Describe what happens when a keynote species is removed from an ecosystem

Answer:Venter's contribution to science was the invention of a synthetic cell. The correct option is D. Craig Venter created a synthetic cell which is totally controlled by man-made genetic instructions.

Explanation:Just because

Answer:

The correct answer is invented a synthetic cell.

Explanation:

Ventor contributed significantly to humanity and science by discovering a synthetic cell. He did this by developing the genome of a bacterium and by inserting it into a cell. The cell was created by combining together the genome of a pathogen from small DNA stretches, which are produced in the laboratory.  

The produced genome was then administered into a vacant cytoplasm of the associated bacterium. The pathogen utilized is known as Mycoplasma mycoides, it generally infests goats. The cell is the initial synthetic form of life in the world and has opened the gate for various kinds of researches.  

Answer:

Label A: Nucleus

Label B: electron cloud

Explanation:

Without the precise diagram, Label A might refer to the central atom or the atomic number, and Label B could refer to surrounding atoms or the mass number. These labels generally correspond to specific parts of an atom or molecule, which include the nucleus and electrons in the context of atomic structure.

The question appears to be related to the structure of the atom and its components. Although the exact diagram for Label A and Label B is not provided, based on the provided references, we can infer that Label A may refer to the central atom in a molecule, while Label B could be addressing the atoms surrounding the central atom. Moreover, in the context of atomic structure, Label A might signify the atomic number, and Label B might represent the mass number, as indicated in reference to Figure 1.8.3 which states that the atom's symbol includes the atomic number and mass number.

In atomic physics, key parts of the atom typically include the nucleus (comprised of protons and neutrons) and the electrons that orbit around it. The nucleus is the dense center of the atom, containing most of the atom's mass, while the electrons are subatomic particles with a negative charge that move around the nucleus in what are known as electron clouds or shells.

If the diagram provided to the student was similar to the one described in the references, Label A and Label B would likely be pointing to specific parts of the atom or to elements in a compound or molecule depending on the context given within the diagram.

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Answer:

valid

Explanation:

A measurement is considered valid if it actually measures what it is intended to measure, according to the topic of the study.

Validity can be described as accuracy of something. Validity is measuring something which we are actually supposed to measure, whereas reliability shows how consistent or convenient are the results.  Validity states how much accuracy is present in a statement, concept or measurement. The term 'valid' is known to be derived from a Latin word "validus" which means to be strong.

The scientific investigation without dependent and independent variables is observing and counting bird populations, which is an observational study and not a controlled experiment.

The scientific investigation that does not include dependent and independent variables is observing and counting bird populations, which is an example of an observational study. In this type of investigation, researchers are simply making observations without manipulating any factor. Therefore, there isn't an independent variable being altered to see its effect on a dependent variable. However, in the other three options provided, there is a clear manipulation of one variable (the independent variable) to see its effect on another variable (the dependent variable), which classifies them as controlled experiments.

For example, in studying the effect of temperature on bacterial reproduction rates, temperature is the independent variable, and the bacterial reproduction rate is the dependent variable. Likewise, when investigating the effect of mass on the speed at which an object falls, mass is the independent variable, and the falling speed is the dependent variable. In testing a model car's air flow resistance at different wind speeds in a wind tunnel, wind speed is the independent variable, and air flow resistance is the dependent variable.

Answer:

A

Explanation:

The base C always pairs with G, and A pairs with T or sometimes U,

C - G

A - T

The correct pairing of DNA bases, based on Chargaff's rules, is C with G, and A with T. This is due to the structure of these molecules and the number of hydrogen bonds they can form.

In the universe of biology, the DNA bases are paired in a standard and specific manner which is essential to the proper functioning of DNA replication and the transcription of genes. These pairing rules are defined by scientist Erwin Chargaff's rule, also known as Chargaff's rules.

According to these rules, Cytosine (C) always pairs with Guanine (G), and Adenine (A) pairs with Thymine (T). Hence, the correct option among those provided would be A. C with G, and A with T.

This specific pairing is due to the structure of the molecules and the number of hydrogen bonds they can form: C and G form three hydrogen bonds between them whereas A and T form two hydrogen bonds. Any other pairing won't hold the DNA strands together sufficiently.

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Answer:

Explanation:

B?

Answer:THE ANSWER IS D: nose and taste buds.

Explanation:the nose can smell Here's how it works: While you're chewing, the food releases chemicals that immediately travel up into your nose. These chemicals trigger the olfactory receptors inside the nose. They work together with your taste buds to create the true flavor of that yummy slice of pizza by telling the brain all about it!

