Biology MCQs

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The amnion or amniotic sac protects everyone embryo from desiccation, it contains amniotic fluid which cushions the embryo from shocks.

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Human beings have 46 chromosomes in their cells. 22 pairs of autosomes and 2 special chromosomes called sex chromosomes are present.

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Race refers to classification of humans into relatively large and distinct population groups based on appearance through heritable phenotypic characteristics, often influenced by and correlated with culture, ethnicity and socio-economic status.
Dobzhansky (1970) has defined race in population concept as “Race are genetically distinct Mendelian populations. They are neither individuals nor particular genotypes; they consist of individuals who differ genetically among themselves.”

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Pomology is a branch of botany that studies fruit and its cultivation.

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Arthropoda is the largest phylum of animals. In Arthropoda we study in detail about insects.

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Hemocoelic body cavity is a characteristic of Cockroach.

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The lysosome is known as the suicide bag of the cell because it contains digestive enzymes.

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The term was introduced by Rudolf von Kölliker in 1863. It was originally synonymous with protoplasm, but later changed to mean cell matter and organelles outside the nucleus.

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The lysogenic state is controlled by the activity of the regulatory region of the lambda phage genome, this region is called immunity operon.

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Important Features of Chlamydomonas: The plant body is unicellular, pear-shaped, and biflagellate, Each cell typically contains a cup-shaped chloroplast, an eye sac, and two contractile vacuoles, Pamela-stage appearance, Asexual reproduction occurs through biflagellate zoospore formation.