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A human somatic cell contains chromosomes, which represents the state

A.

46; haploid

B.

23; diploid

C.

46; diploid

D.

23; haploid

Answer and Explanation

The Correct Answer is C

A. 46; haploid: A cell with 46 chromosomes is diploid, not haploid.
B. 23; diploid: A diploid cell has two sets of chromosomes—23 from each parent, totaling 46.
C. 46; diploid: Human somatic (body) cells contain 46 chromosomes (2n)—this is the diploid state.
D. 23; haploid: 23 chromosomes is the haploid number, found in gametes (sperm and eggs), not somatic cells.
 


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Related Questions

Correct Answer is D

Explanation

A. Brain: The brain is the control center, not the effector.
B. Shivering: Shivering is a response, not an anatomical structure. The effector must be a structure that performs an action.
C. Thermoreceptors: These are the sensory receptors (detectors), not effectors.
D. Skeletal muscles: Skeletal muscles are the effectors that contract to produce shivering, generating heat in response to cold.

Correct Answer is B

Explanation

A. it requires heat to evaporate: Water has a high heat of vaporization, meaning it requires a lot of energy to evaporate.
B. it undergoes rapid temperature changes: Water has a high specific heat, meaning it resists rapid temperature changes, which helps maintain homeostasis.
C. it is an excellent solvent: Water is called the "universal solvent" due to its polarity, which dissolves many substances.
D. it is a great mixing medium, forming solutions, suspensions and colloids: Water forms various types of mixtures, including solutions, suspensions, and colloids.

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