In CBSE Class 10 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given.
Here we are providing you with Class 10 Science Chapter 8 How Do Organisms Reproduce Case Study Questions, by practicing this Case Study and Passage Based Questions will help you in your Class 10th Board Exam.
Case Study Chapter 8 How Do Organisms Reproduce
Here, we have provided case-based/passage-based questions for Class 10 Science Chapter 5 Periodic Classification of Elements
Case Study/Passage Based Questions
Question 1:
The male reproductive system consists of portions that produce the germ cells and other portions that deliver the germ cells to the site of fertilization. Testes are located outside the abdominal cavity in the scrotum because sperm formation requires a lower temperature than normal
body temperature. It also has a role of secretion of male sex hormone which brings changes in appearance seen in boys at the time of puberty. Vas deferens unites with a tube coming from the urinary bladder. The urethra is a common passage for sperms and urine. The prostate gland and seminal vesicles add their secretions so that sperms are now in a fluid.
(i) Name the sex hormone associated with males.
(a) Testosterone
(b) Progesterone
(c) Oestrogen
(d) None of these
Answer: (a) Testosterone
(ii) Which of the following statements is incorrect ?
(a) Sperms are present in a fluid
(b) Fluid provides nutrition to sperms
(c) Fluid makes easier transportation of sperms
(d) Fluid helps to bind the sperms together
Answer: (d) Fluid helps to bind the sperms together/p>
(iii) Testes are located outside the abdominal cavity in scrotum because
(a) sperms formation requires higher temperature than body temperature
(b) sperms formation requires lower temperature than body temperature
(c) it is easier to transport sperms from the scrotum
(d) None of these
Answer: (b) sperms formation requires lower temperature than body temperature
(iv) Which of the following statement is incorrect?
(a) Sperms and urine has a common passage from urethra.
(b) Sperms have long tail that helps them to move forward.
(c) Sperms contain genetic material.
(d) Sperms formation requires 1–3°C higher temperature than normal body temperature.
Answer: (d) Sperms formation requires 1–3°C higher temperature than normal body temperature.
(v) What is the nature of semen?
(a) slightly acidic
(b) Neutral
(c) Slightly basic
(d) Strongly basic
Answer: (c) Slightly basic
Question 2:
Rohit collected some pond water which was dark green in color in a test tube. She took out green-colored mass from it and separated its filaments by using needles. She broke some filaments into small fragments and put them in a Petri dish containing clean water. She observed that after a few days the small fragments gave rise to complete filaments.
2.1) What do you think the mass of green filament was ?
(a) It was a mass of Spirogyra filament.
(b) It was a colony of Volvox algae.
(c) It was large brown algae.
(d) It was a mass of fungal filaments
Answer:(a) It was a mass of Spirogyra filament.
2.2) Organisms that reproduces in similar ways as Spirogyra is :
(a) yeast
(b) hydra
(c) Planaria
(d) Sea anemone
Answer: (d) Sea anemone
2.3) The small fragment gave rise to new filament. What does it indicate ?
(a) Spirogyra reproduces asexually through budding.
(b) Spirogyra reproduces asexually through spore formation.
(c) Spirogyra reproduces asexually through fragmentation.
(d) Spirogyra reproduces asexually through fission
Answer: (c) Spirogyra reproduces asexually through fragmentation.
2.4) Which among the following organisms do not reproduce by fragmentation ?
(a) Riccia
(b) Selaginella
(c) Aurelia
(d) Marchantia
Answer: (c) Aurelia.
2.5) Select the correct statement from the following.
(a) Only multicellular organisms can undergo fragmentation.
(b) Both unicellular and multicellular organisms can undergo fragmentation.
(c) Fragmentation is sexual mode of reproduction.
(d) Fragmentation is found only in algae
Answer: (a) Only multicellular organisms can undergo fragmentation
You can also practice Class 10 Science MCQ Questions for Board Exams.