The damage to ozone layer is caused by
Oxygen
Nitrogen oxide
Chlorofluorocarbons
sulphur dioxide
Correct answer is C
Ozone sits in the upper atmosphere and absorbs ultraviolet radiaton, another type of solar energy that's harmful to humans, animals, and plants. CFCs and halons cause chemical reactions that break down ozone molecules, reducing ozone's ultraviolet radiation-absorbing capacity
Chlorofluorocarbons (CFCs) and other halogenated ozone depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion.
Name the blood cells in which nucleus is absent
Lymphocytes
Blood Platelets
Monocytes
Eosinophil
Correct answer is B
Like red cells, platelets (thrombocytes) have no nucleus. However, unlike red cells that originate in the marrow as nucleated cells and lose their nucleus, platelets are produced by budding off from a giant multinucleated marrow cell called a megakaryocyte.
Phytology
Phycology
Pedology
Plantophyta
Correct answer is A
Phytology is the branch of biology that studies plants.
Etiolation is caused by the influence of
Mineral Salts
Water
Carbondioxide
Light
Correct answer is D
Etiolation is a process in flowering plants grown in the partial or complete absence of light. It is characterized by long, weak stems; smaller leaves due to longer internodes; and a pale yellow color.
Examples of micronutrients include the following except
Vitamin A
Vitamin B6
Biotin
carbon
Correct answer is D
Carbon is a macronutrient.