The DNA code contains instructions needed to make the proteins and molecules essential for our growth, development and health.
Answer:
Trophic cascade is defined as an ecological phenomenon triggered by the addition or removal of top predators and involving reciprocal changes in a relative population of predators and prey through food chain, which often results in dramatic changes in the ecosystem structure and nutrients cycling.
Explanation:
An example was the removal of wolves in Eastern North America which was associated with an increase in white tailed deer and a decline in plants eaten by the deer.
Answer:
Explanation:
a) Drug X binds to the secondary site or co-agonist site of the receptor since it has no effect on contraction.
b) Drug Y binds to the primary site or agonist site of the receptor since it elicits contraction when aorta is exposed to it.
c) Drugs X and Y have a synergistic effect because the sum of their forces measured independently is larger than when they are tested simultaneously.
Answer:
The magnetic field of Earth is caused by currents of electricity that flow in the molten core. These currents are hundreds of miles wide and flow at thousands of miles per hour as the earth rotates. The powerful magnetic field passes out through the core of the earth, passes through the crust and enters space.
The nucleus of an atom contains the protons and the neutrons.
