You are presented with the question "What is one thing studied in immunology?" and the following answer choices: - illness - antigens - humanism - health - philosophy - resistance - symbology - fever Now knowing that antigens are molecules that the immune system recognizes as foreign to the body and immunology is the study of the immune system, choose the best answer.
antigens
(Question)
You are presented with the question "Chondrocytes contain which type of protein?" and the following answer choices: - Actin - Keratin - white - allow growth - Collagen - ligt - positive - Hemoglobin Now knowing that cartilage is a tough tissue that contains a protein called collagen and cartilage cells are called chondrocytes in mature cartilage, choose the best answer.
(Answer)
Collagen
Ques: You are presented with the question "what do viruses contain?" and the following answer choices: - Mass - DNA - SNPs - RNA - acid - gene - ovum - host Now knowing that viruses contain DNA but not much else and all viruses consist of RNA or DNA and a protein coat, choose the best answer.
Ans: RNA
(Q).
You are presented with the question "marine and benthic species use pheromones to what?" and the following answer choices: - seed dispersal - produce offspring - life-sustaining - float underwater - defense mechanism - arm each other - communicate with each other - live in marine bays Now knowing that echinoderms use pheromones to communicate with each other and all echinoderms are marine and benthic, choose the best answer.
(A).
communicate with each other
Ques:You are presented with the question "What does a porcupine do with its spines when it's threatened?" and the following answer choices: - killing insects - Shoot them - kill them - protect them - Extend them - Shed them - Retract them - behave Now knowing that threatening behavior by predators causes a porcupine to extend its quills and puffers are smooth skinned while Porcupines have the characteristic spines or quills, choose the best answer.

Ans:Extend them
You are presented with the question "what makes sand formations?" and the following answer choices: - potash - wind - fibers - fish - Rain - sea - soils - coral Now knowing that the surface of a beach is formed by mechanical weathering and beaches and Sand Dunes Dunes are accumulations of sand blown from the beach by the wind, choose the best answer.
wind