Assertion : Water and mineral uptake by root hairs from the soil occurs through apoplast until it reaches endodermis.

Reason : Casparian strips in endodermis are suberized

• If both Assertion and Reason are true and the reason is the correct explanation of the assertion

• If both Assertion and Reason are true but the reason is not the correct explanation of the assertion

• If Assertion is true statement but Reason is false

• If both Assertion and Reason are false statements

Assertion : Long distance flow of photoassimilates in plants occurs through sieve tubes.

Reason : Mature sieve tubes have parietal cytoplasm and perforated sieve plates.

• If both Assertion and Reason are true and the reason is the correct explanation of the assertion

• If both Assertion and Reason are true but the reason is not the correct explanation of the assertion

• If Assertion is true statement but Reason is false

• If both Assertion and Reason are false statements

23.

Assertion : Leaf butterfly and stick insect show mimicry to dodge their enemies.

Reason : Mimicry is a method to acquire body colour blending with the surroundings.

• If both Assertion and Reason are true and the reason is the correct explanation of the assertion

• If both Assertion and Reason are true but the reason is not the correct explanation of the assertion

• If Assertion is true statement but Reason is false

• If both Assertion and Reason are false statements

In a dicotyledonous stem, the sequence of tissues from the outside to the inside is

• phellem - pericycle - endodermis - phloem

• phellem - phloem - endodermis - pericycle

• phellem - endodermis - pericycle - phloem

• pericycle - phellem - endodermis - phloem

The crystal of lead zirconate is a key component of

• electroencephalography

• electrocardiography

• magnetoencephalography

• sonography

Which one of the following pairs of terms/ names mean one and the same thing?

• Gene pool - genome

• Codon - gene

• Cistron - triplet

• DNA fingerprinting - DNA profiling

Mr.X is eating curd/yoghurt. For this food intake in a food chain he should be considered as occupying

• first trophic leve

• second trophic level

• third trophic level

• fourth trophic level

July 11 is observed as:

• World population day

• No tobacco day

• World environment day

• World health day

Biological Oxygen Demand (BOD) is a measure of

• industrial wastes poured into water bodies

• extent to which water is polluted with organic compounds

• amount of carbon monoxide inseparably combined with haemoglobin

• amount of oxygen needed by green plants during night

Both corpus luteum and macula lutea are

• found in human ovaries

• a source of hormones

• characterized by a yellow colour

• contributory in maintaining pregnancy