If the birth rate in a population is 40, and the death rate in that population is 15, then the population will be experiencing growth. The growth will be 25 on every 1,000 people. If this trend continues for longer period, then the population will start to become younger and younger, making the basis of the population pyramid wider, while the top part of it smaller and smaller. This demographic situation in modern times seems to be present only in the less developed countries, with the majority of the transitioning countries having much decreased population growth, and the more developed countries having more deaths than births, thus being aging populations.
<span>The Human Genome Project had a very negative effect due to development
in technology and academic rivalry. With knowledge came bitter rivalry and with
technology came the tendency to become God. These angles greatly created
negative impact about this project. The experts tried to create human clones,
tissue engineering etc. The scientists
tried to analyze a person and get rid of any future disease that might attack
them. Some people feel this is good while others feel that it is like
distorting the natural process. </span>
All of the above u are welcom
Spores are small single cell structures that are capable of growing into new organisms under the proper condition
<span>Seeds reproductive structures of more than one cell</span>
During exercise, a number of changes occur to maximise the body's oxygen intake. Firstly our heart rate/ pulse increases. This is due to the heart beating much faster and more forcefully to pump blood faster around the body.
Our breathing rate increases to intake more oxygen and exhale more CO2.
The smooth muscle in our trachea and bronchi relaxes to increase the lumen size thus making breathing easier. Adrenaline may also be released leading further amplifying these changes as well as reducing blood flow to the gut and thus peristalsis occurs at a much slower rate.
Also when we exercise we respire more, producing heat, which must be expelled. This may be done through sweating. Another physiological change that occurs is vasodilation of arterioles closer to the skin to allow more blood to flow closer to the skin, allowing more heat to radiate out.
