<span>Two types of sex cells are
> Sperm (in males)
> Egg or ovum (in females)
Sperm is produces in the testes.
Ovum or egg is produced in the ovaries.</span>
The study of EARTH SCIENCE involves the study of the natural world.
Earth science is a branch of science which deals with the study of physical components of the earth and its atmosphere. Earth science as a subject is divided into many branches such as geology, astronomy, meteorology, oceanography, etc. The study of earth science is targeted at understanding the present characteristics and the past evolution of the earth.
Natural organic compounds produced by plants that are poisonous, particularly to insects, are known as <u>Botanicals</u>.
Botanical insecticides are naturally occurring chemicals (insect toxins) extracted or derived from plants or minerals. They are also called natural insecticides. Organic gardeners will choose these insecticides, in some cases, over synthetic organic materials.
Pesticides are substances that are meant to control pests. This includes herbicide, insecticide, nematicide, rodenticide, bactericide, insect repellent, fungicide, and lampricide.
Examples of plants that are sources of commercially available botanical pesticides include pyrethrum (Tanacetum cinerariifolium), neem (Azadirachta indica), sabadilla (Schoenocaulon officinale), tobacco (Nicotiana tabacum) and ryania (Ryania speciosa)
To learn more about natural insecticides, here
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