Only 3% of the Earth's water is fresh and two thirds of that is polluted.
True or false ?

Answer:

The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body. Air moves in and out of the lungs through the trachea, bronchi, and bronchioles. Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart.

Answer:

Metamorphic rock

Explanation:

When a sedimentary rock goes deep underground, it experiences heat and pressure. This distorts the rock and turns it into a metamorphic rock

Answer:

components of nucleotide is  Sugar, phosphate, nitrogen

Explanation:

Answer:reproduction

Explanation: when the sperm and egg unite to form a single cell, the number of chromosomes is restored in the offspring. Meiosis begins with a parent cell that is diploid, meaning it has two copies of each chromosome.

Answer:

15 m/s

Explanation:

75m/s/5 is 15ms

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Answer:

stronger and longer organ are able to mate more with females, whereas the shorter one didn't stand a chance.

Answer: On the Y chromosome

Answer: 21th

Explanation: Down syndrome a.k.a trisomy 21 because it’s caused by an extra copy of a chromosome 21.

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1. -violet, indigo, blue, green, yellow, orange, red

2. -refraction and reflection

Answer:

Heat energy is absorbed as chemical potential energy is transferred from oxygen molecules to ATP molecules. Heat energy is released as chemical potential energy is transferred from oxygen molecules to ATP molecules.

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Answer:

Carbohydrates are organic compounds that contain only carbon, hydrogen, and oxygen. They are the most common of the four major types of organic compounds. There are thousands of different carbohydrates, but they all consist of one or more smaller units called monosaccharides.

Answer:

The molecules will move directly across the membrane from

inside the cell to outside the cell.

Explanation:

Ape-x

Facilitated diffusion is the type of transportation that moves the ions and the molecules. The molecules are transported directly through the membrane from inside to outside. Thus, option B is correct.

Facilitated diffusion is the transportation of the molecules and ions across the cell membrane along the concentration gradient. It is a passive transport that involves the movement down the gradient.

The molecules are transported by the membrane proteins that facilitate their movement from inside of the cell towards the outer space of the cell. Unlike simple diffusion, facilitated diffusion uses energy in the form of ATP.

Therefore, the molecules present inside the cells will move directly towards the outside of the cell.

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Answer:

A. Space

Explanation:

You need gravity to stay on the planet and not drift off.

You need air to keep you alive.

You need water to keep you alive.

You need energy to do things like walk around, use your brain, etc.

Answer:

Space

Explanation:

Living organisms need air, water, energy. Gravity is technically also needed since all living organisms on earth are accustomed to it.

Answer:

Health care workers who work with blood or other bodily secretions which may carry the HBV virus must receive a free HBV vaccination.

Answer:

Lack of movement allows blood to circulate in a vein very slowly by sitting still for long periods of time. Slow-flowing blood is more likely to clot than normal-flowing blood. This issue is referred to as deep vein thrombosis (DVT). In DVT, as seen in the diagram, the clot normally takes place in a leg vein.

Explanation:

Lack of movement by still for long periods of time makes blood flow very slowly in a vein it is because the blood that flows slowly is more likely to clot than blood that flows normally.

Large leg veins are saphenous veins. The leg veins that become weak in the most people age are the superficial veins and perforator veins.

The superficial and undesirable visible branches are known as varicose, reticular, and spider veins.

When sitting still, the flow of blood flow becomes slow, it is caused because the blood that flows slowly is more likely to clot than blood that flows normally.

This condition is called deep vein thrombosis.

Thus, due to this condition, blood flow in a leg vein is slow when there is lack of movement.

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Answer:

False

Explanation:

Different areas and seas have higher or lower salt levels

Answer:

I think the answer is C but aia could be wrong

Explanation:

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The  Punnett square to help you determine the probability for each color of jellyfish percentage would be "goobers" are 50%.

Goobers is a slang term used to refer to someone who is naive or foolish. It can be used to describe a person who is easily taken advantage of or someone who is generally inept. Goobers are often seen as endearing and often have an innocent quality about them. They are also often seen as lacking in common sense and understanding of the world around them.

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Answer:

The upper arm (humerus)

Explanation:

Answer:

Most caves are created when slowly-moving water dissolves, or eats away at limestone rock, creating spaces, caverns, and tunnel-like passages. ... The waters that made Wind Cave probably sat in the limestone for long periods of time. Water did not flow through the cave like a river.

