What male structures serve only for excretion

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Q1. Where in a body do sperm and urine share the similar passage? What male structures serve only for excretion, which only for reproduction, which for both?

Q2. Throughout the development from zygote to maturity, a bean plant forms the structures: stem secondary roots, vascular cambium, embryo sac, cotyledons. Describe briefly the development origin of each of the five. Describe briefly the functions of each of the five.

Q3. When a sperm cell comes into contact with an egg cell, there is a change in the electrical charge across plasma membrane and various channel proteins close. What are these channels known as?

Reference no: EM136570

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