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Q. How do birds reproduce?
Birds like every vertebrate have sexual reproduction. Their embryos develop within shelled eggs containing extraembryonic membranes and exterior the mother's body.
Birds copulate. Fecundation is interior and it occurs only before the female gamete is involved by the calcareous eggshell.
Radial and Biradial-Metazoa Radial symmetry is the symmetry in which the parts are so arranged around a central axis or shaft, like the spokes of a wheel, that any vertical c
Binary Fission - Types of Asexual Reproduction Binary fission is a procedure in which an organism divides mitotically into two equal individuals which are generally identical
Q. Optional use values of biodiversity? Optional values are associated with potential use in the future. Accordingly one opts to conserve biodiversity based on the hope that it
Disability evaluations after injuries: (a) Explain the following terms: "duration of disability" and "degree of disability". (b) Explain how degrees of disability after injur
There is a lot of dataset and hypothese that attempt to explain why there was a Cambrian Explosion. Using all supporting ideas, explain and write a paragraph on why all this specia
writE advantages and advantages of protoza
Syngamy The pollen tube grows to a very limited extent in the synergid. It releases the contents either through a terminal or a subterminal pore. The contents include the two
MOSAI C THOERY - It was given by W. Roux. He studied the development of frog's egg. He destroyed one cells by a hot needle out of 2-cells formed as a result of first cleava
A biologist examines a series of cells and counts 140 cells in interphase, 10 cells in metaphase, 4 cells in anaphase and 7 cells in telophase. if complete cell cycle requires 24 h
Chromosomes, coloured bodies, are composed of proteins and DNA; so are chromatids. At metaphase I there are 46 chromosomesaligned in pairs along the human cells equatorial plate. A
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