A. Define:
(1) Combustion
(2) Flora
(3) Endangered species
(4) tissue
(5) Reproduction
(6) Adolescence
(7) Noise pollution
Answers
A chemical reaction in which substance reacts with oxygen to produce heat energy is called combustion.
The plants found in a particular area are termed as flora
Endangered species are those whose numbers are diminishing to a level that they might face extinction.
A group of similar cells performing a specific function is called tissue.
Reproduction means to reproduce. It is a biological process by which an organism reproduces an offspring who is biologically similar to the organism.
Adolescence is a highly sensitive period between childhood and adulthood.
Presence of excessive or unwanted sounds in the environment is called noise pollution.
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ANSWER
1) Combustion: Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.
2) Flora : The word "flora" refers to the plants occurring within a given region as well as to the publication of scientific descriptions of those plants. A Flora may contain anything from a simple list of the plants occurring in an area to a very detailed account of those plants.
3) Endangered Species : Endangered species, any species that is at risk of extinction because of a sudden rapid decrease in its population or a loss of its critical habitat. Previously, any species of plant or animal that was threatened with extinction could be called an endangered species.
4) Tissue : Tissue, in physiology, a level of organization in multicellular organisms; it consists of a group of structurally and functionally similar cells and their intercellular material
5) Reproduction : Reproduction is the biological process by which new individual organisms – "offspring" – are produced from their "parents". Reproduction is a fundamental feature of all known life; each individual organism exists as the result of reproduction. There are two forms of reproduction: asexual and sexual.
6) Adolescence : Adolescence is the period of transition between childhood and adulthood. It includes some big changes—to the body, and to the way a young person relates to the world. ... Understanding what to expect at different stages can promote healthy development throughout adolescence and into early adulthood.
7) Noise pollution : Noise pollution, also known as environmental noise or sound pollution, is the propagation of noise with ranging impacts on the activity of human or animal life, most of them harmful to a degree. The source of outdoor noise worldwide is mainly caused by machines, transport, and propagation systems.