Biology MCQs

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From the point of view of evolution of living organisms, the correct sequence of evolution in the above options is: Echidna, Kangaroo, Whale.

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Saffron is a spice derived from the flower of Crocus sativus, commonly known as the “saffron crocus”. It is mainly grown in cold regions. Saffron’ is obtained from the stigma of the plant.

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The set Milliped, Crab, Centipede, Cockroach is correctly paired in Taxonomy, referring to the classification of these animals in their biological taxonomy. All belong to Arthropoda, the invertebrate group characterized by an exoskeleton, a segmented body, and jointed appendages. They hold a vast diversity of forms and have more species than any other animal phyla.

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Charles Robert Darwin gave the theory of evolution in his book “The Origin of Species”. The theory proposed by him is known as “The Theory of Natural Selection”.

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Ecosystems are capable of maintaining their own state of equilibrium. They can regulate their own species structure and functional processes. This capacity of ecosystem of self regulation is referred to as homeostasis.

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In the late 1960s, Orgel proposed that life was based on RNA before being based on DNA or proteins. His theory included genes based on RNA and RNA enzymes.

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Sporisorium sorghi is a fungus in the family of Ustilaginaceae. It is a plant pathogen that causes the covered scum of sorghum.

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Cycas, pinus, Thuja, Cedrus, Abies, Larix are some of the examples of gymnosperms.

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The veins of the leaves are provided with vascular tissue called xylem and phloem. The xylem transports water from the roots to the leaves and the phloem transports food through the leaf to the rest of the plant.

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Intercalary meristem plant tissues increase the size of the internodes. It is found at the internodes or at the base of the leaves.