Which of the following best describes the concept of competitive exclusion, as demonstrated by the Paramecium experiment?

What is the name of structure D? 

What is structure G?

What is structure H?

What is the shape of leaf B called?

Which of the following structures is/are associated with the cephalothorax?  

Which organ in the frog’s circulatory system pumps blood throughout the body?

Which of the following best describes the gravitropic response of a plant root?

When specialized type of cell present on cnidarian tentacles and functions to sting and capture prey? 

What is the name of structure B?