Answer:
Carbon dioxide is a greenhouse gas and traps heat in the atmosphere. Without it and other greenhouse gases, Earth would be a frozen world. But humans have burned so much fuel that there is about 30% more carbon dioxide in the air today than there was about 150 years ago, and Earth is becoming a warmer place.
A) In a population of bed bugs, variation exists. Some variation provides resistance to the pesticides. Those bed bugs survive to reproduce, passing the resistance on to offspring
The brain it sends messages to the spinal cord which aids for the movement of the body
spinal cord aids for movement
Rose, shoot system, stem, xylene, tubules cell, meristematic cell
<span>Virues are different from bacteria, fungi and parasites, beacuse they can not survive without the presence of a host organism.They need a host to reside into, replicate, obtain nutrition and thrive. Outside host, they are just present as proteins or capsids. </span>