[C] Both (i) and (iv) Transportation & transpiration both are very important work of plant. Transport of water and minerals in xylem takes place by the process of osmosis is due to in ionic difference in concentration in the soil and inside the root. On the other hand, transpiration pull helps iRead more
[C] Both (i) and (iv)
Transportation & transpiration both are very important work of plant. Transport of water and minerals in xylem takes place by the process of osmosis is due to in ionic difference in concentration in the soil and inside the root. On the other hand, transpiration pull helps in the absorption of water to the taller parts of a plant during day time when the stomata are open.
Menstrual cycle is regulated by hypothalamus through the pituitary gland. At the end of menstrual phase, the pituitary FSH gradually increases resulting in follicular development within the ovaries. As the follicles mature, Estrogen secretion increases resulting in a surge in (FSHe and LH) The surgeRead more
Menstrual cycle is regulated by hypothalamus through the pituitary gland. At the end of menstrual phase, the pituitary FSH gradually increases resulting in follicular development within the ovaries. As the follicles mature, Estrogen secretion increases resulting in a surge in (FSHe and LH) The surge of LH15 responsible for ovulation. LH also gonadotropins induces luteinisation. This leading to the formation of corpus luteum. Corpus luteum secretes progesterone and source estrogen which help in maintaining the interine endometrium for implantation.
Failure of fruit formation in rose may be due to several reasons. Some of the likely reasons are: a. Rose plants may not produce viable pollen. b. Rose plants may not have functional egg. c. Rose plants may have abortive ovules. d. Being hybrids, the meiotic process may be abnormal resulting in non-Read more
Failure of fruit formation in rose may be due to several reasons. Some of the likely reasons are:
a. Rose plants may not produce viable pollen.
b. Rose plants may not have functional egg.
c. Rose plants may have abortive ovules.
d. Being hybrids, the meiotic process may be abnormal resulting in non-viable gametes.
e. There may be self-incompatibility.
f. There may be internal barriers for pollen tube growth and/or fertilisation.
The gametes of a parent do not have the same genetic composition because they do not have identical copies of DNA. In the pachytene and diplotene stages of meiosis I, the phenomenon of crossing over and chiasma formation take place between homologous chromosomes. This shifts segments of DNA from oneRead more
The gametes of a parent do not have the same genetic composition because they do not have identical copies of DNA. In the pachytene and diplotene stages of meiosis I, the phenomenon of crossing over and chiasma formation take place between homologous chromosomes. This shifts segments of DNA from one chromatid to another (homologous chromosomes) in a random manner resulting in several new combinations of DNA sequences. As a result, when meiotic division is completed, gametes possess DNA with varying degree of variations.
Which of the following statement is incorrect about transport in plants:
[C] Both (i) and (iv) Transportation & transpiration both are very important work of plant. Transport of water and minerals in xylem takes place by the process of osmosis is due to in ionic difference in concentration in the soil and inside the root. On the other hand, transpiration pull helps iRead more
[C] Both (i) and (iv)
See lessTransportation & transpiration both are very important work of plant. Transport of water and minerals in xylem takes place by the process of osmosis is due to in ionic difference in concentration in the soil and inside the root. On the other hand, transpiration pull helps in the absorption of water to the taller parts of a plant during day time when the stomata are open.
What role does pituitary gonadotrophins play during follicular and ovulatory phases of menstrual cycle and also explain the shift in steroidal secretions.
Menstrual cycle is regulated by hypothalamus through the pituitary gland. At the end of menstrual phase, the pituitary FSH gradually increases resulting in follicular development within the ovaries. As the follicles mature, Estrogen secretion increases resulting in a surge in (FSHe and LH) The surgeRead more
Menstrual cycle is regulated by hypothalamus through the pituitary gland. At the end of menstrual phase, the pituitary FSH gradually increases resulting in follicular development within the ovaries. As the follicles mature, Estrogen secretion increases resulting in a surge in (FSHe and LH) The surge of LH15 responsible for ovulation. LH also gonadotropins induces luteinisation. This leading to the formation of corpus luteum. Corpus luteum secretes progesterone and source estrogen which help in maintaining the interine endometrium for implantation.
See lessRose plants produce large, attractive bisexual flowers but they seldom produce fruits. On the other hand Lady’s finger produces plenty of fruits. Analyse the reasons for failure of fruit formation in rose.
Failure of fruit formation in rose may be due to several reasons. Some of the likely reasons are: a. Rose plants may not produce viable pollen. b. Rose plants may not have functional egg. c. Rose plants may have abortive ovules. d. Being hybrids, the meiotic process may be abnormal resulting in non-Read more
Failure of fruit formation in rose may be due to several reasons. Some of the likely reasons are:
See lessa. Rose plants may not produce viable pollen.
b. Rose plants may not have functional egg.
c. Rose plants may have abortive ovules.
d. Being hybrids, the meiotic process may be abnormal resulting in non-viable gametes.
e. There may be self-incompatibility.
f. There may be internal barriers for pollen tube growth and/or fertilisation.
Do all the gametes formed from a parent organism have the same genetic composition? Are the DNA in identical copies of the parental genome? Analyse the situation with the background of gametogenesis and provide suitable explanation.
The gametes of a parent do not have the same genetic composition because they do not have identical copies of DNA. In the pachytene and diplotene stages of meiosis I, the phenomenon of crossing over and chiasma formation take place between homologous chromosomes. This shifts segments of DNA from oneRead more
The gametes of a parent do not have the same genetic composition because they do not have identical copies of DNA. In the pachytene and diplotene stages of meiosis I, the phenomenon of crossing over and chiasma formation take place between homologous chromosomes. This shifts segments of DNA from one chromatid to another (homologous chromosomes) in a random manner resulting in several new combinations of DNA sequences. As a result, when meiotic division is completed, gametes possess DNA with varying degree of variations.
See less