BIOLOGY MIDDLE SCHOOL

What is the main function of the circulatory system in multicellular organisms?A.
to bring oxygen into the lung

B.
to put carbon dioxide into all blood vessels

C.
to expel waste products from the body

D.
to transport materials throughout the body

Answers

Answer 1
Answer: The answer here is D because it covers the other options namely A and C while B is not really true.
Multi cellular organisms are made up of billions of cells each specialized to a unique role and these cells are organized into structural and functional units such as tissues and organs.
For each cell and organ to function optimally, it requires oxygen and nutrients and needs carbon dioxide and  metabolic waste taken away  in a  continuous, never ending  process.
A mechanism  is needed to accomplish the important function of transporting the relevant materials to and from the cell. The circulatory system fits this  bill splendidly. It is a specialized organ system which allows blood  and lymph to flow through the entire body carrying nutrients such as glucose, amino acids and electrolytes as well as oxygen to each cell, at the same time carting away carbon dioxide and all sorts of metabolic waste over to excretory organs  to be expelled from the body. 
Answer 2
Answer:

D

oh yeah oh yeah oh yeah

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A purebred wingless red eyed fruit fly is crossed with a purebred winged sepia-eyed fruit fly to produce f1 flies. The f1 flies are crossed to produce f2 flies. What is the phenotypic ratio of the f2 flies

Answers

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How do organisms benefit from adaptations?

Answers

Organisms benefit from adaptations because in order for them to survive, they need to adapt to their surroundings. For example, if a shark didnt have fins or a tail, it wouldnt be able to swim and catch its prey.
Organisms benefit from adaptation by surviving longer, reproduction, blending with their environment, and evolving.

Which statement describes gravity? Check all that applyThere is no defined unit of measurement for gravity
Gravity is the force that pulls objects toward Earth's center
Objects that have a small mass will have no gravitational pull
Gravitational pull between two objects increases as the mass of one increases
Gravitational puli decreases when the distance between two objects increases

Answers

Answer:

gravity is the force that pulls objects towards earths center

Antoinette was diagnosed with hypertension, a noncommunicable disease in which her blood pressure is higher than normal.What is the most likely explanation for why she is hypertensive?

Answers

Answer:

Antoinette was diagnosed with hypertension, a noncommunicable disease in which her blood pressure is higher than normal.  What is the most likely explanation for why she is hypertensive?

Antoinette condition which is hypertension could be as result of excessive stress and deep thought which makes the heart beat the work excessively by pumping more blood and over work the normal working rate.

Anxiety might also contribute to such as well, life burden could enable Anoinette to have such condition.

Explanation:

Answer:

She had a diet high in salt intake

Explanation:

Have a nice day!

The state of florida is the mockingbird. mocking birds eat many types of food, including insects, berries, and seeds. insects and and seeds have hard coverings, but berries are soft. if the plants that make berries don't grow well in one year, which individual mockingbirds will survive?a.) those who sing the loudest
b.) those with the strongest beaks
c.) those with the longest tail feathers
d.) those that lay eggs with the most spots

Answers

b those who have the strongest beaks because insects and seeds have hard coverings the birds with the strongest will live longer then the ones with the soft beaks.

Which development in plants has contributed to the evolution of large trees?

Answers

Answer:

Secondary vascular growth

Explanation:

Secondary growth in the plant allows them to be thicker, unlike primary growth that is apical. Secondary vascular cambium acts as a support for plants especially trees as they grow taller –allowing them to support their own weight. This is what is perceived as wood (secondary xylem) in a tree.

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