A Scientist would consider the color and the width of tree rings give clues about the past climatic conditions of a place.
<u>Explanation:</u>
Trees are quite sensitive to local climatic conditions like rain, temperature, etc. That is why they tend to be useful for weather experts to judge the climate variations. There are many clues seen in the rings of the trees that are helpful in studying the local climate.
Some of the clues are obtained by
- Seeing the patterns and width of the rings
- Seeing the density and composition of the rings
- Smelling the odor of the wood.
- Location
The concentric rings tell about the age of the tree and the weather conditions during its life period. The light - colored rings tells that the tree has grown in the spring and early summer season whereas the dark rings tell that the tree has grown in late summer and during fall.
Moreover, the rings get wider in warm, wet years and get thinner in cold and dry seasons. If the tree has experienced harsh conditions like drought, etc., it will have a hindered growth.
The last one, (leaving child home alone) as the others may not be favorable to the child one is for health, another is for health as well and the last is expected
<h2>Answer:</h2>
Salivary amylase breaks the chemical bonds of starch to form sugar monomers.
<h3>Explanation:</h3>
- Amylase is one of the digestive enzymes which catalyze the breakdown of starch molecules into its monomers.
- A starch molecule is made of the Glucose molecules which are bonded with each other with glycosidic linkages.
- Salivary glands secrete saliva into the mouth cavity.
- Saliva contains amylase for the digestion of starch are known as salivary amylase.
- Steps in the digestion of sugars start from the action of this enzyme.
Excited electrons are those which temporarily occupy a state higher than their ground state
The electron is excited if it is given extra energy, such as when a photon, or packet of light, absorbs it or if it collides with an atom.
Answer:
If body temperature rises, blood vessels in the skin dilate, allowing more blood to flow near the skin's surface. ... Conversely, if your body is too cold, blood vessels in the skin contract, and blood flow to the extremities (arms and legs) slows. Muscles contract and relax rapidly, which generates heat to keep you warm.