Five types of evidence for evolution are discussed in this section: ancient organism remains, fossil layers, similarities among organisms alive today, similarities in DNA, and similarities of embryos.

2. Directions: Write T if the
statement is true and F
if it tells otherwise.

3. ___1. In relative dating, the
age of fossils is determined
by looking into the rock
layers where it is located.
T

4. ___2. Fossils formed by
compression have little to
no organic materials left.
F

5. ___3. The least number of amino
acid differences in the genetic
sequences among organisms
indicates that they are closely
related.
T

6. ___4. Carbon-14 radioactive
isotope is used to date fossils
more than 100,000 years old.
F

7. ___5. The bat wing and
whale flipper are
analogous structures.
F

9. 1. Compare the stages of embryonic
development of the following organisms.
2. Explain how embryonic development
provides clues for evolution.

11. Study and compare the stages of
embryonic development of the
following vertebrates. Write your
answer in your notebook/on a separate
sheet of paper.

12. In what stages of
development of the
organisms above show
similarities?

13. Identify the
structure, how and
where are they
similar?

14. In stage 3, identify the
structures that made the
organisms unique from
each other?

15. Can embryonic
development be an
evidence that evolution
took place? Explain.

17. What is a prof or a documentation of the
existence of now-extinct past species that
are related to present-day species?
A. Evidence of life
B. Evidence of evolution
C. Evidence of relative dating
D. Evidence of mutation

18. What are the types of evidence that scientists have
gathered in support of evolution?
A. fossils, comparative anatomy, embryology, and
biochemical similarities
B. fossils, relative anatomy, embryology, and
biochemical similarities
C. fossils, embryology, and relative anatomy
D. fossils, comparative anatomy, and biochemical
similarities

19. Which of the following statements best
explains why bat wing and butterfly wing are
analogous structures? They have _______
A. similar underlying structures
B. different underlying structures
C. No underlying structures
D. different functions

20. Evidence of evolution is provided by genetic
information? The more similar the ___
A. amino acid sequences, the more closely related the
species are.
B. amino acid sequences, the more distantly related
the species are.
C. enzymes between organisms, the more distantly
related the species are.
D. enzymes between organisms, the more similar they
are.

21. Based on their genetic information, which of
the following best explains the evolutionary
relationship of humans and chimpanzees?
A. Humans and chimpanzees have around a 1.2% difference in
their genetic makeup. Hence, they are distantly related.
B. Humans and chimpanzees have around a 1.2% difference in
their genetic makeup. Hence, they are closely related.
C. The genetic makeup difference in humans and
chimpanzees is 30%
D. Humans and chimpanzees have a genetic makeup
difference of around 1.2%