Please help me I dont know the answer

Answer:

Beryllium is the element with the atomic number 4.

Answer:

Respiratory System: The respiratory system's main job is to move fresh air into your body while removing waste gases.

Nostril: To warm air on inhalation and remove moisture on exhalation.

trachea: Serves as passage for air, moistens and warms it while it passes into the lungs, and protects the respiratory surface from an accumulation of foreign particles.

bronchiole: To deliver air to a diffuse network of around 300 million alveoli in the lungs.

alveoli: To exchange oxygen and carbon dioxide molecules to and from the bloodstream during breathing.

pharynx: Helps the respiratory system by allowing air to make its way to the respiratory tract.

larynx: Produces vocal sounds and prevents the passage of food and other foreign particles into the lower respiratory tracts.

lungs: To help oxygen from the air we breathe enter the red cells in the blood.

ribs: To aid respiration and help protect the lungs.

diaphragm: Contracts and flattens when you inhale. Creates a vacuum effect that pulls air into the lungs, and relaxes when exhaling.

Answer:

The correct answer is - species at risk for extinction.

Explanation:

Extinction is a threat to species of any living organism. The death or removal of last individual of a species is the condition of extinction.

It is commonly referred to the species as mostly species extinct from earth. Any size or type of species of living organism can be extinct.

Answer:

b is the answer

Explanation:

edge2021

According to the graph, the regions that are expected to reach a population of 50 million people in the year 2040 are (A). Mexico, Central America, the Caribbean island, and South America.

A population graph is a type of graph that represents the distribution of population, increase or decrease of population of different areas or countries.

This population graph shows the population of different countries, some countries already reached 50 million. The countries which will be reached are in the purple line on the graph that are Mexico, Central America, the Caribbean island, and South America.

Thus, option (A), Mexico, Central America, the Caribbean island, and South America will have 50 million people in the year 2040.

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Answer:

A. She hopes to discover if the oil is still floating on the surface.

Answer:

The correct answer is - helps speed up the process of transcription.

Explanation:

RNA polymerase binds to the DNA sequence and copy a single DNA sequence into RNA and helps a single gene to produce hundreds or even thousands of RNA molecules during transcription.

It helps in the speed up the transcription by copying the sequence and producing mRNA for translation process later.

Answer:

I hope this helps.

Explanation:

Answer:

vascular tissues

Answer:

The components of a mixture are the items that are mixed together.

Answer:

Yeast cells likely do not have receptors that bind to this specific water-soluble mouse hormone

Explanation:

Receptors are molecules capable of binding specific signaling molecules (i.e., ligands). For example, steroid receptors can only bind to specific steroid hormones (e.g. estrogen, progesterone). Plasma membrane receptors are protein receptors that bind to water-soluble ligands. These receptors are embedded in the cell plasma membrane and usually contain several transmembrane domains. Examples of cell membrane receptors include G protein-coupled receptors (GPCRs), enzyme-linked protein receptors and ion channel receptors.

Answer:

the answer is (C) haploid + haploid = diploid

Explanation:

edge 2021

Haploid+ Haploid = Diploid represents fertilization. So, the correct option is (C).

Fertilization is defined as the process in which two gametes where one male and one female first form a zygote and then lead to the development of an embryo.

These germ cells are cells that give rise to gametes – either egg cells that are female gametes or sperm cells that are male gametes.

These germ cells are the only cells that can undergo both mitosis and meiosis. These are the diploid cells present in the gonads. After meiosis, haploid gametes are produced. In fertilization two haploid gametes fuse (n+n) and form a diploid zygote (2n)

Thu, Haploid+ Haploid = Diploid represents fertilization. So, the correct option is (C).

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Answer:

Selective breeding takes place over many generations. These are the main steps for both plants and animals involve:

Hope this answer helps you..!!

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Select this answer as the BRAINLIEST!!

Answer:

I think the answer is Selective breeding takes place over many generations. These are the main steps for both plants and animals involve:

Decide which characteristics are important enough to select.

Choose parents that show these characteristics from a mixed population. They are bred together.

Choose the best offspring with the desired characteristics to produce the next generation.

Repeat the process continuously over many generations, until all offspring show the desired characteristics.

Hope this answer helps you ^^

The SARS-CoV-2 non-structural protein 1 (Nsp1), also referred to as the host shutoff factor, suppresses host innate immune functions. By combining cryo-electron microscopy and biochemistry, we show that SARS-CoV-2 Nsp1 binds to the human 40S subunit in ribosomal complexes, including the 43S pre-initiation complex and the non-translating 80S ribosome. The protein inserts its C-terminal domain into the mRNA channel, where it interferes with mRNA binding. We observe translation inhibition in the presence of Nsp1 in an in vitro translation system and in human cells.

Answer:

DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly every cell in a person's body has the same DNA.

