A chemical substance that an organism requires to live. a nutrient that is scarce or cycles slowly through an ecosystem. ensures that nutrients will be circulated throughout the biosphere.
The structure of the skin is an effective barrier against bacteria. The multiple layers of epidermis, while can be invaded by foreign organisms, has a high turnover rate which means it is constantly shedding, therefore even the bacteria is shed protecting the body. Lastly, the skin's lipids maintain an acidic pH which slows and stops growth and replication of bacteria.
Answer:
The correct answer will be- 30 percent
Explanation:
Pregnancy loss or miscarriage is the natural death of the fetus or the embryo due to which the growing embryo is unable to survive.
About 70-80% of the miscarriage occurs between the first trimester or first 12 weeks of the pregnancy.
About 30-40% of all fertilized eggs get miscarried before pregnancy is known that is before implantation, 30% following implantation but prior to the missed period and 10% due to clinical miscarriage.
Thus, 30 per cent is the correct answer.
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Below are the choices that can be found from other sources:
<span>A.) DNA can store genetic information and most likely appeared before RNA.
B.) DNA is more linear than RNA and most likely appeared before RNA.
C.) RNA can catalyze biological reactions and most likely appeared before DNA.
D.) RNA is more stable than DNA and most likely appeared before DNA.
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i think the answer is A.
Answer:
Hooke frequently included microscopy demonstrations, regaling the reigning lights of English science - Newton, Boyle, Wren - with a variety of preparations. He used a number of instruments to extend the range of vision and investigate appearance and behavior at levels unseen by the unaided eye.
Explanation:
