The onset of puberty in girls usually starts at around the age of 10. Girls on the average start their growth spurt between the ages of 10 and 14, about a year before boys. This is the reason girls are often taller than boys of the same age in early adolescence. The growth spurt in girls is also shorter than in boys. Before girls start menstruating they have already reached close to their maximum height. The period of intense growth occurs from 6 to 12 months before menstruation begins. In females, the growth in height during puberty is accompanied by an increase in hip width.
Answer:
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<u><em>A vendor displays a variety of fruits in a market in Amsterdam, Netherlands. Fruits and vegetables are an important source of nutrients. Apples, such as the red and green varieties on the top left of this image, are excellent sources of fiber, which aids in digestion. Oranges and lemons, also in the top row, are high in vitamin C, which helps the body's immune system. Strawberries, in the middle row, also contain vitamin C. Figs, the dark purple fruit in the center row, contain calcium, which contributes to healthy teeth and bones. Grapes have fiber and high levels of sugar, which provides energy. Raspberries have B-vitamins, which contribute to healthy skin and muscles. Nectarines, in the bottom center, are a type of smooth-skinned peach with high levels of potassium, which helps maintain fluid balance in the body.</em></u>
Answer:
A. depend on a concentration gradient
Explanation:
Simple and facilitated diffusion are the two methods of transport of substances down their concentration gradient. In both processes, substances are moved from the region of their higher concentration to that of their lower concentration. Since simple diffusion and facilitated diffusion are passive processes, there is no requirement of energy input to drive them. Both are driven by the concentration gradient of the substances only.
Answer:
There wont be any sound if its a vacuum :)
<h2>Resilience of bone</h2>
Explanation:
The resilience of bone comes from sacrificial bonds in or between collagen molecules
- Three major functions of bones includes
Providing structural support to the body
Providing protection to vital organs
Providing an environment for marrow (where blood cells are produced)
- There are two types of tissues which bones are composed of:
A hard outer layer called cortical bone which is strong, compact,dense and tough
A spongy inner layer called trabecular bone,this network of trabeculae is lighter and less dense than compact bone as a storage area for minerals (such as calcium)
- Bone is also consists of:
Bone forming cells (osteoblasts and osteocytes)
Bone resorbing cells (osteoclasts)
Non mineral matrix of collagen and noncollagenous proteins (osteoid)
Inorganic mineral salts deposited within the matrix
- Bone ends up being a good example of resilience because it is not static like it is perceived to be
