Can the wing of a butterfly and the wing of a bat be considered – homologous organs? Why or why not?
Ans: The wing of a butterfly and the wing of a bat cannot be considered homologous organs. They are analogous organs because they have similar functions (flight) but different evolutionary origins.
GENETICS AND HEREDITY: SHORT ANSWER TYPE QUESTIONS Class 10th CHAPTER 14 JKBOSE/NCERT Read More »
What is speciation?
Ans: Speciation is the process by which new distinct species arise from existing species.
GENETICS AND HEREDITY: VERY SHORT ANSWER TYPE QUESTIONS 10th CHAPTER 14 JKBOSE/NCERT Read More »
Explain the male reproductive system.
Answer: The male reproductive system consists of the following structures:
1. Testes: The testes are the primary male reproductive organs responsible for producing sperm and testosterone.
2. Epididymis: The epididymis is a coiled tube located on the surface of each testis. It is responsible for storing and maturing sperm.
3. Vas Deferens: The vas deferens is a muscular tube that carries sperm from the epididymis to the urethra.
4. Seminal Vesicles, Prostate Gland, and Bulbourethral Glands: These glands secrete fluids that combine with sperm to form semen.
5. Urethra: The urethra is a tube that serves both the reproductive and urinary systems. It carries urine from the bladder and semen from the reproductive organs.
6. Penis: The penis is the external male reproductive organ. It delivers sperm into the female reproductive tract during sexual intercourse.
HOW DO ORGANISMS REPRODUCE: Long Answer Type Question Class 10th Chapter 10 JKBOSE/NCERT Read More »
Name two unisexual and two bisexual flowers.
Ans: Two examples of unisexual flowers are:
Papaya: It has separate male and female flowers on different plants.
Watermelon: It also has separate male and female flowers on different plants.
Two examples of bisexual flowers are:
Rose: It has both male stamens and female pistils within the same flower.
Sunflower: It also has both male and female reproductive structures within the same flower.
ASSERTION: Gonorrhoea is a sexually transmitted disease.
REASON: It is caused by the virus.
Answer: False
Explanation: The assertion is true, as gonorrhoea is indeed a sexually transmitted disease. However, the reason is incorrect. Gonorrhoea is caused by the bacterium Neisseria gonorrhoeae, not a virus.
Define fruit.
Ans: A fruit is the mature ovary of a flowering plant that typically contains seeds. It develops from the fertilized flower and serves as a means of seed dispersal. Fruits are often sweet or fleshy, but they can also be dry, depending on the type of plant
