Plants do not have structures that aid in their survival.

When a habit has limited resources, there is a struggle between organisms within the habit to survive. What can this be described as?

Platypus have a "sixth-sense" that allows them to hunt underwater: electroreception. To find meals in the mud, it uses its bill to detect movements and subtle electric fields produced by its prey. Receptors on the bill detect changes in pressure and motion. Two types of receptors track the electrical signals produced by small prey when they contract their muscles. The platypus moves its head side-to-side to determine the direction and distance of its next meal by collecting and processing this sensory information. The platypus has about 40,000 of these special receptors.

Based on the passage, which of the following sentences best describes how the platypus processes an electrical signal?

Andy says that animals have structures that help them survive, but the skin is not one of those structures. Which of the following arguments DISPROVES Andy’s statement?

Which structure(s) on a rattlesnake help it to survive?

Some plants have fibrous roots that branch in many different directions. These roots help the plants to absorb water quickly, while also holding them in the ground. In which of the following scenarios would fibrous roots serve as a structure for a plant’s survival?

Which of the following is NOT an example of a feature an animal may use to receive information about its surroundings?

The brain is where all information received from the senses is processed.

The brain is where all information received from the senses is processed.

Platypus have a "sixth-sense" that allows them to hunt underwater: electroreception. To find meals in the mud, it uses its bill to detect movements and subtle electric fields produced by its prey. Receptors on the bill detect changes in pressure and motion. Two types of receptors track the electrical signals produced by small prey when they contract their muscles. The platypus moves its head side-to-side to determine the direction and distance of its next meal by collecting and processing this sensory information. The platypus has about 40,000 of these special receptors.

Based on the passage, which of the following sentences best describes how the platypus processes an electrical signal?