Half-life = time in which half of material is lost
1/4 = 1/2 x 1/2 so 2 half lives have gone by if only 1/4 of it is left.
age of rock = 2 x half life = 2x1.3 = 2.6 billion years.
Answer:
Summary. The photosynthesis chemical equation states that the reactants (carbon dioxide, water and sunlight), yield two products, glucose and oxygen gas. The single chemical equation represents the overall process of photosynthesis.
Answer:
Adrenocorticotropic hormone is a polypeptide tropic hormone produced by and secreted by the anterior pituitary gland. It is also used as a medication and diagnostic agent. ACTH is an important component of the hypothalamic-pituitary-adrenal axis and is often produced in response to biological stress.
<span>a basic difference
between Mendel's p</span><span> <span /><span> but not the
particulate hypothesis, maintained that after a mating, the genetic
material provided by each of the two parents is mixed in the offspring,
losing its individual identity. </span></span><span /><span><span><span /></span></span>is and the blending hypothesis?
