OBJECTIVE LIFE SCIENCE
EVOLUTION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
multicellular organisms
|
|
|
eukaryotic organisms
|
|
|
simple, one-celled organisms
|
|
|
heterotrophic organisms
|
Detailed explanation-1: -A human cell has more than 20, 000 genes, fruit flies 13, 000, yeast cells 6, 000. But if we look for the simplest creatures on the planet, we will find a wee bacterium that lives happily in the digestive tracts of cows and goats: Mycoplasma mycoides.
Detailed explanation-2: -The earliest life forms we know of were microscopic organisms (microbes) that left signals of their presence in rocks about 3.7 billion years old. The signals consisted of a type of carbon molecule that is produced by living things.
Detailed explanation-3: -DNA Binds Us All What molecular evidence do we have that all of life is related? All life on Earth stores its genetic material inside the nuclei of its cells. All life on Earth has DNA. All life on Earth has the same set of mutations in its genes.
Detailed explanation-4: -Fossils. Fossils document the existence of now-extinct past species that are related to present-day species.