Answer:

a. The odd term in this set is "pericardium." The remaining terms belong to the category of different types of tissues.

b. The odd term in this set is "thymine." The remaining terms belong to the category of nitrogenous bases found in DNA and RNA.

c. The odd term in this set is "Pea." The remaining terms belong to the category of different types of plants.

d. The odd term in this set is "Uterus." The remaining terms belong to the category of different parts of the urinary system.

e. The odd term in this set is "glucagon." The remaining terms belong to the category of different types of proteins or pigments found in the body.

★ Let me explain briefly:

a. In this set, "pericardium" is the odd term because it is a protective membrane around the heart. The other terms, "lumen," "muscular tissue," and "connective tissue," belong to the category of different types of tissues in the body.

b. The odd term in this set is "thymine" because it is a nitrogenous base found in DNA, while the other terms, "uracil," "adenine," and "guanine," are also nitrogenous bases but are found in RNA and DNA.

c. The odd term in this set is "Pea" because it is a specific type of plant, while the other terms, "Coleus," "Geranium," and "Croton," are also different types of plants.

d. The odd term in this set is "Uterus" because it is a reproductive organ, while the other terms, "Ureter," "Urethra," and "Urinary bladder," are parts of the urinary system.

e. The odd term in this set is "glucagon" because it is a hormone involved in regulating blood sugar levels, while the other terms, "haemoglobin," "iodopsin," and "rhodopsin," are proteins or pigments found in the body.