells.
877. A blood vessel that carries blood away from the heart is called-

1. A vein
2. An artery
3. A capilliary
4. Nerve

Option “2” is correct

Blood vessel which carries blood (oxygenated) away from the heart, except pulmonary artery are called artery and blood vessel which carry blood (deoxygenated) towards heart except pulmonary vein are called veins.
878. The tissue in man where no cell division occurs after birth is –

1. Epithelial
2. Nerves
3. Connective
4. Germinal

Option “2” is correct
In the nerve cell no division occurs after the birth.
879. The normal, RBC count in adult male is –

1. 4.5- 6.1 million
2. 7.5- 8.5 million
3. 2- 3 million
4. 1.5- 2.5 million

Option “1” is correct
The normal range in men is approximately 4.7 to 6.1 million cells/ul.
880. Which of the following is not correct?

1. Members of Chlorophyceae are commonly called green algae
2. Members of Phaeophyceae are commonly called red algae
3. Members of Rhodophyceae are commonly called red algae
4. Members of Phaeophyceae are commonly called brown algae

Option “2” is correct
The members of Phaeophyceae are popularly called brown algae. Members of Chlorophyceae are commonly called green algae. The Rhodophyceae or the Red algae is probably the oldest groups of Eukaryotic Algae.
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48 thoughts on “Biology”

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