Biology MCQs

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Systemic circulation is another part of the circulation where oxygenated blood is pumped from the heart to every organ and tissue in the body, and deoxygenated blood returns to the heart again.

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Cardia, fundus, corpus, antrum, and pylorus are the parts of the stomach’s anatomy.

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The thyroid is a lipid-soluble hormone whereas amine, peptide, and protein hormones are water-soluble, ranging in size from 3 to more than 200 amino acids.

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Plague disease is caused by Yersinia pestis bacterium which is spread mostly by fleas on rodents and other animals.

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Tricho-Card is a nonpathogenic product that is used in various crops as well as horticulture and ornamental plants.

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Sexual reproduction in Aspergillus is rare and takes place in favourable conditions. Sex organs are produced on the same mycelium which has produced conidia. Male organs are called Antheridium or Pollinoduim and female are called archicarp or Ascogonium. Female organs develop as a branch of hypha. The antheridium curves round and bend towards the apex of archicarp as a result of which they become spirally coiled and their tips get fused.

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The thyroid gland is one of the largest endocrine glands in the human body which is found in the neck. It controls how quickly the body uses energy, makes proteins, and controls how sensitive the body is to other hormones.

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Plant morphology or phytomorphology is the study of the physical form and external structure of plants. This is usually considered distinct from plant anatomy, which is the study of the internal structure of plants, especially at the microscopic level. It is useful in the visual identification of plants.

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Robert Hooke (1665) observed a section of cork under his microscope and found its structure resembling a ‘honey comb’. He gave the name ‘cell’ to each of the compartments of the honey comb like structure. Two German biologists, M Schleiden and T Schwann, later proposed the famous cell theory in 1938-39.

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A humming bird the smallest of all known birds can rotate each of its wings in a circle, allowing them to be the only bird which can fly forwards, backwards, up, down, sideways or sit in sheer space. To hover, humming birds move their wings forward and backward in a repeated figure eight.