Understanding Cells, The Basic Units of Life cells make up the smallest level of a living organism<span> such as yourself and other living things.
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Answer:
hydrogen bonds
Explanation:
The two strands are held together by hydrogen bonds between the bases.
Answer:
gametes are reproductive cells such as sperm and eggs. as gametes are produced the number of chromosomes must be reduced by half.
Explanation: why? the zygote must contain genetic information from mother and from father cells so the gametes must contain half of the chromosomes found in normal body cells.
The scientific method is a problem-solving approach used in Biology and other scientific disciplines. This method has five basic steps which help scientists test their hypotheses. The first step of the scientific method is to make an observation. In this particular example, the scientist observes probably that salt has chemical and physical properties which could affect the life cycle of bacteria. The second step would be to ask a question and that would be to ask whether salt indeed has any effect on that particular type of bacteria that he/she studies. The third step would be to form a hypothesis and that would be to state that the specific bacterial type will be strongly affected by the salt. The fourth step would be to predict that if the scientist exposed this bacterial type to a salty environment, the bacteria would not survive. The fifth and final step is to test this prediction and if the bacteria do not survive, then the scientist can conclude that salt affects this bacterial type.
The oldest meteorite<span> fragments found on </span>Earth<span> are about 4.54 billion years old; this, coupled primarily with the dating of ancient </span>lead<span> deposits, has put the estimated age of Earth at around that time.</span>[38]<span> The </span>Moon<span> has the same composition as Earth's </span>crust<span> but does not contain an </span>iron<span>-rich </span>core<span> like the Earth's.</span>