Extra food is stored in a root's
cuticle
cortex
pith
epidermis

Which image shows labeled organelles that are present only in plant cells?

Identify the type of energy used in each action. the flexing of an arm muscle: a signal transduction process by a neuron: a ball at the top of a hill: 1. electrical energy 2. mechanical energy 3. gravitational potential energy

The law of thermodynamics states that energy can't be created or destroyed. to natural sources of energy on earth are the