Changes seen in girls at the time of puberty are: (i) Mammary glands develop and increase in size. (ii) Menstruation starts. (iii) Hairs grow in armpits and pubic regions. (iv) Extra fat deposited in thighs and hips and in other body parts.
Changes seen in girls at the time of puberty are:
(i) Mammary glands develop and increase in size.
(ii) Menstruation starts.
(iii) Hairs grow in armpits and pubic regions.
(iv) Extra fat deposited in thighs and hips and in other body parts.
Seminal vesicles and prostate gland are the part of male reproductive system and their functions are- (i) Both add their secretions to vas deferens which carries sperms from the testes, thus makes the transport of sperms easier. (ii) Provide nutrition to the sperms.
Seminal vesicles and prostate gland are the part of male reproductive system and their functions are-
(i) Both add their secretions to vas deferens which carries sperms from the testes, thus makes the transport of sperms easier.
(ii) Provide nutrition to the sperms.
Pollination - In this process pollen grains are transferred from anther to stigma of same flower or another flower. In this process no fusion of 2 cells take place. Fertilization - It is defined as the fusion of male and female gametes to form zygote. Fusion of 2 cells, male gamete and female gameteRead more
Pollination – In this process pollen grains are transferred from anther to stigma of same flower or another flower. In this process no fusion of 2 cells take place.
Fertilization – It is defined as the fusion of male and female gametes to form zygote. Fusion of 2 cells, male gamete and female gametes, take place.
DNA contains the genetic information which transfers from parents to offspring and copying of DNA is the process in reproduction due to which genetic information transfers.
DNA contains the genetic information which transfers from parents to offspring and copying of DNA is the process in reproduction due to which genetic information transfers.
Vegetative propagation is practiced for growing some types of plants because of following advantages - (i) It is used to grow a plant in which viable seeds are not formed or very few seeds are produced. eg:- Orange, Banana, Pineapple. (ii) It helps to introduce plants in new areas where the seed gerRead more
Vegetative propagation is practiced for growing some types of plants because of following advantages –
(i) It is used to grow a plant in which viable seeds are not formed or very few seeds are produced. eg:- Orange, Banana, Pineapple.
(ii) It helps to introduce plants in new areas where the seed germination fails to produce mature plant due to change in environmental factors and the soil.
(iii) It is more rapid, easier and cheaper method.
(iv) By this method a good quality of a race or variety can be preserved.
What are the changes seen in girls at the time of puberty?
Changes seen in girls at the time of puberty are: (i) Mammary glands develop and increase in size. (ii) Menstruation starts. (iii) Hairs grow in armpits and pubic regions. (iv) Extra fat deposited in thighs and hips and in other body parts.
Changes seen in girls at the time of puberty are:
See less(i) Mammary glands develop and increase in size.
(ii) Menstruation starts.
(iii) Hairs grow in armpits and pubic regions.
(iv) Extra fat deposited in thighs and hips and in other body parts.
What is the role of the seminal vesicles and the prostate gland?
Seminal vesicles and prostate gland are the part of male reproductive system and their functions are- (i) Both add their secretions to vas deferens which carries sperms from the testes, thus makes the transport of sperms easier. (ii) Provide nutrition to the sperms.
Seminal vesicles and prostate gland are the part of male reproductive system and their functions are-
See less(i) Both add their secretions to vas deferens which carries sperms from the testes, thus makes the transport of sperms easier.
(ii) Provide nutrition to the sperms.
How is the process of pollination different from fertilisation?
Pollination - In this process pollen grains are transferred from anther to stigma of same flower or another flower. In this process no fusion of 2 cells take place. Fertilization - It is defined as the fusion of male and female gametes to form zygote. Fusion of 2 cells, male gamete and female gameteRead more
Pollination – In this process pollen grains are transferred from anther to stigma of same flower or another flower. In this process no fusion of 2 cells take place.
Fertilization – It is defined as the fusion of male and female gametes to form zygote. Fusion of 2 cells, male gamete and female gametes, take place.
See lessWhy is DNA copying an essential part of the process of reproduction?
DNA contains the genetic information which transfers from parents to offspring and copying of DNA is the process in reproduction due to which genetic information transfers.
DNA contains the genetic information which transfers from parents to offspring and copying of DNA is the process in reproduction due to which genetic information transfers.
See lessWhy is vegetative propagation practiced for growing some types of plants?
Vegetative propagation is practiced for growing some types of plants because of following advantages - (i) It is used to grow a plant in which viable seeds are not formed or very few seeds are produced. eg:- Orange, Banana, Pineapple. (ii) It helps to introduce plants in new areas where the seed gerRead more
Vegetative propagation is practiced for growing some types of plants because of following advantages –
See less(i) It is used to grow a plant in which viable seeds are not formed or very few seeds are produced. eg:- Orange, Banana, Pineapple.
(ii) It helps to introduce plants in new areas where the seed germination fails to produce mature plant due to change in environmental factors and the soil.
(iii) It is more rapid, easier and cheaper method.
(iv) By this method a good quality of a race or variety can be preserved.