If not parents had a recessive type O allele, they would have a 1/4 or 25% chance of having a child with type O blood
The earth began as a cloud of dust and hot, shining gas. When our planet began to cool, its surface solidified, surrounded by clouds of water vapour. When this vapour condensed (changed into liquid) and began to fall like rain, seas, and oceans formed in the hollows of the Earth’s surface. Oceans are huge expanses of water which separate the Earth’s continents. The largest ocean is the Pacific Ocean, second, the Atlantic and third largest, the Indian Ocean. Seas are smaller expanses of water, almost always flowing either into oceans or other sea. The waters of the seas and the oceans are always salty, because they are rich in mineral salts and especially sodium chloride, which is the salt used in cooking.
Plants grown in typical soil are the control.
<h3><u>Explanation</u>:</h3>
The experiment is a process which includes the testing of effects several substances on a known event. Here in this experiment, the effect of salt concentration in soil on the plants are to be studied.
Control is a set of results that are kept for better verification of the results of the experiment. Here the control is kept in ideal or typical conditions and the effect on the plants are tallied with that of plants from experiment.
So the control here should be those plants which are grown in normal soil. Or soil of the environment where the plants are indigenous.
Answer:
Vector changes with geography.
Explanation:
Vectors of disease are changing with the changing in the geographic location because different vectors survives in different environment so due to change in geography, vectors of a disease also change. Vectors refers to organisms that is responsible for carrying infectious bacteria or viruses that causes certain diseases in animals, plants and humans. Different vectors are present in different geography due to different climatic condition that forbit one vector to survive in all environments.
