B. Carbohydrates diffuse across the villus epithelium and are then actively transported into blood capillaries.
C. If intact proteins are transported across the villus epithelium, an immune response may be generated.
D. Amino acid transport is linked to chloride transport.
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characterization
syntax
characterization
is the answer.
B) heavy metals such as mercury.
C) nitrogen oxides from automotive exhaust.
D) small particles of smoke and dust in smog.
The correct answer is B) Heavy metals such as mercury.
Explanation:
Heavy metals such as mercury or lead are denser than regular metals, this causes it is common for these metals to be found in the surface of Earth rather than in the air or atmosphere. Indeed, mercury and other similar metals are extracted from the Earth's crust and then used for different purposes. As a result of this, mercury ends up in the surface of Earth or in water sources which causes soil or water pollution. This means mercury is not a common source of air pollution; on the opposite other such as CFCs, nitrogen oxides and smog remain in the air and therefore are sources of air pollution.
O
True
O
False
Prokaryotic cells lack membrane enclosed cell structures.
Prokaryotes are single-celled organisms belonging to the domains Bacteria and Archaea. Prokaryotic cells are much smaller than eukaryotic cells, have no nucleus, and lack organelles.
Examples of prokaryotes are blue-green algae, bacteria and mycoplasma. Among prokaryotes, bacteria are the most common and multiply very fast.
They lack a nuclear membrane. Mitochondria, Golgi bodies, chloroplast, and lysosomes are absent. The genetic material is present on a single chromosome. The histone proteins, the important constituents of eukaryotic chromosomes, are lacking in them.
Learn more about prokaryotic cells:
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Answer:
False
Explanation:
Prokaryotic cells lack a membrane enclosed nucleus and organelles.