(Q).
You are presented with the question "What do genes do to form a chain?" and the following answer choices: - interact - spread flower seeds - Break apart - Link together - reproduce - Duplicate - Break down - It expands Now knowing that genes that are located on the same chromosome are called linked genes and thousands of genes are linked together in a chain to form chromosomes, choose the best answer.
(A).
Link together

(Q).
You are presented with the question "Mold spores have what impact on breathing?" and the following answer choices: - neutral - ambiguous - symptoms - motility - positive - dangerous - negative - uncontrolled Now knowing that amold spore has a negative impact on the respiratory system and insects also have both a heart and a respiratory, or breathing, system, choose the best answer.
(A).
negative

(Q).
You are presented with the question "What is something cells cannot survive without?" and the following answer choices: - gas - Air - O2 - CO2 - Ca - O3 - Fe - He Now knowing that cells cannot survive without oxygen and and oxygen, O2, is the molecule to do it, choose the best answer.
(A).
O2