BIOLOGY MIDDLE SCHOOL

After studying about recycling, members of Miguel’sbiology class investigated the effect of various

recycled products on plant growth. Miguel’s lab

group compared the effect of different aged grass

compost on bean plants. Because decomposition is

necessary for release of nutrients, the group

hypothesized that older grass compost would produce

taller bean plants. Four flats containing the same

species of bean plants (25 plants/flat) were grown for

5 days. The plants were then fertilized with compost

as follows: (a) Flat A: 450 grams of two-month-old

compost; (b) Flat B: 450 grams of four-month-old

compost; (c) Flat C: 450 grams of six-month-old

compost; (d) Flat D: 0 grams of compost. The flats

of beans were planted in the same type of soil. The

plants received the same amount of sunlight and

water each day. At the end of 30 days, the group

recorded the height of the plants in centimeters. What is the flaw in this experiment?

Answers

Answer 1
Answer:

Answer:

i wish i could help dude sorry

Explanation:
Answer 2
Answer:

Answer:

im good like dat

Explanation:

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Her immune system is exhibiting the _ line of defense. This defense is part of _ immunity.

Answers

last line of defense is the first part.

and the defense is part of her system immunity. this makes sense since the immune system is used to guard against viruses and diseases

What is the difference between whitecap and swell

Answers

Whitecap and swell are the two types of waves which are generated by moving over of water.

What is whitecap and swell?

Waves are normally generated by the wind moving over water surface. They indicate the speed of the wind in the area. Swell is the wave which usually with smooth tops and that have moved beyond the area where they were first generated.

Height of waves varies over time. The wave height is calculated statistically as the average height of the highest one-third of the waves that is experienced over time. Swell waves are the regular, longer period waves which are generated by distant weather systems. They may travel over thousands of kilometers distance. A whitecap is a wave formed when the narrow crests of a wave are blown off by the winds. This creates a mixture of air and water.

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A whitecap is a wave that is breaking– it is characterized by the white water/foam on the top of the wave. 
A swell is a slow, rolling wave that does not have the white water on top. Swells tend to be larger. 
Hope that helps!

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

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. 

D

oh yeah oh yeah oh yeah

What word best describe chlorophyll

Answers

Clorophyll is a green pigment, present in all green plants and in cyanobacteria, which is responsible for the absorption of light to provide energy for photosynthesis.

Which statement best. describes the fossil record?it is a complete record
it is an incomplete record
most fossils are older than 5. billion years
all fossils are younger than 600 years

Answers

Answer:

It is incomplete record

Explanation:

I took the quiz and got it right.

The four types of nitrogen bases of DNA nucleotides are 1________,2______, guanine, and cytosine.1.chlorine
adenine
ermine
tidine

2.fluorine
purine
thymine
thalamine​

Answers

The four types of nitrogen bases of DNA nucleotides are adenine, thymine, guanine and cytosine.

What is DNA?

DNA is defined as deoxyribonuclic acid and it is a polymer made up of two polynucleotide chains that arranged in foiled structure to form a double helix carrying genetic information for the various processes such as growth development functioning and reproduction.

There are four nitrogen bases of DNA nucleotides are such as adinine, thymine, guanine and cytosine.

Friedrich miescher discovered DNA in the year of 1860.

The main function of DNA is to carry information from one generation to another generation this is the reason due to which DNA is also known information molecule.

In our body DNA is found in the nucleus of the cell and it is known as nuclear DNA.

The shape of DNA is double helical structure.

Siblings share only about 50% of same DNA due to the reason of recombination. The life span of DNA is 521 years.

Therefore,the four types of nitrogen bases of DNA nucleotides are adenine, thymine, guanine and cytosine.

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Answer:

1. Adenine

2. Thymine

Explanation:
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