BIOLOGY MIDDLE SCHOOL

An object is accelerating if there is a change in speed and/or ________.A. Time

B. Position

C. Direction

D. Displacement

10 Points to answers correct first.

Future Thank you for help! <3

Answers

Answer 1
Answer: the answer is direction

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PLEASE HELP I'll MARK THE BRAINLIEST1.) A vessel that carries oxygen-rich blood to the heart muscle is called a(n): *A.) Coronary ArteryB.) VeinC.) VentricleD.) Atrium2.) A group of cells that receives messages about the body's oxygen needs and sends out signals to adjust the heart rate is called the: *A.) AtriumB.) Lymph NodeC.) ValveD.) Pacemaker3.) Blood components that helps the body control bleeding are: *A.) HemoglobinB.) Red Blood CellsC.) White Blood CellsD.) Platelets4.) Plasma is mostly composed of: *A.) Blood CellsB.) WaterC.) ProteinsD.) Hemoglobin5.) Which of the following is NOT a characteristic of a vein? *A.) Valves prevent backward flow of bloodB.) Returns blood to the heartC.) Walls are one cell thickD.) Walls are generally thinner than those of arteries6.) The largest artery in the body is called the: *A.) AortaB.) AtriumC.) PacemakerD.) Coronary Artery7.) The network of vessels that returns fluid to the bloodstream is called the: *A.) Lymphatic SystemB.) VeinsC.) ArteriesD.) Circulatory System8.) Hemoglobin is a protein that binds easily to: *A.) White Blood CellsB.) OxygenC.) FibrinD.) Platelets9.) Which of the following structures pumps blood into arteries leading to the lungs? *A.) Right AtriumB.) Left AtriumC.) Right VentricleD.) Left Ventricle10.) Which of the following structures is NOT part of the cardiovascular system? *A.) HeartB.) Blood VesselsC.) BrainD.) Blood11.) True/False: The force of the heart's contracting atria causes blood pressure. *A.) TrueB.) False12.) True/False: Capillary walls must be very thick to withstand the high force of blood pumped by the heart. *A.) TrueB.) False13.) True/False: White blood cells defend the body against disease. *A.) TrueB.) False14.) True/False: Blood travels in two directions in the body. *A.) TrueB.) False15.) True/False: Blood types are determined by proteins known as marker molecules that are on red blood cells. *A.) TrueB.) False16.) Fill in the Blank: The right and left __________________ are the two lower chambers of the heart. *17.) Fill in the Blank: A sphygmomanometer is an instrument that measures ____________________________. *18.) Fill in the Blank: A flap of tissue that prevents blood from flowing backward is a(n) ______________. *19.) List two of the three main roles of the cardiovascular system: *20.) Tell me anything else that you learned in science about the cardiovascular system:
What height setting of the first hill will cause the 35 g car to reach the egg in 1.88 s?
Write an argumentative paragraph explaining the consequences of artificial selection. This paragraph needs to include facts and you need to cite your resources. This must be a minimum of 8 sentences long.
What level of organization is the human heart?

3. Which BEST compares compounds and mixtures? A Compounds and mixtures contain a variety of elements, but the elements in a mixture do not retain their original characteristics when combined.

 B Compounds and mixtures contain a variety of elements, but the elements in a mixture are able to last longer because they are chemically combined.

 C Mixtures can be made up of elements and compounds that lack definite proportions, but a compound is composed of elements that are present in definite proportions.

Answers

Answer:

The statement that BEST compares compounds and mixtures is option C:

Explanation:

"C Mixtures can be made up of elements and compounds that lack definite proportions, but a compound is composed of elements that are present in definite proportions."

Answer:

 A Compounds and mixtures contain a variety of elements, but the elements in a mixture do not retain their original characteristics when combined.

Explanation:

As Compounds consist of two or more atoms that can be broken down into simple elements.

A Mixture contains two or more atoms that can be mixed together. Those atoms are not chemically combined.

Which gland of the endocrine system is located near the brain? A. pituitary gland B. thyroid gland C. adrenal gland D. pancreas

Answers

A. The Pituitary Gland
Answer is a pituitary gland

About how long does water vapor remain in the air?

Answers

 It doesn't stay up there for long and there are several different ways that it can get up there. hope this helps:)

What are the 4 characteristics of a mineral?

Answers

The four characteristics of a mineral are:

1. Cleavage- the way it breaks, whether flat or roughly.
2. Luster- the way light reflects off of it, i.e. pearly, shiny, etc.
3. Streak- the color that its powder is
4. Hardness, for example, diamond is the hardest mineral, this is usually measured on the Mohs scale.

Overwhelming scientific evidence suggests that all living things share acommon *

ancestor
cell type

energy source
cell structure

Answers

The answer is ancestor.

Energy source is incorrect, as plants function through photosynthesis unlike animals. Different organisms also have different types and structures of cells. Plant cells for example, are much different than that of an animal.

Traditionally, lemurs, and lorises are classified as:A. Anthropoids
O B. Hominoids
OC. Prosimians
D. Monkeys
E. Apes

Answers

Answer:

C. Prosimians
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