Science and Technology II · Textbook solutions

Life Processes in Living Organisms Part 2

Every solved example, exercise, and miscellaneous question — in the order the textbook teaches them. · 27 questions

Exercise

27 q

Ex Q1

Complete the following chart. Asexual reproduction Sexual reproduction 1. Reproduction that occurs with the help of somatic cells is called as asexual reproduction. 1. \dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots 2. \dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots 2. Male and female parent are necessary for sexual reproduction. 3. This reproduction occurs with the help of mitosis only. 3. \dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots 4. \dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots 4. New individual formed by this method is genetically different from parents. 5. Asexual reproduction occurs in different individuals by various methods like binary fission, multiple fission, budding, fragmentation, regeneration, vegetative propagation, spore production, etc. 5. \dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots\dots

Fill in the blanks.
Ex Q2(a) $In humans, sperm production occurs in the organ ----------------.$
Ex Q2(b) $In humans, ------ chromosome is responsible for maleness.$
Ex Q2(c) $In male and female reproductive system of human, ------------- gland is same.$
Ex Q2(d) $Implantation of embryo occurs in ------$
Ex Q2(e) $---------- type of reproduction occurs without fusion of gametes.$
Ex Q2(f) $Body breaks up into several fragments and each fragment starts to live as a new individual. This is -- -- -- -- -- -- -- type of reproduction.$
Ex Q2(g) $Pollen grains are formed by -- ----- -- -- -- division in locules of anthers.$
Ex Q3 $Complete the paragraph with the help of words given in the bracket. (Luteinizing hormone, endometrium of uterus, follicle stimulating hormone, estrogen, progesterone, corpus luteum) Growth of follicles present in the ovary occurs under the effect of ----- This follicle secretes estrogen. -- --- - -- -- -- -- grows / regenerates under the effect of estrogen. Under the effect of --- ---, fully grown up follicle bursts, ovulation occurs and -- --- -- -- is formed from remaining part of follicle. It secrets --- --- -- -- and --- --- -- -- --. Under the effect of these hormones, glands of -- -- -- -- are activated and it becomes ready for implantation.$
Answer the following questions in short.
Ex Q4(a) $Explain with examples types of asexual reproduction in unicellular organism.$
Ex Q4(b) $Explain the concept of IVF.$
Ex Q4(c) $Which precautions will you follow to maintain the reproductive health?$
Ex Q4(d) $What is menstrual cycle? Describe it in brief.$
Ex Q5 $In case of sexual reproduction, new-born show similarities about characters. Explain this statement with suitable examples.$
Sketch the labelled diagrams.
Ex Q6(a) $Human male reproductive system.$
Ex Q6(b) $Human female reproductive system.$
Ex Q6(c) $Flower with its sexual reproductive organs.$
Ex Q6(d) $Menstrual cycle.$
Give the names.
Ex Q7(a) $Hormones related with male reproductive system.$
Ex Q7(b) $Hormones secreted by ovary of female reproductive system.$
Ex Q7(c) $Types of twins.$
Ex Q7(d) $Any two sexual diseases.$
Ex Q7(e) $Methods of family planning.$
Ex Q8 $Gender of child is determined by the male partner of couple. Explain with reasons whether this statement is true or false.$
Ex Q9 $Explain asexual reproduction in plants.$
Ex Q10 $Modern techniques like surrogate mother, sperm bank and IVF technique will help the human beings. Justify this statement.$
Ex Q11 $Explain sexual reproduction in plants.$

Asexual reproduction	Sexual reproduction
1. Reproduction that occurs with the help of somatic cells is called as asexual reproduction.	1. …………………………………………
2. …………………………………………	2. Male and female parent are necessary for sexual reproduction.
3. This reproduction occurs with the help of mitosis only.	3. …………………………………………
4. …………………………………………	4. New individual formed by this method is genetically different from parents.
5. Asexual reproduction occurs in different individuals by various methods like binary fission, multiple fission, budding, fragmentation, regeneration, vegetative propagation, spore production, etc.	5. …………………………………………