Functions of blood:
1. Blood carries oxygen from and carbon dioxide to lungs, nutrients from guts, urea from the liver.
2. It contains anti-bodies, hormones, haemoglobin and many other substances.
3. It distributes heat around the body.
Answer:
A gene codes for a particular protein that is involved in the expression of a trait.
Explanation:
Characteristics determined by single genes are called Mendelian traits.
Answer:
The sample size of the animal was too small , not large enough to conclude that the effects of the chemicals on Salamander was the actual cause of toxicity and weight loss.
It is possible that the drop in weight may be as a result of other environmental factors; agitation from background noise and sudden exposure to new environments,, fluctuation in temperature of the surrounding environments , lack of feed supply or others
However, if there was many salamanders available; and most reacted to the chemical exposure in the same way then it can be concluded that, toxicity of the chemical is the causative factor.
Explanation:
1. evaporation causes cooling, similar to why sweating cools you off.
2. the cool water cools the air above it, contrasting with the hot air, this produces currents and wind which will cool you off.
I'm not sure which of those two, but one of them, if not both.
Answer:
Deforestation
Explanation:
Deforestation and/or habitat loss are a big factor of natural selection and population control.