Answer: Stimulus is something that causes a reaction, either positive or negative in the body of an organism. Examples includes, HEAT, COLD, PRESSURE, PAIN
Explanation:
Sand dunes or desert pavement
Answer: Biological polymers are large molecules composed of many similar smaller molecules linked together in a chain-like fashion. The individual smaller molecules are called monomers. When small organic molecules are joined together, they can form giant molecules or polymers. These giant molecules are also called macromolecules. Natural polymers are used to build tissue and other components in living organisms.
Generally speaking, all macromolecules are produced from a small set of about 50 monomers. Different macromolecules vary because of the arrangement of these monomers. By varying the sequence, an incredibly large variety of macromolecules can be produced. While polymers are responsible for the molecular "uniqueness" of an organism, the common monomers are nearly universal.
The variation in the form of macromolecules is largely responsible for molecular diversity. Much of the variation that occurs both within an organism and among organisms can ultimately be traced to differences in macromolecules. Macromolecules can vary from cell to cell in the same organism, as well as from one species to the next.
Explanation:
<span>How are the dark reactions that occur in plants dependent on the light reactions?
a.The chemical energy used in the dark reactions is produced in the light reactions.
Photosynthesis is divided into two parts.
1) Light - dependent reaction
2) Light - independent reaction
Light dependent reaction absorb energy from the sun to produce ATP and NADPH, these energies are used in the light-independent reaction. The ATP provides the energy, while the NADPH provides the electrons required to fix the carbon dioxide into carbohydrates.
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Homeostasis is the ability to maintain constant internal conditions when outside conditions change.
For example, when temperatures in the body fall below 37° C, the nervous system signals the muscular system to
cause the body to shiver. When you shiver, your muscles move. Tiny muscles attached to hairs on the skin contract and pull the hairs up straight, forming goose bumps. This movement generates thermal energy and helps raise body
temperature. Keeping the body’s temperature constant requires that the endocrine system, the nervous system, and the muscular system work together.
