How can we understand what happened millions of years ago when there was no one at that time?

How can you know what happened millions of years ago if no one was there to see it? Evidence and observation are the building blocks of all scientific inquiry; evolutionary science is no different. The theory of evolution puts these clues together into a cohesive explanation of the diversity of living things.

What are the differences of biological and cultural revolution?

Both are based on variation, heredity and selection, but how these appear and work differ. Biological evolution is unconscious, opportunistic and not goal-directed, while cultural evolution is conscious, at best planned, and can have a goal. Selection operates in two ways, natural selection and sexual selection.

Why don’t we have a complete fossil record of all life that’s ever lived?

Why don’t we have a complete fossil record of all life that’s ever lived? Fossil formation requires a rare mix of physical and biological conditions. Fossils must be exposed at Earth’s surface to have a chance of being found. Fossils can be destroyed when rocks erode, melt, or change composition.

How can you differentiate the biological evolution and cultural evolution?

What Is The Difference Between Biological And Cultural Evolution?

Biological evolution	Cultural evolution
Only from parents	From one person to several unrelated people
Transmission of traits across generations
To the succeeding generation	Could be within/between generations, separated between space and time
Pace of occurrence

Which is true about cultural evolution and biological evolution?

The fact that cultural evolution can occur faster than biological evolution has altered the effect of natural selection on humans. People are pre-adapted by their genes to acquire particular cultures. 4. All human cultures evolve over time.

Did humans evolve from monkeys?

Firstly, humans did not evolve from monkeys. Instead, monkeys and humans share a common ancestor from which both evolved around 25 million years ago. This evolutionary relationship is supported both by the fossil record and DNA analysis. A 2007 study showed that humans and rhesus monkeys share about 93\% of their DNA.

Is evolution linear or branching process?

Evolution is not linear “The idea of sharing a common ancestor leads to the second major misunderstanding inherent in the question,” says Dr Willis, “that evolution is a linear process where one species evolves into another.” Evolution is really a branching process where one species can give rise to two or more species.

Why can’t two species breed with two different directions?

Different species may have different genes that are active in development; therefore, it may not be possible to develop a viable offspring with two different sets of directions. Thus, even though hybridization may take place, the two species still remain separate.

Why do some species look similar but not different?

Some species may look very similar externally, but can be dissimilar enough in their genetic makeup that they cannot produce viable offspring and are, therefore, different species. Mutations can occur in any cell of the body, but if a change does not occur in a sperm or egg cell, it cannot be passed on to the organism’s offspring.