An animal’s first defense against pathogens includes skin and mucous membranes. This is part of:
Correct Answer: A. Nonspecific innate defense
MCQ Collection
Animal Form and Function-I MCQs
Practice Animal Form and Function-I questions with answers and explanations.
In an insect, ecdysone rises but juvenile hormone remains high. The expected developmental result is more likely:
Correct Answer: A. Another larval molt rather than adult transformation
An invertebrate larva changes form at a specific stage. The process is controlled by internal chemical signals and environment. This is an example of:
Correct Answer: A. Developmental endocrine regulation
An insect has hemolymph bathing organs directly rather than blood confined to vessels. This is an example of:
Correct Answer: A. Open circulatory system
A fever develops during infection. Fever is considered part of:
Correct Answer: A. Nonspecific immune response
A hormone circulates widely but affects only the ovary. The reason is target-tissue specificity due to:
Correct Answer: A. Receptor presence
A hormone molecule is removed quickly from blood by liver enzymes. The expected effect is:
Correct Answer: A. Shorter duration of hormone action
An earthworm has blood that remains inside vessels. This arrangement is called a:
Correct Answer: A. Closed circulatory system
Inflammation around a wound causes redness, heat, swelling, and pain. The main purpose is to:
Correct Answer: A. Bring defense cells and molecules to damaged tissue
A student studies chemical messengers in annelids. Neurosecretory cells are important because they:
Correct Answer: A. Release regulatory chemicals linked to nervous control
A student describes endocrine systems of poriferans incorrectly. Sponges lack true endocrine glands, but they still show:
Correct Answer: A. Cellular chemical coordination
A student compares hemolymph with vertebrate blood. Hemolymph is commonly found in:
Correct Answer: A. Arthropods