How does today’s climate compare to most of the Earth’s history? What does this indicate about how human activities
can affect climate?
What will be an ideal response?
ANSWER: The Earth is currently in a relatively cool period, relative to the history of climate. While the Earth’s climate has experience repeated temperature shifts, the changes have occurred
slowly relative to the lifetime of individual organisms, which allows adaptations of
populations and evolutionary lineages. Evidence suggests that today’s climate is changing
faster today than in the past; these changes in global climate are due to human activities.
You might also like to view...
Whether during mitosis or meiosis, sister chromatids are held together by proteins referred to as cohesins. Such molecules must _____
A) persist throughout the cell cycle B) be removed before meiosis can begin C) be removed before sister chromatids can separate D) reattach to chromosomes during G1 E) be intact for nuclear envelope re-formation
Mycorrhizal association with plant roots is best described as:
A. detrimental to the roots. B. only a temporary association dependent on water uptake. C. a symbiotic relationship between the plant and certain bacteria. D. a fungus root interrelationship. E. a kind of fungal parasite on plant roots.
A species colonizes an island, goes through a phase of exponential growth, and reaches the carrying capacity of the island. At what stage is the growth rate slowest?
A. initial colonization B. exponential phase C. approaching K D. after reaching K
Why should GM foods be considered on a case-by-case basis instead of making general statements about all GM foods?
What will be an ideal response?