Students made a model ecosystem on their school lawn. They dropped equal numbers of different colored toothpicks in the green grass to represent worms. They pretended to be birds and were given one minute to pick up as many toothpicks as they could. They picked up more red and blue tooth picks than green. What concept does this model represent? a. That all toothpicks can easily be seen in the grass.
b. That animals like to eat things that are red and blue.
c. That camouflage is an adaptation that helps animals escape predators.
d. This activity is not like nature.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

hi my name is ashlynn and im 15

these macromolecules could either be amino acids, proteins or nucleic acids. they are responsible for the chemical changes and reactions that affects largely the cell and its composition. take for instance the cytoplasm of the cell where these organelles are settled. these simple organelles are composed of macromolecules which ignites and catalyses different functions that enables cells, in macro-perspective in motion and metabolism. in intestines for example, metabolism happens and breaking down parts of a food to simpler compounds that are used and these nutrients delivered throughout the body and again broken down by into smaller components.