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- Question
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
- Correct Answer
- Sporophytes are diploid, whereas gametophytes are haploid.
ExplanationSexual 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.
- 1. Which of the following would cause gene flow?
Options- A. Individuals moving into population
- B. Genetic drift
- C. Mutation
- D. Artificial selection Discuss
- 2. Autoimmune diseases associated with vitiligo
Options- A. Thyroiditis
- B. Diabetes mellitus
- C. Psoriasis
- D. All of the above Discuss
- 3. What type of macromolecule is an enzyme?
Options- A. Proteins
- B. Saturated fats
- C. Phospholipids
- D. Lipids Discuss
- 4. The gap between two communicating neurons is termed
Options- A. Schwann cell
- B. Effector
- C. Synaptic cleft
- D. Cell body Discuss
- 5. Impulse conduction is fastest in neurons that are
Options- A. Myelinated
- B. Motor
- C. Unmyelinated
- D. Sensory Discuss
- 6. Outward extension of the shoulder bone is the
Options- A. acromion
- B. foramen
- C. cancellous bone
- D. All of the above Discuss
- 7. Where is excess glucose stored?
Options- A. Blood
- B. Liver
- C. Heart
- D. Kidneys Discuss
- 8. 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 Discuss
- 9. Which of these is an example of a haploid cells?
Options- A. Sperms
- B. Neurons
- C. Red blood cells
- D. All of the above Discuss
- 10. 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 Discuss
Biology problems
Search Results
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.
Correct Answer: All of the above
Correct Answer: Proteins
Explanation:
Enzymes are protein macromolecules. Enzymes are almost always made of proteins only. Proteins are large biopolymer molecules that are made up of repeating monomer units called amino acids. There are 20 different common amino acids that make up proteins like enzymes. Of these, nine amino acids are essential, which means you must get them from your diet.
Enzymes catalyze chemical reactions in biological systems. This means that they speed up the rate of the reaction.
Correct Answer: Synaptic cleft
Explanation:
A neuron or nerve cell is a cell that carries electrical impulses. Neurons are the basic units of the nervous system and its most important part is the brain. Every neuron is made of a cell body (also called a soma), dendrites and an axon. Dendrites and axons are nerve fibres.
The gap between two communicating neurons is termed Synaptic cleft.
Correct Answer: Myelinated
Explanation:
A myelinated nerve can be found int the brain or spinal cord as well as the peripheral nervous system, it is white and is surrounded by schwann cells or oligodendrocytes.
Correct Answer: acromion
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.
Correct Answer: urinary output
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.
Correct Answer: appositional growth
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