A population of snails has an annual per capita birth rate of 0.055 and an annual per capita death rate of 0.015.
Calculate an estimate of the change in population size over one year, for a given starting population of 1,000 individuals. Assume that the population grows exponentially according to the equation dN/dt = r^N.

A) increases by 40 individuals
B) decreases by 15 individuals
C) increases by 400 individuals
D) increases by 55 individuals
E) decreases by 20 individuals

Option A,  increases by 40 individuals

Explanation:

Given,

Annual per capita birth rate

Annual per capita death rate

Net per capita population growth rate

The growth equation of population

     Eq 1

On simplifying we get

Substituting the given values in Eq 1,  we get -

Hence, the population increase by individuals.

Option A is correct

answer:

the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.