Comparing the fossils through the geologic time scale, starting with the Precambrian and going towards the Quaternary, we can see that the fossils of the animals and the plants have gradually been becoming more and more complex.
While in the Precambrian period the living organisms have been relatively simple, most of the animals being covered with exoskeletons, living in water, the diversification much smaller, and the plants still being very primitive, in the periods that follow there's great changes. The plants become bigger and more complex, developing new way of life, while the animals develop bone structures inside their bodies. The diversification explodes. The living organisms grow in size, develop special and unique features, live in pretty much every environment.
Answer: Cloning could allow us to produce the perfect human race - one which was hardy enough to withstand all diseases. We could create a world where every human lived to old age without the genes which create psychological or physical problems. and why they are bad because A new study on cloning shows more than ever it's probably a very bad idea to replicate human beings. The study, performed by researchers at the Whitehead Institute for Biomedical Research in Boston, found that cloning to create new animals will almost always create an abnormal creature.
Explanation:
Answer:
The pressure differences on either side of the valve.
Explanation:
The heart valves open and close passively because of pressure differences on either side of the valve. When pressure is greater behind the valve, the leaflets are blown open and the blood flows through the valve. However, when pressure is greater in front of the valve, the leaflets snap shut and blood flow is stopped.
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<span>The process is known as voiding cystourethrography.
In this process the urethra of a person is filled with radio waves blocking substance also known as radiocontrast substance commonly used agent is diaziotic acid.
They Xray study is done of urethra when the person empties his bladder. The report is then made which tells if there is any problem with urethra.</span>
The main relationship between emerging scientific ideas and open-mindedness is that for many new ideas to be accepted a population has to have an open mind, otherwise the new ideas are rejected without thought.