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What are age pyramids?
Age pyramids are graphical representations in form of superposed rectangles every representing the number of individuals contained in age ranges into which a population is divided. Normally the lower age ranges are shown more to the bottom of the pyramid, always below higher ranges, and the variable dimension that shows the number of individuals is the width (there are age pyramids though in which the variable dimension is the height).
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
all about excretion
P A TTERN OF GROWTH - 1 . ISOMETRIC - In it an organ grows at the same rate as the rest of body. External form of body is not changed. eg. fish, locust. 2 .
Some ecosystems possess relatively large number of species as compared to others. This is particularly true of tropical forests which exhibit a very rich-biodiversity. For example,
What are five fin fish found in the North-East United States?
What are some of the things scientists may do to analyze data? They may use statistics to determine relation- ships among variables, compare the data with those obtained in ot
Plot the amount of DNA in the nucleus of a spermatogonia from the G1 stage prior to the first meiotic division through the completion of meiosis. Label each of the major stages of
Physiologic Adaptation Modeling is a surface specific activity (apposition or resorption) that produces a net change in the size and/or shape of the bone. It is an uncoupled pr
Onchology : This is the study of cancer. Oncology word meaning is mass, bulk & tumor. This is a branch of medicine which deals with tumors (cancer). The one who practices oncology
excretory organs in spiders?
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