Question

3 multiple choice 20 points
how has understanding genetics influenced understanding biology as a whole?
it tells us the age of rocks.
it proves the earth is flat.
it helps explain how traits are inherited.
it shows how ecosystems form.
4 multiple choice 20 points
earths history is often studied by examining:
the speed of light.
ocean currents.
weather patterns.
fossils and rock layers.

Explanation:

• Question 3: Genetics is the study of genes and heredity. It focuses on how traits are passed from parents to offspring. The option "It helps explain how traits are inherited" is correct as it directly relates to the core concept of genetics. The other options are incorrect: determining rock age is related to geology (not genetics), the Earth is spherical (not flat), and ecosystem formation is a topic in ecology (not directly genetics - though genetics can play a role in species within ecosystems, the direct influence here is about inheritance).
• Question 4: Fossils are the preserved remains or traces of ancient organisms. Rock layers (strata) can be dated and studied to understand the sequence of events in Earth's history. By examining fossils in different rock layers, scientists can learn about past life forms, environmental changes, and the geological timeline. The speed of light is a physics concept (used in some dating methods but not the main way Earth's history is studied here), ocean currents and weather patterns are more related to short - term or current environmental and meteorological studies rather than long - term Earth history.

Answer:

1. It helps explain how traits are inherited.
2. Fossils and rock layers.