We just finished this unit, and The answer is A.
75% species go extinct to be considered a mass extinction
Frogs are amphibians and will become greatly affected by the changing availability of water in certain areas. Infertility will likely become an issue within certain strains of frog families, less eggs will be fertilised in others, and survival rate of developing tadpoles in the rest.
The Serratus anterior in man is homologous to the Serratus ventralis muscle in the cat. The Serratus anterior is a muscle that originates on the surface of the 1st to 8th ribs at the side of the chest and insects along the entire anterior length of the medial border of the scapula. The Serratus anterior acts to pull the scapula forward around the thorax. Serratus ventralis in the cats looks like fingers because it attaches to the ribs, but has nothing to attach to between the ribs.
C) Healthy ecosystems is a value of biodiversity, whereas climate change, pollution, and invasive species are not.
