Some scientists suggest that organic molecules were introduced into Earth's atmosphere when ________ crashed into Earth

Fill in the blank(s) with correct word


comets

Biology & Microbiology

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What is the Aristotle's lantern? a. A sensory organ for light

b. A visual sensor. c. A chewing structure. d. A specialized tube for locomotion.

Biology & Microbiology

To maintain order within their cells and organs, all living things must

a. extract energy from sunlight. b. constantly change. c. carry on metabolism. d. reproduce. e. be able to move.

Biology & Microbiology

Fovea is where you get the highest amount of ____ and ____ in the retina

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

A researcher returns from the Amazon River with 10 individuals of a species of fish and establishes a small breeding colony in her laboratory

She maintains the colony for several years (many fish generations), always maintaining the number of adult fish between 10 and 30. She notices that as generations of fish are bred, the reproductive rate decreases. What is the most likely reason for this? A) inbreeding depression B) increased genetic variability C) random mutations D) heterozygote advantage

Biology & Microbiology