Question # 1

In living organisms,water quantity is

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70 → 90%

80 → 70%

60 → 70%

50 → 50%

The outer most boundary in most of the plant cells is

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Cell wall

Cell membrane

Primary wall

None

Which of the following phylum have animals which lack tissue organized into organs and have indeterminate shape and are symmetrical

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Arthropoda

Echinodermata

Coeleontrats

Porifera

Ecosystem that occupy broad geographical regions are

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Biosphere

Biomes

Community

All of above

Branch of biology which deals with structure of organisms the cells and their organelles at molecular level is

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Biotechnology

Microbiology

Molecular biology

Biochemistry

Which one is not involved for upset of nutrient cycle

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Not enough food is produced

Too much consumed

Land is less

Decayed nutrients are not returned to the ground

The Elements found in living organisms are known as

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Bioelements

Molecules

Major elements

None

The frog has number of chromosomes

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46

13

26

40

The division of the cytoplasm or whole cell is called

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Cytoplasmic division

Karyokinesis

Cytokinesis

Whole cell division

All vertebrates have

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Open circulatory system

Closed circulatory system

No transportation system

Transportation occurs through skin

Seed plants are predominantly present all around us due to their better

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Establishment

Reproduction

Availability of H₂O

None

Sinus venosus in case of fishes receives from the body

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Oxygenated blood

Deoxygenated blood

Both a & b

None

Altered alternative forms of a gene whose number is more than two are known as

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Incomplete dominance

Multiple alleles

Double alleles

None

Which one is not true about the presence of gases in air

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It consists of 79% N

It consists of 20% O₂

It consists of 0.03% CO₂

It consists of 80% inert gases

DNA and RNA molecules are made up of repeating unites called

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Nucleosides

Nucleotides

Phosphate group

Nitrogenous bases

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