The formation of the first cells is common in both hypotheses.
A) a common ancestor
Homologous structures are structures that are similar in related organisms. There is a basic pattern of bones which can be inherited from a common ancestor
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.
Answer:
Option A
Explanation:
They belong to the same group of the periodic table. This is because their atoms have the same number of electrons in the highest occupied energy level.
Answer:
a.energy source ,either sunlight or chemicals
Explanation:
the animals using sunlight are known as photoautotrophs and the animals using chemicals are known as chemoautotrophs.
