Answer: The answer to both questions is the same, presuming no extinctions during the first 1,500 years of world history.
We don't even know how many "kinds" or "species" are alive today!
In the 16th century, the Europeans began to discover the colored peoples of the world.
They assumed that Noah and his family were white, so for the colored peoples to have survived the Genesis Flood, it must have been local. The chemical elements of matter consist of very stable atoms, such as silicon, carbon, iron, uranium, etc.
Seventeenth century observers noted that layers of similar types of rock could be traced continuously from country to country across Europe.
These rocks were correctly perceived to consist of sediments deposited from flood waters. Hugh Ross, who has a genuine Ph D in astronomy, published his book The Finger of God in 1989.
However, certain elements also have an unstable or radioactive form that, under natural conditions, decays or breaks down into "daughter" products at a very uniform rate.
The carbon-14 method is slightly different from other dating methods. Carbon-14 is the unstable form produced by cosmic ray bombardment of nitrogen in the earth's upper atmosphere.
Here there seems little doubt that the Flood had to be truly global and not just "global" in the minds of one minor tribe of people: The history of an idea is always revealing.
One of the primary evidences claimed for an old universe – and, by implication, an Earth billions of years old – is that light from the most distant stars can be observed on Earth today.