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The answer is Dissolved carbon dioxide

Answer:

It is restriction enzymes

Explanation:

Answer:

Exocytosis is the process by which cells move materials from within the cell into the extracellular fluid. Exocytosis occurs when a vesicle fuses with the plasma membrane, allowing its contents to be released outside the cell. ... Carbon dioxide and water are removed from these cells via exocytosis.

Explanation:

Answer:

flora and fauna and also some types of invasive species

Answer:

they are organic molecules consisting of a nucleoside and a phosphate

Explanation:

Answer: A nucleotide is an organic molecule that is the building block of DNA and RNA. The nucleotide also have functions related to cell signaling, metabolism, and enzyme reactions

Explanation:

Answer:

[tex]\boxed {\boxed {\sf B. \ 40 \% \ cytosine}}[/tex]

Explanation:

First, recall the base pairs in DNA:

We know this strand of DNA has 10% adenine. Since A and T pair, there must also be 10% guanine.

So, A and T make up 20% of the DNA strand.

That leaves 80% for cytosine and guanine. They are pairs, so they share this percentage equally.

There must be 40% cytosine and 40% guanine.

The strand of DNA has 40% cytosine

Answer:

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1. Nucleotides are joined together by covalent bonds between the phosphate group of one nucleotide and the third carbon atom of the pentose sugar in the next nucleotide. This produces an alternating backbone of sugar - phosphate - sugar - phosphate all along the polynucleotide chain.

2. DNA replication is one of the most basic processes that occurs within a cell. Each time a cell divides, the two resulting daughter cells must contain exactly the same genetic information, or DNA, as the parent cell. To accomplish this, each strand of existing DNA acts as a template for replication.

3. Enzymes that participate in the eukaryotic DNA replication process include: DNA helicase - unwinds and separates double stranded DNA as it moves along the DNA. It forms the replication fork by breaking hydrogen bonds between nucleotide pairs in DNA. DNA primase - a type of RNA polymerase that generates RNA primers.

4. Chargaff's rules state that DNA from any species of any organism should have a 1:1 stoichiometric ratio (base pair rule) of purine and pyrimidine bases (i.e., A+G=T+C) and, more specifically, that the amount of guanine should be equal to cytosine and the amount of adenine should be equal to thymine.

5. RNA plays a central role in turning genetic information into your body's proteins. This remarkable molecule also carries the genetic instructions for many viruses, and it may have helped life get its start.

6. the three main structural differences between RNA and DNA are as follows: RNA is single-stranded while DNA is double-stranded. RNA contains uracil while DNA contains thymine. RNA has the sugar ribose while DNA has the sugar deoxyribose.

7. Of the many types of RNA, the three most well-known and most commonly studied are messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA), which are present in all organisms.

8. Transcription is the process by which the information in a strand of DNA is copied into a new molecule of messenger RNA (mRNA). DNA safely and stably stores genetic material in the nuclei of cells as a reference, or template.

9. A codon is a sequence of three DNA or RNA nucleotides that corresponds with a specific amino acid or stop signal during protein synthesis. DNA and RNA molecules are written in a language of four nucleotides; meanwhile, the language of proteins includes 20 amino acids.

10. Translation is the process of translating the sequence of a messenger RNA (mRNA) molecule to a sequence of amino acids during protein synthesis. The genetic code describes the relationship between the sequence of base pairs in a gene and the corresponding amino acid sequence that it encodes.

11. Messenger RNA (mRNA) molecules carry the coding sequences for protein synthesis and are called transcripts; ribosomal RNA (rRNA) molecules form the core of a cell's ribosomes (the structures in which protein synthesis takes place); and transfer RNA (tRNA) molecules carry amino acids to the ribosomes during protein.

12. A mutation is a change in a DNA sequence. Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses.

13. A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke. Mutations can occur during DNA replication if errors are made and not corrected in time.

14. There are three types of DNA Mutations: base substitutions, deletions and insertions. Single base substitutions are called point mutations, recall the point mutation Glu -----> Val which causes sickle-cell disease. Point mutations are the most common type of mutation and there are two types.

15. By changing a gene's instructions for making a protein, a mutation can cause the protein to malfunction or to be missing entirely. When a mutation alters a protein that plays a critical role in the body, it can disrupt normal development or cause a medical condition.

16. Cancer refers to any one of a large number of diseases characterized by the development of abnormal cells that divide uncontrollably and have the ability to infiltrate and destroy normal body tissue. Cancer often has the ability to spread throughout your body. Cancer is the second-leading cause of death in the world.

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Answer:

Reducing our carbon footprint. For example, instead of using a car, that releases gas from fossil fuels, to go to work, ride a bike instead to reduce emissions from fossil fuels.

Explanation: