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Explain what is DNA?
DNA: DNA is the source of the information that directs the development of the cell. Although all segments of DNA are not active in every cell in the human body, every cell has a complete copy of DNA from both parents, comprising 23 sets of chromosomes.
In human cells, heat, radiation, chemicals, and other factors can damage DNA. However, the cell has specific repair enzymes that are highly effective in repairing DNA damage.
Sex-Limited Traits Sex Limited Traits are traits expressed only in one sex, although the genes controlling thcm arc prcscnt as wcll as transmitted to both thc sexes. Therefore,
In the preceding section we emphasised the fact that cvolution or the continuous adaptations to the environment can take place only when pheiiotypes exhibit variability. In the abs
The various types of white blood cells are sometime together referred to as: a) Erythrocytes (pron: eh-rith-row-cites) b) Erythroblasts (pron: eh-rith-rah-blast) c) Leuko
what is life process
Birth control pills maintain a high blood level of estrogen and progesterone. What is happening in the ovary when the blood level of estrogen is high? How is the uterus responding?
1. Road traffic: of all the sources of noise pollution, road traffic is the most prevalent and perhaps the most damaging source of pollution. More people are exposed to noise
The Polymerase Chain Reaction Kary Mullis established the technique of the polymerase chain reaction (PCR) in the year of 1983. He won a Nobel Prize for the procedure in the ye
Snakes Non-poisonous snakes can be brought into the classroom for observation. The diagram shows how a safe cage can be made for keeping a snake. The bottom should be covered w
How did the first fermenting autotrophs appeared? What about the first aerobic beings? A heterotrophic hypothesis asserts that the first living beings were the fermenting heter
Define Defensive Proteins - Biological Functions of Proteins? These proteins protect in opposition to diseases. Antibodies are the instance of defensive proteins. These combat
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