Cnidaria and flatworms exchange gases and remove wastes by way of their:

A) open circulatory systems. B) closed circulatory systems. C) gastrovascular cavities. D) moist skin surfaces. E) respiratory and excretory systems.

The definitive host of a parasite is a. the host for the dormant stage of the parasite. b. where the mature form of the parasite occurs. c. also the vector for the parasite. d. the host for immature stages of the parasite. e.

Is there any evidence that weight gain is genetic? If so, what is it?

You are caring for a client status post lung resection. When assessing your client you find that the bubbling in the water-seal chamber for the chest tubes is more than you expected.

Scott stated the following series of observations. Which represents a theory? I observed three stars in the sky The stars give off light Light travels at 300,000 kilometers per second Stars are balls of hot gases

Why is a virus not a living thing

there are four trophic levels in a food chain: Algae, salmon, bears and humans. if algae produce 6500 kj of energy, calculate the amount of energy that is passed on to each trophic level

Animal cells are permeable to water and urea but NOT to sucrose. The inside of a cell contains 1 M sucrose and 1 M urea and the outside 1 M sucrose and 2 M urea. After the system reaches equilibrium, what changes are observed?

How has human activity impacted the evolution of the peppered moth?

Which feature of sugarcanes suggests that they are stems? The presence of scaly leaves and axillary buds A high quantity of sugar The development of adventitious roots

How was the wildlife affected by hurricane sandy in 2012