Rock Mineral
Explanation:
Rock minerals are naturally occurring inorganic solids with a definite chemical composition and an orderly arrangement of atoms.
Minerals forms as a result of combination of different elements.
The minerals makes up rocks. A rock is an aggregate of minerals.
- They are naturally occurring: minerals are not formed in the laboratory through a synthetic process.
- The are inorganic: not formed by living organisms.
- Solids: minerals are in the solid phase of matter
- definite chemical composition: they are compounds and not mixtures.
- Orderly arrangement of atoms: they are crystalline
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Answer:
Option (4)
Explanation:
Carbon forms the basin element for the existence of life. It is present in the atmosphere in the form of CO₂, which is one of the major green house gas. It plays an important role in the carbon cycle.
The increase in the concentration of carbon in the atmosphere can lead to the global rise in the temperature. It can lead to global warming. The amount of carbon in the atmosphere has been rising continuously, right after the industrial revolution.
The carbon is mainly emitted from the heavy industries and factories, vehicles, burning up of fossil fuels. It also increased due to the increasing absorption of solar radiation.
This emission of carbon if not controlled by the humans, then the concentration of carbon in the atmosphere will abruptly increase after some decades.
Thus, the correct answer is option (4).
Answer: Arterial thromboembolism
Explanation:
Arterial embolism can be defined as the sudden hinderance of the blood flow to an organ or body part due to the embolus which to the wall of the artery.
This clot can lead to more serious in the future. The arterial embolism occurs due to the consumption of food rich in fat and cholesterol.
It is the main cause of the myocardial infraction and vasoconstriction.
tan coloring to blend in with the surroundings
Explanation:
The tan coloring helps ground squirrels adapt properly to African savannas.
African Savannah is a large expanse of grassland with very short trees. The bulk of Savannah is predominantly dominated by grass.
- Ground squirrels have a fascinating tan coloring of their hair like rodents in this biome.
- The color is the color of the earth.
- Through this it can easily blend with the ground and camouflage to escape their preys.
- Sharp claws are useless because it is a grassland.
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