Answer:
In science a hypothesis is useful only if it can be <u><em>tested</em></u>.
Explanation:
In a scientific experiment, a hypothesis can be described as a tentative experiment that can be tested through observations and experimentation. The results inferred from the experiments can prove whether a hypothesis was correct or wrong. Hence, a hypothesis is a very important part for the scientific method of research. The validation of a hypothesis through experimentation brings about theories, facts, laws etc. A hypothesis is made in response to a scientific question.
<span>I suspect this question should read "How long does a red blood
cell live." A red blood cell lives for between 100 and 120 days. It
takes 7 days for a new red blood cell to develop from stem cells. Stem
cells are similar to base cells. They can also be seen as a general
template from which specialized cells are made. Stem cells can be taken
from a newborn baby's umbilical chord or extracted from an adult blood
donor's blood.</span>
Answer: number 1 Your bronchioles are some of the smallest airways in your lungs. Inhaled air passes through tiny ducts from the bronchioles into elastic air sacs (alveoli).It A For two is A and for 3 is false
Answer:
Pheomelanin
Explanation:
Dark-skinned individuals produce more melanin than those with pale skin.
