Answer: phenotype. An organism's physical appearance, or visible traits. genotype. An organism's genetic makeup, or allele combinations.
Marie and Pierre Curie successfully isolate radioactive radium salts from the mineral pitchblende in their laboratory
Answer: Intertidal zones are regions which lie above the water level which receives low tides. Estuaries are the closed bodies of coastal waters which contain brackish water.
Explanation:
The ways through which the intertidal zones and estuaries can be protected are as follows:
1. The chemical discharge from factories and sewage discharge must be restricted or prohibited in these areas so that the water and air quality remains good necessary for the survival of living beings.
2. Prohibiting the waterways to prevent the discharge of oils which can contaminate water of estuaries and soil of intertidal zones.
3. The trash of polythene bags, plastic materials, vegetable matter discharged from the city must be cleaned up to retain the quality of soil and water.
Juglar Vein
This vein drains blood from head to heart.
Sub-clavian Vein
This vein drain blood from shoulder to heart.
Answer: Geologic time is divided into units. Major changes in the earth's surface or climate and the extinction of species help to divide the time scale into smaller units.
Explanation: Rocks grouped within each unit contain a similar fossil record.
