P-1 Carbon Compounds — Science STD 10 — Question

Explain in brief the sensitive issues of general public about disaster.
(OR)
Which are the three aspects of disaster tjiat are important for common citizens?

Obtain the mathematical expression for the heat generated in a metallic conductor by electric current (Joule’s law).

Draw a neat labelled diagram of the human excretory system.

A, B and C are three living organisms. The organism A is a unicellullar fungus which can live without air. It is used in the commercial production of an organic compound P from molasses. The organism B is a unicellular animal which lives in water and feeds and moves by using pseudopodia. It breathes through an organelle Q. The organism C is a tiny animal which acts as a carrier of malarial parasite. It breathes and respires through a kind of tiny holes R and air - tubes S in its body.

1. What are organisms A, B and C?
2. Name P, Q, R and S.
3. Which organism/ organisms undergo aerobic respiration?
4. Which organism/ organisms undergo anaerobic respiration?

What is forest fire? What is its effect on environment?

Answer the following questions in complete sentence based on female reproductive system:
i. How many immature oocytes are present at the time of birth in the ovary of female foetus?
ii. What is ovulation?
iii. What is menopause?
iv. Draw scientifically correct diagram of female reproductive system.
v. Label the following parts:
a. Ovary
b. Uterus

Reproduction is the process by which the living species continues its existence. Lower organisms carry out asexual reproduction while higher plants and animals always show sexual reproduction. Plants reproduce asexually by methods such as fragmentation, vegetative propagation, budding, spore formation. For sexual reproduction they form gametes. In animal kingdom, budding, fission of different types and parthenogenesis are some of the methods that do not require both the sexes. Though regeneration also forms new individual, it is not considered to be a reproductive process because, basically it is a repair process. The ability to regenerate is lost in higher phyla. In human beings | it is restricted only to wound healing. Sexual reproduction is also undergoing lots of experimentation such as cloning which may make females capable of producing their own baby without intervention of any male.
Questions and Answers:
(1) How do living species continue their existence?
(2) Which are asexual methods of reproduction in kingdom Animalia?
(3) Why is regeneration not true method of reproduction?
(4) What are methods of reproduction in plants?
(5) What is the modern method of reproduction aimed at in higher organisms?

What is alcoholism? What are its effects?

Remediation is the process of removing dangerous or poisonous substances from the environment, or limiting the effect that they have on it. When any biological organism is used for remediation, it is called bioremediation. When plant species are used for the purpose of remediation, it is called phytoremediation. When any microbes are used then it is named as microbial remediation. The methods of such remediation have helped to clean the environment from toxic effluents, especially sewage and crude oil. Dr. Anand Chakraborty, a scientist of Indian origin, has worked on Pseudomonas aeruginosa which have reduced the crude oil films into carbon dioxide and water.
1.What is the meaning of remediation?
2.What is the difference between phytoremediation and microbial remediation?
3.Which environmental pollutant is mainly removed through bioremediation processes?
4.What is the role of Pseudomonas aeruginosa?
5.Why Dr. Anand Chakraborty’s work phenomenal?