The best options that describe hydrosphere in the given options is Water in any location on Earth, including the atmosphere, surface, and underground
Therefore, Hydrosphere regarded as the total amount of water on the planet
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B. A new exoskeleton is formed.
C. Spikelike structures are made in cells.
D. Two parts of a skeleton meet.
At joints , two parts of skelton meet. The region at which two bones joints is called the joints of bones in body. There are different types of joints classified based on the location of these bones.
Joints are regions at which two bones meet. The kind of movement that a particular joint can do depends on its kind and qualities. Joints can be grouped according to their structure and function.
The joints allow us to swivel our neck, bend our knees and elbows, and rotate our shoulders, among other things. A joint is by definition a place where two bones come together to form a structure that enables movement. Ligaments are tissues that hold bones to one another. Tendons serve as the link between muscles and bones.
Where bones are rigid, there are fixed joints, also known as immovable joints. Bones have been joined in these joints in such a way that they are fastened to that component, usually to construct a structure. The movable joints are called cartilaginous joints.
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a.
All living things need nitrogen to make proteins.
b.
Nitrogen is radioactive if it doesn’t go through the cycle.
c.
Organisms cannot use nitrogen directly.
d.
All living things need nitrogen to make DNA.
the answer to your scientifical question is D