Answer:
1. it's an atom
Explanation:
An atom is the smallest particle of an element, having the same chemical properties as the bulk element. The first accurate theory explaining the nature of matter was Dalton's Atomic Theory: 1. All matter is composed of atoms, and atoms are indivisible and indestructible.
Answer: <u>Option 4; Oxygen gains electrons and hydrogen to form water.
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Respiration is a process where glucose is used and energy is released stored in this molecule. Oxygen is used during respiration as well and it gains the electrons and hydrogen to form water. And, gain of electrons is an oxidation reaction. So answer is option 4.
Since, oxygen is consumed during respiration, option 1 is incorrect.
Loss of electrons is reduction, so option 2 is also incorrect.
Glucose is used in respiration, thus option 3 is incorrect.
Genetically Modified bacteria can be harvested for Insulin using the process Mitosis and doing so they can asexually reproduce identically and make clones making them all have the insulin producing gene. If you would like a better explanation, it won't bother me if you ask:)
1. A : forming oxide and react with alkali
3. C : replacement reaction
4. C : in neutralisation the product is always water and a salt
