OBJECTIVE LIFE SCIENCE
DIVERSITY AMONG LIFE FORMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Extinctions have occurred twice during Earth’s history, once when the dinosaurs became extinct, and now due to man-made factors.
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Most organisms that have ever lived on Earth are now extinct due to natural factors not man-made factors.
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Either A or B
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None of the above
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Detailed explanation-1: -Species endangerment and extinction have three major anthropogenic causes-overhunting or overharvesting; introduction of nonnative species, including the spread of disease; and habitat degradation or loss.
Detailed explanation-2: -Climate change interacts with threats such as habitat loss and overharvesting to further exacerbate species declines. The decline of species and ecosystems can then accelerate climate change, creating a feedback loop that further exacerbates the situation.
Detailed explanation-3: -Habitat loss due to deforestation, agricultural practices and urbanization is the leading cause of extinction across the world. The other options are also causes but the major cause of extinction is habitat loss.