Question

what is a consequence of habitat fragmentation?
a. isolated populations of species
b. improved ecosystem health
c. increased biodiversity
d. larger habitats for wildlife
which gas is a major contributor to the greenhouse effect?
a. carbon dioxide
b. argon
c. oxygen
d. nitrogen

Explanation:

First Question (Habitat Fragmentation Consequence)

Habitat fragmentation splits habitats, leading to species populations being isolated (as habitats are broken into smaller, separate parts). Options b, c, d are incorrect: fragmentation harms ecosystem health, reduces biodiversity, and shrinks habitats.

Carbon dioxide ($\text{CO}_2$) is a major greenhouse gas, trapping heat. Argon, oxygen, and nitrogen are not major contributors to the greenhouse effect.

Answer:

a. Isolated populations of species

Second Question (Greenhouse Effect Gas)