Traits of populations in the forest ecosystem have changed over time. What caused the traits to change

Describe a few rocks that are composed of non-mineral matter.

Which organism does not have a double loop circulatory system A) bird B) fish C) human D) dog

At colder temperatures, the air can hold more water because the air molecules are closer together and thus more capable of supporting water. True False

In a rainforest food chain, caterpillars and butterflies eat orchid plants. Toucans eat the caterpillars and butterflies. Leopards eat the toucans. Which statement describes the energy in this food chain? a.

Which of these features is found only in arteries? -elastic membranes -vasa vasorum -lumen -valves

A little boy blows air into a rubber glove and ties a knot at the end of it. He realizes that he wants the puffed-up glove to be bigger, but he's already tied a knot that he cannot untie.

How often does the body perform cellular respiration?

Which of the following is NOT a characteristic of all living things? a Ability to move b Response to the environment c Ability to Reproduce d Growth and development

What do you observe happening to the wavelength and frequency of the wave under the spectrum as you slide the green arrow from left to right?

Seals and penguins both have streamlined body forms that allow them to move through water efficiently. this similarity in body shape is mostly likely the result of: