The earth’s five major environmental spheres are the biosphere, the atmosphere, the hydrosphere, the geosphere, and the cryosphere, where the biosphere contains living organisms and the cryosphere includes Earth's frozen water.
The biosphere is a complex and dynamic system composed of all living organisms and their interactions with one another, the atmosphere is composed of gases that are essential for life, such as nitrogen (78%), oxygen (21%), and trace gases like carbon dioxide, and the hydrosphere is composed of all the water on Earth, including oceans, lakes, rivers, etc. All these biosphere and atmosphere are interdependent.
Hence, the earth’s five major environmental spheres are the biosphere, the atmosphere, the hydrosphere, the geosphere, and the cryosphere, where the biosphere contains living organisms and the cryosphere includes Earth's frozen water.
Learn more about the environmental spheres here.
#SPJ6
Answer:
Environmental spheres refer to all the physical entities present in the environment. It majorly includes four spheres namely atmosphere, biosphere, hydrosphere and geosphere. However, some include cryosphere as a distinct portion.
1. Atmosphere: It refers to the gaseous blanket that surrounds the earth.
2. Biosphere: It includes all the living organisms including the environment they live in.
3. Hydrosphere: It represents all the water present on the earth. It may be in the form of rivers, lakes, glaciers, oceans, water vapors et cetera.
4. Geosphere: It refers to the solid portion of the earth. It includes crust, mantle, and core of the earth. It provides all the rocks and minerals required by the living organisms.
5. Cryosphere: It refers to the ice sheets (solid form of water) of the earth.
Answer:
The correct answer would be ribs (rib cage), skull and spine.
Explanation:
Our skeletal system provides support to the body, shapes and protects vital organs. There are three major and most important bones that protect our vital organs. These three bones are - ribs or rib cage, skull, and spine.
The rib cage or ribs protect the most important organs of the body - heart, and lungs. Ribs are attached to the vertebral column and sternum in the thorax.
Skull is also protecting one of the most important organs which are the brain. The brain is a very vital and sensitive organ. Skull is consists of twenty-two bones.
Spine has 33 vertebrae bones that interlock to form the spinal column. It protects the spinal cord, nerve roots, and other organs.
Thus, the correct answer would be ribs, skull, and spine.
B. Amino acids contain oxygen.
C. Amino acids contain carbon.
D. Amino acids contain nitrogen.
Answer:
Starch is a polysaccharide which comes under carbohydrates.The incorrect option here is option D which says the basic constituent of amino acid, that contains nitrogen as it is not found in starch.
Explanation:
What is the basic component of starch?
Starch is a carbohydrate. Carbohydrates are of different types like monosaccharides, disaccharides, oligosaccharides, and polysaccharides.A monosaccharide is the basic simplest form of carbohydrate and a polysaccharide is the complex one.
The basic formula of any carbohydrate contains, Carbon, hydrogen and Oxygen. The polysaccharide, as the name suggests, it has many glucose molecules linked together as a chain.
Hence, starch is a polysaccharide found in plants. It is stored in the form of a storage molecule in plants. It does not contain nitrogen as its structural component.
learn more about the starch here
#SPJ5
Answer:
D.
Explanation:
Nitrogen is the major atom that is present in amino acids that are not present in carbohydrates.
chromatid
zygote
gamete
tetrad
The correct answer is option D, tetrad
Tetrad consist of two homologous chromosomes resulting into a foursome of DNA formed during meiosis. The 46 chromosomes in humans replicate during the process of meiosis. The original chromosomes and the replicated chromosome get attached to form conjoined twins, known as sister chromatids. During the prophase of meiosis, a four - part structure is formed which consists of two homologous chromosomes with two sister chromatids in each chromosomes.
The protein found in hair and nails is known as keratin (option b).
The protein known as keratin is a widely abundant protein present in different tissue including for example hair, nails, and the epidermis, which is the most superficial layer of the skin in the human body that protect us against biological and physical threats.
Therefore, with this data, we can see that the protein known as keratin is abundant in the human body and it is present in different tissues including hair and also nails.
Learn more about keratin here:
#SPJ6