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Indicating the name and respective ploidy of each involved cell how can the formation of egg cells from germ cells be described?
The formation of egg cells starts with a germ cell called oogonium (2n) that undergoes mitosis and gives birth to the oocyte I (2n). The oocyte I undergo meiosis I that however is interrupted at prophase. After puberty during every menstrual cycle an oocyte I finishes the meiosis I and obtain one oocyte II (n) and the first polar body (n). With fecundation the oocyte II then undergoes meiosis II and creates the mature egg cell (n) and the second polar body (n).
How do CAM plants vary from both C 3 and C 4 plants? CAM plants open their stomata at night, while C 3 and C 4 plants open their stomata during the day.
Explain the concepts of brain development Two concepts that are especially critical to understanding brain development in the very young child are: Symbolic representati
Q. Cows swallow their food once and then this food goes back to the mouth to be chewed again. How can this phenomenon be explained? The food ingested by cows and other ruminant
Q. Introduction of Quality Attributes of Food? Seasonal fruits and vegetables are grown in plenty, and are available in their respective seasons in abundance. While choosing th
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Name four substances that have to be excreted from the body. Substances that have to be excreted from the body are:- A) Carbon dioxide, B) urea, C) uric acid, D) s
How did the industrial revolution in England offer an example of natural selection? One of the classic instances of natural selection is regarding the moths of industrial zones
What is the plant hormone remarkable for stimulating flowering and fruit ripening? What are the uses and practical inconveniences of that hormone? The plant hormone notable for
Theodosius Dobzhansky and Boris Spassky demonstrated the working of normalising selectioion a behavioural trait in two populations of Drosophida pseudobscura. The two populatiors w
In a word, what process provides the energy for muscle contraction
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