Question

1. Living beings that can be seen only under a microscope
2. A group of similar cells
3. Bean shaped excretory organs
4. Cordlike things that attach muscles to bones
5. Quick responses controlled by the spinal cord​

Answer 1

Answer:

a group of similar cells

Answer 2

Explanation:

1 Answer - Size. Bacteria are the smallest micro-organisms, ranging from between 0.0001 and 0.001mm in size. Phytoplankton and protozoa range from about 0.001mm to about 0.25mm. The largest phytoplankton and protozoa can be seen with the naked eye, but most can only been seen under a microscope.

2 Answer - A tissue is a group of similar cells performing similar functions. Each tissue has a specific function.

3 Answer - Kidneys

The Kidneys. The kidneys are a pair of bean-shaped organs just above the waist. They are important organs with many functions in the body, including producing hormones, absorbing minerals, and filtering blood and producing urine.

4 Answer - A tendon is a fibrous connective tissue which attaches muscle to bone. Tendons may also attach muscles to structures such as the eyeball. A tendon serves to move the bone or structure.

5 Answer - A reflex arc is a neural pathway that controls a reflex. In vertebrates, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord. This allows for faster reflex actions to occur by activating spinal motor neurons without the delay of routing signals through the brain. The brain will receive the sensory input while the reflex is being carried out and the analysis of the signal takes place after the reflex action.

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