Page 124 - Science Course 3 (Book 1)

Mo3-L3b: How Are Organism Related?

Mo3-L3b How Are Organisms Related? Key Concept
How Are Organisms Related?
KEY CONCEPTS:
1. How do pharyngeal pouches provide evidence of How do pharyngeal pouches provide evidence of
relationships among species? relationship among species?

Vocabulary A-Z
Let us learn some vocabulary

Embryology
the science of the development of embryos from
fertilization to birth.

Molecular biology is the study of gene structure and
function.
Let’s Begin

Evidence for Evolution

The science of the development of embryos from
fertilization to birth is called embryology

Discoveries in molecular biology have confirmed and
extended much of the data already collected about
the theory of evolution.
All vertebrate embryos exhibit pharyngeal pouches at Scientists can study
a certain stage of their development. These features, relatedness of
which develop into neck and face parts, suggest organisms by
relatedness. comparing genes
and proteins
Pharyngeal Pouches among living
species.

Human Chicken Turtle Salamander Fish
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