which organism is an omnivore according to the food web?

• fox

• birds

• owl

• grasshopper

• mice

what is the relationship between photosynthesis and respiration?

• they both use the same reactants

• they both produce the same products

• they are opposite reactions

• they both require water

Which organ system can be found inside some organisms and on the outside of other organisms?

• muscular

• skeletal

• nervous

• circulatory

With the exception of deep sea vents, what is the source of energy for every ecosystem on Earth?

• sun

• lava

• air

• water

The organisms in the picture above serve what role in an ecosystem?

• producer

• consumer

• decomposer

What part of a cell allows necessary materials into the cell and gets rid of wastes?

• nucleus

• cell membrane

• mitochondria

• vacuoles

What explanation can be given for the variation in the beaks of birds?

• each beak is adapted to serve a special function

• each beak allows the bird to outcompete other birds in a specific niche

• each beak is suited to a certain type of food

• all of the above

If brown hair is dominant to blonde hair, what percentage of the offspring in the example above have brown hair?

• 25%

• 50%

• 75%

• 100%

is it alive or not?

• alive

• not

What type of macromolecule is glucose?

• lipid

• protein

• carbohydrate

• nucleotide