AP BIOLOGY

ECOLOGY

HUMANS AND THE BIOSPHERE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Two farmers decide to plant fewer types of corn in their fields. How will changing the biodiversity of the corn crop affect the fields?
A
Predator species that eat corn will lose their food source.
B
Planting fewer types of corn will add more nutrients to the soil.
C
The introduction of invasive plant pathogens will increase the crop yield.
D
Planting fewer types of corn will make the corn more vulnerable to plant pathogens.
Explanation: 

Detailed explanation-1: -How will changing the biodiversity of the corn crop affect the fields? Predator species that eat corn will lose their food source. Planting fewer types of corn will add more nutrients to the soil.

Detailed explanation-2: -How will changing the biodiversity of the corn crop affect the fields? A Predator species that eat corn will lose their food source. B Planting fewer types of corn will add more nutrients to the soil. C The introduction of invasive plant pathogens will increase the crop yield.

Detailed explanation-3: -The main direct cause of biodiversity loss is land use change (primarily for large-scale food production) which drives an estimated 30% of biodiversity decline globally. Second is overexploitation (overfishing, overhunting and overharvesting) for things like food, medicines and timber which drives around 20%.

Detailed explanation-4: -"This summary provides unequivocal evidence that declining diversity of plants and algae in the world’s ecosystems will decrease the biomass of plants in natural ecosystems, and degrade their ability to use biologically essential nutrients from soil and water, ” Cardinale says.

Detailed explanation-5: -Wetlands destruction has increased flood and drought damage, nutrient runoff and water pollution, and shoreline erosion, and triggered a decline in wildlife populations.

There is 1 question to complete.