Answer: True.
Explanation: Environmental scientist studies the interaction of the living components of the ecosystem with the non living components.
The contamination in the soil will affect the growth of plants, this will also be studied by the environmental scientist.
The Growth of the plant depend on the quality of soil in which it is grown so it will also be a concern for the environmental scientist.
it is true ........................................
B. an organ malfunction.
C. an allergic reaction.
Answer:
C. an allergic reaction
Explanation:
Pollen can generate an immune response which is known as hypersensitivity. Hypersensitivity is an uncontrolled and unregulated immune response. Pollen generates IgE mediated type I hypersensitivity which causes acute inflammation in the body which ultimately result in wheals and flares on the skin. It causes hyper activation of mast cells and basophils which cause vasodilation by releasing molecules like leukotrienes, serotonin and prostaglandins. Asthama and atropic dermatitis are the two diseases which occur due to pollen allergies.
Ans.
The process that involves exchange of genetic material between homologous chromosomes, is known as crossing over. It occurs during meiosis I (between prophase I and metaphase I).
Crossing over is responsible for the variation in organisms as it makes new genetic combinations in the offspring that are absent in either parents and thus, contribute to genetic diversity.
Thus, the correct answer is 'crossing over.'
The enzyme can't bind to the substrate.
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