Mystery Questions
What are homologous structures?
Body parts of organisms that are similar in structure and position, but different in function.
What is a vestigial structure?
Body parts that have lost their original function through evolution.
Which organisms are closer relatives: a dolphin and shark or a human and a dolphin?
What is embryology?
The science of the development of embryos from fertilization to birth.
Naturally preserved remains, imprints or traces of organisms that lived long ago are called what?
What is an Analogous structure?
Body parts of organisms that perform a similar function but differ in structure.
How are vestigial structures evidence of descent from ancestral species?
A structure with no function in a living species suggests that it descended from an ancestor that used the structure.
The sugar included in a nucleotide building block of DNA.
Deoxyribose
What is an embryo?
An unborn or unhatched offspring in the process of development.
The fossil record is enormous, but is still_________.
The wings of a butterfly and the wings of an eagle are an example of:
What purpose did our appendix use to serve?
Order the terms from smallest to largest: Cell, base, gene, DNA, nucleus, chromosome
Base, DNA, gene chromosome, nucleus, cell
Generally, the older the fossil, the shallower or deeper it is in Earth
The leg of a cat and the wing of a bird are an example of:
What are examples of vestigial structures in humans?
All humans have gills as embryos. What do these gills develop into before we are born?
What provides evidence that species have changed over time?
Describes how organisms with favorable traits are more likely to survive reproduce over time.
Natural Selection
What is one vestigial structure in a whale?
thumb
Occurs randomly in genes and results in variation among a species
Mutations
What is made up of all the fossils ever discovered on Earth?