True. vaccines will make you sick, so that your body may become better at identifying sicknesses later and become immune to such sickness
Answer:
biological species concept
Explanation:
The biological species concept is the most commonly used and acceptable definition of species, which explains that a group of organisms can be referred to a species if members of the group can interbreed successfully to produce viable offspring that are also fertile. It explains that there tend to be reproduction barriers that would prevent different species of organism from successfully interbreeding. Also, that two organisms have the same appearance, do not necessarily mean they belong to the same species. For example, a horse and a donkey were interbreed to produce an offspring called the mule, but, the mule was found to be infertile. A horse and a donkey are different species, even though they have close appearance.
<span>It is true that the chromosome is the sex determiner for many species. There are two types of chromosome - X, which determines the female sex, and Y, which determines the male sex. Based on these chromosomes, the child will either be a man or a woman. There are some cases where a person has only one type of a chromosome, X, when they are considered to be an 'inter sex,' although resembling females more. This is different that the usual set of chromosomes - XX for female, and XY for male.</span><span />
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