Answer:
Cell Reproduction
Explanation:
Cell reproduction happens in the Nucleus.
A phylogeny is a hypothesized relationship between groups of creatures that is represented by a cladogram. A scientist investigating phylogenetic systematics uses a cladogram to depict the groups of species being studied, their relationships, and their most common ancestors.
The walls of a villi are only one cell thick, composed of thin epithelial cells, to allow dissolved molecules to pass through quickly.
The epithelial cells of the villi are further covered by even smaller finger-like projections known as microvilli. These microvilli further increase the surface area for absorption.
Close association of the blood capillaries in the villus and the epithelium create a minimal distance for diffusion of food molecules.
Mitochondria in the epithelium provide the ATP for active transport.
The lacteal branch at the center of villi carry away fats after absorption.
B and C are the same but the best answer is C
Answer:
It has increased
Explanation:
The concentration of carbon dioxide in the atmosphere has increased in the last 200 years. The extra carbon dioxide is causing an enhanced greenhouse effect greater than would happen naturally.