Answer:
A biologia abrange diversos campos, incluindo botânica, conservação, ecologia, evolução, genética, biologia marinha, medicina, microbiologia, biologia molecular, fisiologia e zoologia.
Explanation:
B. Anions have more electrons than protons, giving them a negative charge.
D. Cations have more protons than electrons, giving them a positive charge.
Explanation - Ions are the result of atoms or molecules that lose or gain electrons. If an atom or a molecule is positively charged then it is called as cation and if it has negative charge then it is called as anion.
Cations have positive charge because the atom has lost its electron while anions have negative charge because the atom has gained the electron. The number of protons is more than the electron in cations and less in anions.
Answer:
D. Because science only uses facts that are proven 100% true through the use of variables.
Explanation:
All the knowledge we read is science books are not merely some observed facts but the result of a systematic scientific methodology through which facts are tested. Science only gives us that knowledge as facts which is proven 100% true through the use of variables.For example: if a scientist has studied the effect of salt stress on the growth of plants and he got the results in form of graphs which show that growth of salt treated plants in very less than normal plants. Then he needs to draw conclusion after consulting relevant previous experiments and say that salt stress hinders growth and why? with reasonable logic.
Variables are the things hat he changes like environmental conditions in previous example to see that in changed conditions plant is showing changed behavior. This way a scientist strengthens his results. Therefore, we can say that whatever knowledge we get through science is proven 100% true through the use of variables.
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A food chain is the order in which we can see which predators eat which prey. Food chains are easier to understand at a glance then a food pyramid.
Answer AND Explanation:
Mutation is a spontaneous change in the DNA. Gene mutation refers to changes in the nucleotide sequence in a particular gene while chromosomal mutation are changes in the gross structure of chromosomes.
During transcription or translation, RNAs are formed which are not heritable. Many copies of RNA are produced and a single bad one is not a big problem to the organism. Mismatch repair enzymes can fix any errors that were missed by the polymerases during transcription.