Question:- Name a fossil bird which looks like a bird but has many other features found in reptiles? A. Dodo B. Archaeopteryx C. Flamingos D. Mouse Bird
Answer:- Ans. B Explanation: Archaeopteryx is a fossil bird which looks like a bird but it has many other features which are found in reptiles.
Question:- Name the organs which have different basic structure but have similar appearance and perform similar functions? A. Analogous organs B. Homologous organs C. Both A and B D. Neither A nor B
Answer:- Ans. A Explanation: Analogous organs have different basic structure but have similar appearance and perform similar functions. Example wings of an insect and a bird have different structures but similar functions.
Question:- Who suggested that life must have developed from the simple inorganic molecules like methane, hydrogen etc. which were present on the earth soon after it was formed? A. Darwin B. Marrie Curie C. Haldane D. None of the above
Answer:- Ans. C Explanation: J.B.S Haldane, a British scientist suggested in 1929 that life must have developed from the simple inorganic molecules like methane, hydrogen etc. which were present on the earth soon after it was formed.
Question:- Aves have evolved from: A. Amphibians B. Arthropods C. Mammals D. Reptiles
Answer:- Aves have evolved from: A. Amphibians B. Arthropods C. Mammals D. Reptiles
Question:- The theory of origin of life on earth is proposed by: A. Haldane B. Stanley Miller C. Harold C. Urey D. Lamarck
Answer:- Ans. A Explanation: The theory of origin of life on earth is proposed by Haldane was confirmed by the experiments conducted by Stanley L. Miller and Harold C. Urey.
Question:- Which of the following are the postulates of Darwin’s theory of evolution? A. Within any population, there is natural variation. B. Even though all species produce a large number of offsprings, populations remain fairly constant naturally. C. The struggle for survival within populations eliminates the unfit individuals. D. All the above are correct
Answer:- Ans D Explanation: Darwin’s theory of evolution can be described as: within any population, there is natural variation. Some individuals have more favourable variations than others. Even though all species produce a large number of offsprings, populations remain fairly constant naturally. The struggle for survival within populations eliminates the unfit individuals. This is called natural selection.
Question:- The process by which new species develop from the existing species is called: A. Homologous B. Analogous C. Speciation D. Genetic variation
Answer:- Ans. C Explanation: Speciation is the formation of new species.
Question:- Too much release of thyroid hormone in the body causes: A. Hypothyroidism B. Hyperthyroidism C. Goitre D. None of the above
Answer:- Ans. B Explanation: Hyperthyroidism is caused by too much release of thyroid hormone.
Question:- What are the symptoms of release of too much T3 and T4 hormones? A. Anxiety B. Nervousness C. Hair loss D. All of the above
Answer:- Ans. D Explanation: Symptoms of too much T3 and T4 in your body causes: anxiety, irritability or moodiness, nervousness, hyperactivity, sweating or sensitivity to high temperatures, hand trembling (shaking), hair loss, missed or light menstrual periods.
Question:- Name a disease causes due to the deficiency of iodine? A. Thyroid cancer B. Solitary thyroid nodules C. Goitre D. Thyroiditis
Answer:- Ans. C Explanation: Goitre is a bulge in the neck. A toxic goitre is associated with hyperthyroidism, and a simple or endemic goitre, is caused by iodine deficiency.
Question:- The symptoms of hypothyroidism are: A. Dry skin and hair B. Depression C. Joint and muscle pain D. All of the above
Answer:- Ans. D Explanation: Symptoms that may indicate too little T3 and T4 in the body causes hypothyroidism: trouble sleeping, tiredness and fatigue, difficulty concentrating, dry skin and hair, depression, sensitivity to cold temperature, frequent, heavy periods, joint and muscle pain.
Question:- An autoimmune disease of the thyroid tissue is called: A. Graves disease B. Thyroiditis C. Thyroid Cancer D. None of the above
Answer:- Ans. A Explanation: There can be many reasons for an overactive thyroid. It is often caused by an autoimmune disease of the thyroid tissue, called Graves disease (or Basedow’s disease).
Question:- A condition of a chronic inflammation of the thyroid, which lead to under activity? A. Goitre B. Thyroiditis C. Hypothyroidism D. Hyperthyroidism
Answer:- Ans. B Explanation: A condition called Hashimoto’s thyroiditis, a chronic inflammation of the thyroid, can also lead to under activity. The use of certain medications can also affect the production of thyroid hormones.