Aclient is suffering from scleroderma. which symptom might develop in the client on exposure to cold? raynaud’s phenomenon joint swelling calcinosis esophageal motility disorder kaposi’s sarcoma

Raynaud's phenomenon.
Scleroderma is a group of autoimmune diseases that may affect different parts of the body with special intensity in the skin. Some of the affected structures may be blood vessels. Because of this, when exposed to cold, vasoconstriction occurs and the Raynaud's phenomenon is manifested in the extremities of the body.

d. While there are some competing theories on the origin of the nucleus, neither theory discussed in the text really explains the origin of the nucleus.

Explanation:

The nucleus is found in eukaryotes in which the genetic material is enclosed. Some scientists say that the nucleus is evolved from mycoplasma which is a prokaryote who was engulfed by an amoeboid cell.

Some say that the nucleus is originated from archaea which were phagocytosed by bacteria. So there are some competing theories that tell about the origin of the nucleus but do not have proper evidence to explain the origin of the nucleus. So the correct answer is d.