C. Gradual
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Answer:
B) 25% but to be exact 24.7%
Explanation:
The halflife of 235U is 704 million years. 1420 million years is approximately two halflives, so about 24.7% would be remaining.
The statement that describes the acquired immunity is obtaining immunity from an outside source like mother to baby.
<h3>What is immunity?</h3>
Immunity is the process by which the body defends itself against foreign bodies like pathogens.
Immunity can be of the following types:
- Acquired immunity
- Natural immunity
Acquired immunity is the type of immunity that is developed over a life time while natural immunity is inherently possessed.
Therefore, the statement that describes the acquired immunity is obtaining immunity from an outside source like mother to baby.
Learn more about acquired immunity at: brainly.com/question/1379924
Answer:
The term “epigenetics” was introduced in 1942 by embryologist Conrad Waddington, who, relating it to the 17th century concept of “epigenesis”, defined it as the complex of developmental processes between the genotype and phenotype.
Explanation:
Answer:
10,000 years
Explanation:
Fossils are defined as the remains or traces of organisms that died more than 10,000 years ago, therefore, by definition the minimum time it takes to make a fossil is 10,000 years. But, that is just an arbitrary line in the sand – it means very little in terms of the fossilisation process.