When Studying an Ancient Ecosystem's Organisms,what Was the Advantage of Looking

question 27

Multiple Choice

When studying an ancient ecosystem's organisms,what was the advantage of looking for DNA samples in permafrost?

• A) The freezing temperature preserves the DNA.
• B) Areas with permafrost are older than other parts of the world, allowing scientists to collect samples back 1.5 to 2 million years.
• C) The enzymes that make DNA are still active in the cells.
• D) It is easier to take solid core samples.
• E) Most plants and animals evolved in Siberia.

---

Definitions:

Tubule

A small tube or tubular structure, especially in biological contexts, such as the renal tubules in kidneys.

Hemolymph

The fluid equivalent to blood in most invertebrates, occupying the interior of their bodies.

Malpighian Tubules

Excretory and osmoregulatory system components found in insects and other terrestrial arthropods.

Gut Wall

The lining of the gastrointestinal tract, characterized by layers of tissue that facilitate digestion and absorption of nutrients.