are actually giant specialty stores. They feature stores the size of airplane hangars that carry a deep assortment of a particular line with a knowledgeable staff. These stores are prevalent in a wide range of categories, including books, baby gear, toys, electronics, home improvement products, and even pet supplies.

A. Category killer stores
B. killer stores
C. Supermarkets
D. Superstores
E. Supercenters

A. Category killer stores

Explanation:

Category killer stores are those stores which provides a wide range of items to their customers at affordable price. These stores contains toys for childrens , books, magzines, electronic devices , home appliances and pets like dogs and cats etc. These stores can offer items in low prices than small store so small stores cannot compete with it. Chains such as Barnes & Noble, Best Buy, and Staples are considered as category killers.

it enhances antibody production by t cells of the adaptive immune system.

hope i'm right

explanation:

ans.

gregor john mendel is known for study of inheritance in pea plants. he used garden pea plant for his study, having alternative traits for various characters. he performed cross-breeding in pea plants to check how characters are transmitted between parents to offspring, such as cross between pure tall and pure dwarf plant. mendel studied the inheritance patterns in pea plants for various generations.

thus, the correct answer includes options and f).