As a result of its involvement in a reaction, an enzyme is unchanged.
Enzymes are catalysts that speed up chemical reactions that occur within the biological systems (they increase the reaction rate by lowering its activation energy). Enzymes react with substrate that binds to them (key-lock mechanism) and convert the substrate into the product. Most of enzymes are proteins by their structure but a few are catalytic RNA molecules-ribosymes.
Enzyme activity can be affected by other molecules (activators and repressors), pH, temperature etc.
Answer:
The correct option is A) laws that banned the hunting of passenger pigeons to sell in new markets
Explanation:
All other options describe ways that enabled passenger pigeons' extinction. Laws to ban hunting these pigeons had the opposite effect, that is saving the species from extinction.
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Answer:
In sexually reproducing organisms, the number of chromosomes in the body (somatic) cells typically is diploid (2n; a pair of each chromosome), twice the haploid (1n) number found in the sex cells, or gametes. The haploid number is produced during meiosis.
An essential nutrient<span> is a </span>nutrient<span> that the body cannot synthesize on its own -- or not to an adequate amount -- and must be provided by the diet. These</span>nutrients<span> are necessary for the body to function properly. On the other the non-essential ones cannot be made inside the body so they are acquired from the food we eat.</span>
<span>Plantae (the plants)Animalia (the animals)Fungi (for instance, toadstools and mushrooms)Monera (bacteria and blue-green algae)<span>Protista (for instance, microscopic organisms called protozoa).</span></span>
