LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

EVOLUTION

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A team of scientists located the fossilized remains of a canine’s leg and jaw. What information must be gathered before the scientists can place the fossils in the ancestral timeline of the modern dog?

A	Compare the homologous structures of other fossils found in the same area.
B	Locate the remainder of the skeleton for a complete anatomical comparison.
C	Determine the relative age of the fossils.
D	Compare the fossils with other species of organisms.

Explanation:

Detailed explanation-1: -What information must be gathered before the scientists can place the fossils in the ancestral timeline of the modern dog? Compare the homologous structures of other fossils found in the same area.

Detailed explanation-2: -Fossils, along with the comparative anatomy of present-day organisms, constitute the morphological, or anatomical, record. By comparing the anatomies of both modern and extinct species, paleontologists can infer the lineages of those species.

Detailed explanation-3: -DNA and the genetic code reflect the shared ancestry of life. DNA comparisons can show how related species are.

Detailed explanation-4: -Similar DNA sequences are the strongest evidence for evolution from a common ancestor.

Detailed explanation-5: -Homologous structures are structures that are similar in related organisms because they were inherited from a common ancestor. These structures may or may not have the same function in the descendants.

There is 1 question to complete.