Which group makes up the greatest amount of marine life mammals, fish, plankton, shellfish

The roots of a plant grow towards a source of ground water

What couldn't kidneys work without

Where does alcohol fermentation occur?

What is the purpose of genetic modification?

Which of the following species should contain genes that are responsible for nuclear proteins and are therefore evolutionarily related (plants and animals) ? a. rabbitb. butterflyc. bacteriumd. flamingoe. apple tree

A tree is planted in a meadow. after 20 years it has grown into a big tree, weighing 250kg more than it was planted. where does the extra 250kg come from? explain your answer as fully and scientifically as you can.

Teeth begin to break down food by mechanical digestion. Which statement best describes this physical change?

The type of metamorphism that takes place in response to large-scale mountain-building process is called:

Differential survival and reproduction is best described by which term? a. natural selection b. creationism c. inheritance of acquired characteristics d. none of these

What organelle produces atp during cell respiration