Worms that had been invaded by bacteria were eaten by a species of bird. Many of these birds died as a result. The most likely explanation for this is that the

Correct Answer: A

Rationale: The correct answer is A because bacteria interfering with normal life functions of the birds is the most likely explanation for the birds dying after eating infected worms. This is a logical explanation as bacterial invasion can lead to harmful effects on the host organism's health. Choice B is incorrect because the disease that killed the birds was not necessarily inherited. Choice C is incorrect as gene alterations in bacterial cells killing the birds is not a common or likely scenario. Choice D is incorrect as birds producing antigens in response to the bacteria would typically be a defense mechanism rather than a cause of death.

Correct Answer: B

Rationale: Certainly! The correct answer is B because applying lotion twice per day is a simple and effective way to moisturize dry skin, which is a common issue in clients with Systemic Lupus Erythematosus (SLE). Moisturizing helps to improve skin hydration and prevent further dryness and irritation. Explanation for why other choices are incorrect: - Choice A: Applying antibiotic cream is not recommended for dry skin in SLE clients as it is not the appropriate treatment. Topical corticosteroid creams are typically used for cutaneous manifestations of SLE. - Choice C: Using petroleum jelly once weekly may not provide sufficient moisturization for dry skin and may not be as effective as applying lotion twice daily. - Choice D: Avoiding moisturizing the skin can worsen dryness and skin irritation, which is not recommended for managing dry skin in SLE clients.

Correct Answer: B

Rationale: The correct answer is B: blood vessels. In the immune system, cells, tissues, and organs play crucial roles in defending the body against pathogens. Blood vessels, while important for transporting immune cells and substances, are not considered a direct component of the immune system itself. They serve as conduits for immune cells to travel throughout the body but do not actively participate in immune responses like cells, tissues, and organs do. Blood vessels are essential for the immune system to function effectively, but they are not considered a direct component of the immune system. Therefore, B is the correct answer.

Correct Answer: B

Rationale: The correct answer is B: A ferritin level test assesses how much iron may be stored in the body. Ferritin is a protein that stores iron, so measuring ferritin levels gives an indication of the body's iron stores. Haemoglobin levels are not directly measured by ferritin tests (A). Ferritin levels do not assess the blood's clotting ability (C) or the number of white blood cells (D). These are unrelated to iron storage.

Correct Answer: C

Rationale: The term petechiae refers to small red or purple spots on the skin caused by broken blood vessels. These spots are typically pinpoint in size and do not raise above the skin surface. The correct answer is C, as it accurately describes the characteristic appearance of petechiae. Option A is incorrect as petechiae are not large or raised. Option B is incorrect as petechiae are not indicative of an infection. Option D is incorrect as petechiae are not related to deep vein thrombosis.