Biology problems
- 1. Which of the following would cause gene flow?
Options- A. Individuals moving into population
- B. Genetic drift
- C. Mutation
- D. Artificial selection Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk
Correct Answer: Individuals moving into population
Explanation:
Gene flow means migration of genes from one to another. This gene flow is caused by individuals moving into population.
- 2. Select the correct statement contrasting gametophytes and sporophytes.
Options- A. Sporophytes are diploid, whereas gametophytes are haploid.
- B. Sporophytes are vascular, whereas gametophytes are nonvascular.
- C. Sporophytes are larger than gametophytes.
- D. All of the above Also asked in: AIEEE
Correct Answer: Sporophytes are diploid, whereas gametophytes are haploid.
Explanation:
Sexual reproduction results in gametes that combine two cells from different individuals. Meiosis also produces gametes. Haploids contain one set of chromosomes in each of their cells. Diploids cells contain two chromosome sets. For plants, haploid and diploid cells divide via mitosis. The plants? haploid phase is called the gametophyte, and the diploid phase is called the sporophyte.
Sporophytes are diploid plants that use meiosis to produce spores. These spores are haploid cells that grow into haploid gametophytes. Megaspores grow into female gametophytes, and microspores grow into male gametophytes.
Gametophytes are haploid plants that use mitosis to make haploid gametes. These gametes are female in the form of an ovum (egg) or male in the form of sperm.
- 4. Where is excess glucose stored?
Options- A. Blood
- B. Liver
- C. Heart
- D. Kidneys Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
Correct Answer: Liver
Explanation:
Glucose is essential for energy in all the living organisms. When we have more glucose than needs in our bloodstream, then the excess glucose is stored as large compounds as Glycogen. This glycogen fills the cells of the liver and available for any quick shots of energy.
Hence, Liver is called as warehouse for the excess glucose.
- 5. Factors that aid venous return include all except
Options- A. pressure changes in the thorax
- B. urinary output
- C. activity of skeletal muscles
- D. venous valves Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
Correct Answer: urinary output
- 6. Which of these is an example of a haploid cells?
Options- A. Sperms
- B. Neurons
- C. Red blood cells
- D. All of the above Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Sperms
Explanation:
In the above options, sperms are the haploid cells. In humans, haploid cells are those have only half the number of usual number of chromosomes. Sperm, gamates and egg cells are the haploid cells examples.
- 7. The process of bones increasing in width is known as
Options- A. appositional growth
- B. concentric growth
- C. closing of the epiphyseal plate
- D. long bones reaching adult length and width Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: appositional growth
- 8. Which systems comprise the nervous system?
Options- A. Central nervous system
- B. Peripheral nervous system
- C. Both A & B
- D. None of the above Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Both A & B
Explanation:
The nervous system of the human brain consists of the central nervous system which has brain and the spinal cord and the peripheral nervous system which has perpheral, cranary, spinal nerves.
- 9. Which bacteria cause the greatest harm in the food industry?
Options- A. Recycling
- B. Digestive
- C. Fermenting
- D. Pathogenic Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Pathogenic
Explanation:
Pathogenic bacteria cause the greatest harm in the food industry.
- 10. Sponges are most accurately described as
Options- A. marine predators
- B. chemoautrophs
- C. filter feeders
- D. freshwater scavengers Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
Correct Answer: filter feeders
More in General Knowledge:
Programming
Copyright ©CuriousTab. All rights reserved.