1) which reaction takes place in mitochondria? which molecules produced in this reaction? which co-enzymes take part in this reaction?
2) what is binnary fission? which are its types?
3) what are vestigial organs? write two examples.
4) write note on sperm bank.
5) define connecting like and give two examples.
6) which are 7R?
7) write advantages and limitations of solar.
Answers
Question:
which reaction takes place in mitochondria?
which molecules produced in this reaction?
Answer:
oxidative phosphorylation
Explanation:
The chemical reactions takes place in mitochondria is Oxidative phosphorylation and it happens inside the mitochondria. It is a process of conversion of oxygen to water. It comprises an enzymatic series of electron donor and acceptors which releases energy.
Question:
what is binnary fission? which are its types?
Answer:
Binary fission is a type of asexual reproduction where a single living cell or an organelle grows twice its size and then splits into two identical daughter cells, where each of these daughter cells has the potential to grow into the size of the original cell or organelle.
Question:
what are vestigial organs? write two examples.
Answer:
The organs present in the body which is non-functional and is incompletely developed are vestigial organs."
The examples of vestigial organs - Wisdom teeth, vermiform appendix, ear muscles, coccyx, caecum, nictitating membrane etc. in human are the examples of vestigial organs.
Question:
write note on sperm bank.
Answer:
A sperm bank, semen bank or cryobank is a facility or enterprise which purchases, stores and sells human semen. The semen is produced and sold by men who are known as sperm donors. The sperm is purchased by or for women for the purpose of achieving a pregnancy or pregnancies other than by a sexual partner.
Question:
define connecting like and give two examples.
Answer:
Connecting link is an organism having characteristics of two different group of organisms e.g, duck-billed platypus ( scientific name Ornithorhynchus anatinus) is a connecting link between reptiles and mammals i.e, it has mammary glands to feed its young ones like other mammals e.g human being, cow, buffalo etc., and it lays hard-shelled egg with a large amount of yolk like reptiles , so duck-billed platypus is a connecting link between two evolutionary groups viz., reptiles and mammals.
Question:
which are 7R?
Answer:
They are reuse, repurpose, rot, repair, return, refill and refuse which are also called the “7 R's.
Question:
write advantages and limitations of solar.
Answer:
Advantages :
(1) While generating the power through solar radiations, no fuel is burnt.
(2) Solar energy generation thus does not create any type of pollution. The technology can be completely utilized in regions with abundant sunlight.
(3) Solar energy is eco-friendly, green energy.
Limitations:
(1) Sunlight is available only during day time. Thus solar cells can generate power only during day.
(2) In rainy season and in cloudy conditions, solar power generation suffers.
(3) The power present in the solar cells is DC while most of the domestic equipments work on AC.