Answer:
The correct answer will be option- is characterized by exaggerated vasoconstriction in the extremities
Explanation:
Raynaud's disease is the condition caused when the blood vessels react in an exaggerated way to the emotional or cold stress.
The condition occurs to maintain the temperature of the body in the normal range as in cold conditions the blood vessels constrict to maintain the warmth of the body inside the heart, brain and the vital organs.
The blood vessels undergo vasospastic attack by blocking the flow of blood causing the skin to turn red, blue or white.
Thus, the selected option is the correct answer.
Adaptation is a response to the environment but long term.
For example:
<span>A wolf has a fur coat as an adaptation to the cold weather, but birds migrating south is a response to cold weather.</span>
Answer:
The correct option is A. <u>Water (liquid energy) to oxygen (chemical energy) to ATP (chemical energy)
</u>
Explanation:
Photosynthesis can be described as a process by which plants use light energy to convert water and carbon dioxide into glucose and oxygen. Oxygen is produced as a by-product for this reaction.
In the reaction of photosynthesis, water releases it's oxygen atom. 6 oxygen atoms are produced as the result of photosynthesis. The oxygen and glucose are used by the cells to carry out cellular respiration and generate ATP. Hence, A is the correct option.
As light energy doesn't change in this reaction, hence options B and C are false.
Answer:
yes
Explanation:
The sugar-phosphate backbone forms the structural framework of nucleic acids, including DNA and RNA. This backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.
Answer:
Crop rotation
Explanation:
Plant obtain nutrients from the soil. Plantation of crops in soil depletes nutrients from the soil. Crop rotation is one of the methods used for maintaining the nutrient levels and thereby, the productivity of the soil. Crop rotation includes plantation of different crops in the same field. For example, farmers plant legume crops after the non-legume crops. Leguminous plants have Rhizobium bacteria in their root nodules. These bacteria fix nitrogen and restore the lost nitrogen from the soil.