Answer:

DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly every cell in a person's body has the same DNA.19-Jan-2021

Answer:

During active transport, substances move against the concentration gradient, from an area of low concentration to an area of high concentration. This process is “active” because it requires the use of energy (usually in the form of ATP). It is the opposite of passive transport.

Answer:

why does the moon get smaller and dissapear?"

Explanation:

One of the questions that ancient mythology would try to answer would be "why does the moon get smaller and dissapear?" Ancient mythology stories always try to explain everyday occurrences in individuals lives that did not really have a simple explanation at the time due to lack of knowledge. Therefore, these stories usually involved the acts of deities to explain the different unknown events in the world such as the moon dissapearing, shooting stars, volcanoes, hurricanes, etc.

Answer:

ABC

Explanation:

Ask questions, make a hypothesis, test the hypothesis, analyze results, draw conclusions, communicate results.

Answer:

The proton pump results....

Explanation:

double checked my notes

Aquaporins result in a combination of positive charges intracellularly and negative charges extracellularly

What are Aquaporins?

Aquaporin is a group of membrane proteins found in cell membranes and selectively permit water to pass into and out of the cell. Also known as water channels, aquaporins are integral membrane pore proteins. Aquaporins are found in plants, bacteria and animals. They are observed in the vacuolar membranes and plasma membranes. The basic function of most aquaporin is to transport water across cell membranes in response to osmotic gradients created by active solute transport. Aquaporins enable passive transport which means they allow the movement of molecules across a cell without using energy.

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Answer:

due to their excessive numbers in tissues. ... because their developmental potential is limited to certain tissues. In plants, most differentiated cells retain. A) only a tiny fraction of their original set of genes.

Explanation:

hmm i think this is your answer

Answer:

Advantages:

Produces no polluting gases.

Does not contribute to global warming.

Very low fuel costs.

Low fuel quantity reduces mining and transportation effects on environment.

High technology research required benefits other industries.

Disadvantages:

Waste is radioactive and safe disposal is very difficult and expensive.

Local thermal pollution from wastewater affects marine life.

Public perception of nuclear power is negative.

Costs of building and safely decommissioning are very high.

Cannot react quickly to changes in electricity demand.

Answer:

 true it consumes some ATP as well as producing it

true it produces ATP that can be directly used by cells

true it does not directly require oxygen to operate

false it produces more ATP than any of the other respiration reactions

Glycolysis consumes some ATP as well as producing it, it produces ATP that can be directly used by cells and it does not directly require oxygen to operate. Hence option A,B and C is correct.

ATP stands for adenosine triphosphate. It is defined as an organic substance that fuels a variety of functions in living cells, including chemical synthesis, condensate dissolution, nerve impulse transmission, and muscular contraction. It is a byproduct of the photophosphorylation, cellular respiration, and fermentation processes and serves as the primary energy currency of the cell.

Glycolysis is defined as a chain of events that convert glucose into two pyruvate molecules, which have three carbons each. Glycolysis is a cytoplasmic process that breaks glucose down into two molecules with three carbons apiece and releases energy. Hexokinase, a phosphorylating enzyme, assists in the phosphorylation process that traps glucose.

Thus, glycolysis consumes some ATP as well as producing it, it produces ATP that can be directly used by cells and it does not directly require oxygen to operate. Hence option A,B and C is correct.

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Answer:

Roughages increase fecal volume and promote peristalsis

Explanation:

Constipation refers to the condition in which bowel evacuations occur infrequently, leading to health problems. Some of the most common causes of constipation include 1-insufficient intake of dietary fibers or roughages, 2-poor hydration, 3-lack of physical exercise, 4-abuse of laxatives, etc. Dietary fibers are divided into two classes based on their water solubility: soluble and insoluble. These fibers represent the part of plant foods that the body can't digest, which absorbs and retains water (soluble fibers) as foods pass through the bowel and create bulk (insoluble fibers), thereby leading to regular bowel habits.

Answer:

Air moves out of the lungs when the pressure in the lungs is greater than the pressure in the atmosphere.

Answer:

Movement of a solvent (such as water) into a solution with a higher solvent concentration by means of a semi-permeable membrane (as from a live cell), which tends to equal solute concentrations in the membrane on both sides.

Explanation:

Osmosis, the spontaneous transition, distribution, or diffusion of water and other solvents over a semipermeable membrane. In 1877, a German physiologist, Wilhelm Pfeffer, researched the process, which is important in biology.

Osmosis is the passage of water down its concentration gradient, across a semi-permeable membrane. An everyday example is a plastic wrap in your kitchen: it allows air and water vapor to move across it, but no water or food. The membranes of cells are semi-permeable, too.

Answer:

Nucleoside

Explanation:

Nucleotide is an organic compound which is made from of nitrogenous base, a sugar, and a phosphate group.

Answer:

False

Explanation:

Science is more about gaining knowledge than it is about simply having knowledge. Science is a way of learning about the natural world that is based on evidence and logic. In other words, science is a process, not just a body of facts. Through the process of science, our knowledge of the world advances.