Answer:
The bird's respiratory system consists of paired lungs, which contain static structures with surfaces for gas exchange, and connected air sacs, which expand and contract causing air to move through the static lungs
Explanation:
Beavers are descendants of land-dwelling rodents similar to rats. The beavers however have adapted their body shape to live in water bodies like ponds and lakes. This can be hypothesised by saying that the early rodents or the ancestors of beavers were forced to find food in the waters. They lacked the flat tail and the webbed feet. With time the need to increase their ability to catch fishes and floating insects, the rodents with flatter tail and a bigger flat webbed feet gradually evolved. The rodents with flatter tails and webbed feet became adjusted to the life on water and became the modern day beavers.
The answers are;
homeostasis
metabolism
heredity
movement
cells
sensitivity
reproduction
The other characteristics of living organisms include that are not among the choices are growth, adaptation, and interactions. These are characteristics shared by all living organisms whether large or small, complex or simple. They are born by a bacteria(simplest living organism) to humans (complex organisms).
Demonstrate how to use the balance that students will be using to measure the mass of the cube. Record the mass of the cube in grams (g). Show students how to calculate density<span> by dividing the mass by the volume. Point out that the answer will be in grams per cubic centimeter (g/cm</span>3<span>).</span>
Everyone needs water to survive. Just like we need oxygen we need water.
