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3 years ago

Rocks are classified as igneous, metamorphic, or sedimentary according to?

Biology

2 answers:

Mkey [24]3 years ago

8 0

Answer:

their method of formation, or ORIGIN

Explanation:

Rocks can be classified as sedimentary, igneous, or metamorphic based primarily upon differences in their ORIGIN.

prisoha [69]3 years ago

7 0

Answer:

Their characteristics

Explanation:

The chemical composition of the rock, mineral type, texture, etc...

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The state of Florida purchased farmland from landowners in the Everglades to stop farming activities there. The farmlands were o

Olenka [21]

Answer:

A. Populations of native wetlands plants will recolonize the land.

Explanation:

From many years' wetlands are converted into farmlands as they provide retention of soil, proper food and clean water, and the cycling of nutrients. But wetlands should not be permanently converted because it can increase the load on soil and add pollutants (pesticides or fertilizers) in the soil and groundwater.

If the farming stops and water flows on the land again, the native plants present in wetlands will help to recolonize the land which is disrupted by farming activities.

Hence, the correct option is A.

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3 years ago

2. Number the steps of protein synthesis 1-4 (1 being the beginning and 4 being the

Margarita [4]

Proteins synthesis includes transcription and translation. 1) DNA is unzipped and the bases are used to code for a strand of mRNA. 2) mRNA strand attaches to a ribosome. 3) tRNA carries amino acids to the ribosome. 4) Amino acids are linked by peptide bonds to create protein.

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TRANSCRIPTION

In protein synthesis, the first step is to synthesize messenger RNA, mRNA.

The transcription is the coping process of the DNA section, and it happens in the nucleus.

After that, the translation occurs when the formed mRNA moves to the cytoplasm through the nucleus membrane pores.

TRANSLATION

Once in the cytoplasm, it begins the translation process.

mRNA meets a free ribosome that is the primary structure for protein synthesis.

Ribosomes are composed of two subunits, a big one and a small one.

They also associate with different tRNA that carries amino acids.

The ribosome reads mRNA in the 5´ to 3´ direction, and, according to the codons that are being readen, tRNA transfers the correct amino acids to build the polypeptide chain.

Each tRNA has two important sites. One of them is the antidocon that couples with the codon of the mRNA molecule. The other site couples with the coded amino acid.

The new amino acid joins the growing chain through peptidic bonds between the carboxyl and amino groups.

The tRNA leaves the ribosome and is free to join another amino acid and repeat the cycle.

The protein is synthesized from the amino terminus to the carboxy terminus, while the added amino acids to the chain are coded by a codon formed by three bases in the mRNA.

The start and stop codons are used as signals of the synthesis initiation and finish. The ribosome beggins protein synthesis when reading the start codon, and when reaches the stop codon, protein synthesis is over.

According to this theoretical framework, we can order the steps.

1) DNA is unzipped and the bases are used to code for a strand of

mRNA ⇒ Transcription ⇒ Nucleus

2) mRNA strand attaches to a ribosome ⇒ Translation ⇒ Cytosol

3) tRNA carries amino acids to the ribosome and matches with the

correct codon ⇒ Translation ⇒ Cytosol

4) amino acids are linked together by peptide bonds to create protein ⇒ Translation ⇒ Cytosol.

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Related link (steps for protein synthesis) :

brainly.com/question/8539126?referrer=searchResults

brainly.com/question/14274397?referrer=searchResults

6 0

2 years ago

Which statement best describes embryonic stem cells?

Zolol [24]

Embryonic stem cells are capable of self-renewal and unlimited differentiation.

Explanation:

An embryo is at the earliest stages in the growth and development of a higher organism. The cells of an embryo are pluripotent meaning that at the stage, they can differentiate into any type of cell of the organism. Therefore these cells are not determined and are referred to as stem cells. These cells are also self-renewing meaning that the cells can divide more stem cells.

Over time, these cells will begin to differentiate into tissues, organs, organ systems and ultimately into the whole organism. Some of the cells like the nerve,blood and muscle cells will also lose their self-renewal capacity.

Learn More:

For more on stem cells check out;

brainly.com/question/4768606

brainly.com/question/8951249

#LearnWithBrainly

8 0

4 years ago

What is the name of the gas that plants absorb from the air and use to grow

vitfil [10]

Carbon dioxide, or CO2.

Plants produce oxygen for us to breathe, and in exchange they take the gas we breathe out: carbon dioxide.

4 0

4 years ago

Can anybody say what phase each letter goes with? I am having a very hard time

ioda

Answer:

A is called Prophase

B is called Anaphase

C is called Metaphase

D is called Telophase

Explanation:

These can get confusing but I'll explain it for you.

The first stage of mitosis is Prophase.

In this stage the chromosomes become visible and the centrioles separate and move to opposite poles of the cell.

The second stage of mitosis is Metaphase.

In this stage the chromosomes line up across the center of the cell and become connected to the spindle fiber at their centromere.

The third stage of mitosis is Anaphase.

In this stage the sister chromatids separate into individual chromosomes and are pulled apart.

The fourth and last stage of mitosis is Telophase.

During this stage the chromosomes gather at opposite ends of the cell and lose their distinct rod-like shapes. Two new nuclear membranes then form around each of the two regions of DNA and the spindle fibers disappear.

The process that follows the last stage of mitosis is called Cytokinesis.

With two complete copies of the DNA now in two different regions of one cell, the cell membrane will pinch and divide the cytoplasm in half. The result is two individual cells that are identical to the original cell. Each of the two new cells have a complete copy of the DNA and contain all of the organelles that the original cell had.

Hopefully, this eases the problem for you and you understand it better.

Also, this image might help:

Let me know if you any other questions about this.

Good luck:)

4 0

4 years ago