BIOLOGY MIDDLE SCHOOL

Which of these describes one of the functions of the nervous system?a)providing the cells of the body with energy
b)sensing changes in the external environment
c)removing waste materials from the body
d)transporting nutrients throughout the body

Answers

Answer 1
Answer: The correct answer in your case would be B - sensing changes in the external environment. Our sensory apparatus ( our eyes, nose, taste, hearing) all help and contribute towards the detection of changes that could be found in the external environment. All of these changes get transmitted and processed in the brain and nervous system in general. 
Answer 2
Answer: A) neurons in the brain are communitive via and has an electrical impulse and is neurotransmitters specialized cells known as neurons transmits signals to different parts of the body

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What are some elements that have two-letter symbols that are he first letters of the word

Answers

Actinium Ac
Aluminum Al
Argon Ar
Barium Ba
Bismuth Bi
Calcium Ca
Cobalt Co
Gallium Ga
Indium In
Lithium Li
Neon Ne
Radium Ra
Scandium Sc
Silicon Si
Xenon Xe

Final answer:

Several elements have two-letter symbols that consist of the first two letters of the element's name, including Aluminum (Al), Boron (B), and Chlorine (Cl). These symbols are universally used in Science for consistency and brevity.

Explanation:

When we look at the periodic table, we find that a number of elements have two-letter symbols that contain the first two letters of the element's name. Some examples of these elements include Aluminum (Al), Boron (B), and Chlorine (Cl). In general, the first letter of a chemical symbol is always capitalized, while the second letter (if present) is lowercase.

These symbols are used universally by scientists in order to provide a concise and standardized representation of each element. When writing chemical equations, it's important to ignore the actual number of letters in the word and just focus on the chemical symbols that represent each element.

Learn more about Chemical Symbols here:

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Which of these is extinct?
a) Dodo bird b) Asiatic lion
c)Elephant d) Leopard

Answers

Answer:

A - dodo bird

Explanation:

Dodo bird : is an extinct flightless bird that was endemic to the island of Mauritius

Asiatic lion - is a panthera leo leo population in India

Elephant - are mammals of the family Elephantidae and the largest existing land animals

Leopard- is one of the five extant species in the genus panthera, a member of the folidae.

What kind of energy transformation occurs when a firework explodes.

Answers

 its chemical to thermal and electromagnetic

What is this type of frog? is it poisonous? ​

Answers

Answer: no

Explanation: eat it

What type of data is recorded by the electrocardiogram?

Answers

Answer : The electrocardiogram records the electrical signals of heart.

Explanation :

Electrocardiogram : It is a type graph that records the electrical signals or rate of the heart. It is also called ECGs.

It is a common test that is used to detect the problems in heart and also monitor the status of the heart in many conditions.

During the ECG, sensors (electrodes) that can detect the electrical activity of the heart are attached to the chest.

Hence, the type of data recorded by the electrocardiogram is the electrical signals of heart.

An electrocardiogram records the electrical activity of the heart.

An increase in population growth___the need for natural resource for survival. A. prevents
B. decreases
C. increases
D. has no effect on

Answers

Answer:

Decreases (B)

Explanation:

The more people, the less suplies.
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