TT and Tt are possible genotypes of a tall pea plant as the resulting phenotype of both possible genotypes result in a tall pea plant.
Answer:
options B, E and F
Explanation:
A damage to the medulla oblongata is usually fatal and can also lead to death because it controls vital autonomic functions in the body which includes breathing and heart rate.
The Broca's area is associated with language production and damage to this area can lead to inability to express language (Broca’s aphasia).
A blow to the back of the head might affect the occipital lobe that is associated with visual co-ordinations. Thus damage to this area might not affect the gustatory cortex as this is found in the region of the frontal lobe and not the occipital lobe.
The primary motor cerebral cortex on the left side of the brain controls movement of the right side of the body, and vice-versa, the right motor cortex controls movement of the left side of the body.
The answer is D. phobias. The little Albert experiment demonstrated that emotional responses can be conditioned in human beings. The 9 months boy was exposed to different stimuli which included a rabbit, masks, a white rat, burning newspapers and a monkey. After some time he was exposed to the white rat and later a loud noise of metal was made and it scared the boy. This exposure was repeated and eventually the boy became afraid of white furry things including animals.
Answer:
Krypton is a noble gas, so it was difficult for chemists to find it, as though it was a secret
Explanation:
Krypton is a noble gas and this demand it has full orbital electron shells (2.8.18.8 or [Ar].3d¹⁰.4s².4p⁶). They, therefore, do not have an affinity for gaining or losing an electron hence rarely react with other elements. They were therefore hard to discover by early chemists because there were no known compounds of this gas and other noble gases. This is why the name ‘hidden’.
Answer:
Advantages of using ethanol as fuel
A. It is a carbon-neutral activity
C. It does not produce toxic gases when burnt
D. It can be mixed with conventional petrol to make gasohol
Disadvantages
B. It takes a lot of plant materials to produce the ethanol
Explanation:
It has been proven that blending ethanol with conventional petrol produces gasohol and this helps to reduce the harmful emissions of CO, hydrocarbons, etc. This then means that vehicles that run on ethanol produces fewer harmful emissions than those that run on gasoline. For ethanol, it produces a no net carbon dioxide emissions.
Ethanol is considered to be atmospheric carbon neutral when the combustion of ethanol is made from biomass (such as sugarcane and corn). Ethanol is made plant materials like grains and crops that possess high starch. Also, it can be made from sugar content such as sugar cane, sorghum, corn, barley and sugar beets.