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Sertoli cells are found in:
1. ovaries and secrete progesterone
2. adrenal cortex and secrete adrenaline
3. seminiferous tubules and provide nutrition to germ cells
4. pancreas and secrete cholecystokinin
Seminiferous tubules and provide nutrition to germ cells
Q. How are the male gametes and the male gametophytes formed in angiosperms? In the anthers of every stamen there are pollen sacs. Inside the pollen sacs there are microspore m
ACCESSORY GLANDS - 1 . PROSTATE GLAND - One in number, 4-5 lobed, it forms 15-30% of semen.Citric acid, lipid, acid phosphatase spermin, fibrinolysine are present.
Explain metachrosis in frogs? How it is different from change of skin colour of chemleon?
uses of bacteriophage?\
PHYSICAL STATE OF PROTOPLASM Several theories have been given about its physical structure - (i ) Granular Theory (Proposed by Altman, Hanstein, 1886) - Granules embed
Plankton - Aquatic Ecosystem This group includes both microscopic plants (phytoplankton) and animals (zooplankton) found in all aquatic ecosystems, except certain swift moving
How does the production of acorns by oak trees affect Lyme disease in humans? When more acorns are produced by oak trees the populations of mice and deer that eat acorns enhan
classification tree for pisces
Q. What are the major orders of placental mammals? What are a few representative species and distinguishing features of each of those orders? The orders into which placental ma
Clone (verb) is the action of duplicating the genetic material within a vector. To clone the piece of DNA, one would insert it into some type of the vector (like, a plasmid) and p
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