There are four principles at work in evolution—variation, inheritance, selection and time. The theory of evolution by natural selection, first formulated in Darwin's book "On the Origin of Species" in 1859, is the process by which organisms change over time as a result of changes in heritable physical or behavioral traits.
Answer: Observable properties
Explanation:
This is a diagram of a paramecium.
Answer:
Haploid spores
Explanation:
Spores are usually haploid and unicellular and are produced by meiosis