B. bone.
C. blood.
D. fat tissue.
Answer:
The correct answer is option A. "skin".
Explanation:
Hair and nails are derived from cells of the skin. The cells of the skin have keratin, a protein that creates a protective barrier against the environmental factors that could affect them. The hair and nails are modifications of skin cells, that have keratin but with additional features. The hair is made of 95% keratin and is formed of three components: medulla, cuticle and cortex. The nail cells are made from keratin as well, forming a horn-like structure that is replaced by skin cells constantly.
Blood is essential for delivering oxygen and nutrients to cells, eliminating waste products, aiding in our immune response, and carrying hormones. The heart is responsible for pushing blood through the body using muscular contractions.
Blood is a crucial part of our body's operating system. It has several key roles, including delivering oxygen and nutrients to cells, removing waste products, aiding in our immune response, and facilitating hormone transportation. The organ that pushes blood through your body is the heart. The heart's muscular walls contract, creating pressure and pushing blood through a network of veins and arteries in a process known as circulation.
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b. cells, tissues, organs and organ systems.
c. organ systems, tissues, cells and organs.
d. cells, organs, tissues and organ systems
In biological hierarchy, the levels of organization of the human body from simplest to most complex are: cells (the basic building block), tissues (groups of similar cells), organs (made up of different tissues), and organ systems (multiple organs working together). So, the correct answer to the student's question is (b).
In the biological hierarchy, the levels of organization in the human body typically increase in complexity. The simplest level is the cell, which is the basic building block of life. Groups of similar cells form a tissue, providing a specific function. Different tissues combine to form an organ, such as the heart or brain. Then, multiple organs that work together make up an organ system, like the digestive or nervous system. Therefore, the correct answer in order from simplest to most complex is (b) cells, tissues, organs, and organ systems.
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b. octopi
c. clams
d. squids
Gastropods are a class of mollusks that includes snails. They are characterized by their single, coiled shell (in most species), a muscular foot used for locomotion, and a distinct head with sensory organs and eyes.
The correct option is A.
Snails are the most common and familiar example of gastropods, known for their spiral-shaped shells and the ability to retract their bodies into the shell for protection.
Octopi, clams, and squids do not belong to the gastropod class. Octopi are part of the class Cephalopoda, which includes highly intelligent and agile marine animals with tentacles. Clams are b.i.v..a.lve mo.llusks, characterized by having two hi.n.ged shells and a soft body inside. Squids are also part of the class Cephalopoda and have elongated bodies, multiple arms, and tentacles.
Hence , A is the correct option
To learn more about Gastropods, here
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