Answer:

Density is the characteristic property of the substance. Density is related to mass and volume of the substance.

Explanation:

Density of the substance decides whether it will float or submerge in water or any other liquid. If the substance is denser than the liquid then it will sink and if its density is lower than the liquid then it will float.

Density is written in kilogram per cubic meter. For instance, the density of oil is lesser than water and hence, it floats.

Answer:

Active zone

Explanation:

The punnett square would look like this

The punnett square is a resource that was conceived by RC Punnett, a collaborative geneticist for William Batenson (both lived between the end of the 19th century and the beginning of the 20th century, actively participating in the rediscovery of Mendel's work), which greatly facilitates the making of crosses between F-1 heterozygotes, by filling in the boxes that compose it with the genotypes resulting from the crossing performed.

The Punnet square of two organisms where one has the Tt genotype and the other the Tt genotype is shown in the image below:

Answer:

B. carbon dioxide.

Explanation:

In cellular respiration, the products are carbon dioxide (CO2), water (H2O), and energy in the form of adenosine triphosphate (ATP).

In photosynthesis, carbon dioxide (CO2) is used along with water (H2O) and light energy to produce glucose (C6H12O6) and oxygen (O2).

So, if the question is about a product of cellular respiration that is also involved in photosynthesis, the correct answer would be:

B. carbon dioxide.

It plays a role in both processes, being a product of cellular respiration and a reactant in photosynthesis.

Answer:

A

Explanation:

The deep cooler currents in the oceans have more nutrients because of several factors;

When the trade winds push the warm waters towards the east, the cooler water from the bottom upwell (from the west in a cyclic fashion) to replace the displaced water by the winds. They bring with them nutrients and oxygen that is great ‘fodder’ for plankton. The plants are then fed on by smaller fish like shrimps. The smaller fish are then preyed on by bigger fish hence sustaining food chains/webs.

Answer:

Carbohydrates and lipids are both macronutrients and provide several key functions to the human body.

Explanation:

These nutrients have similar chemical structures and the body uses carbohydrates and lipids in similar ways. Carbohydrates are molecules composed of carbon, hydrogen and oxygen, with a ratio of one atom of carbon and two atoms of hydrogen for every atom of oxygen. Lipids have the same elements as carbohydrates, but differ in their linkage.

Answer:

Explanation:

Water reacts with Carbon dioxide to form Carbonic acid, please see equation below:

H2O (water) + CO2 (carbon dioxide) ⇄ H2CO3 (carbonic acid)

Carbonic acid is a weak acid and some of it dissociates to Hydrogen ions and Hydrocarbonate ions, please see equation below:

H2CO3 (carbonic acid) ⇄ H+ (hydrogen ions) + HCO3-

Carbon dioxide dissolves in water to form carbonic acid, which then ionizes to bicarbonate and hydrogen ions in a dynamic chemical equilibrium. This series of reactions plays an essential role in regulating CO₂ and pH levels in the human body and in the carbon cycle in nature.

The relationship between water, carbon dioxide, carbonic acid, bicarbonate, and hydrogen is all linked by a series of chemical reactions. First, carbon dioxide (CO₂) from the atmosphere dissolves in water. This dissolved carbon dioxide then combines with water molecules to form carbonic acid (H₂CO3). The carbonic acid then ionizes in water to form bicarbonate (HCO3-) and hydrogen ions (H+). This process is reversible and forms a dynamic chemical equilibrium in water systems. For example, in the human body, these reactions are actively involved in the transport and regulation of CO₂ and pH levels in the blood.

Moreover, this process also occurs in nature, more than 90 percent of the carbon in the ocean is found as bicarbonate ions. These bicarbonate ions combine with seawater calcium to form calcium carbonate (CaCO3), which contributes significantly to marine organism shells and eventually forms part of the largest carbon reservoir on Earth, limestone.

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Answer:

In chloroplasts

Explanation:

It is produces in the chloroplasts of the cell. Glucose is a simple sugar and photosynthesis produces the glucose and then glucose is transported into the cells.  Chloroplasts are making sugar during the process of converting light energy into chemical energy and those are stored in glucose.

Chloroplasts are the food producers and we can find them in plant cells and eukaryotic algae.

Answer:

The organism Cyanobacteria was the first organism to inhabit t he Earth prior to the rise oxygen in the atmosphere.

Explanation:

The single-celled Cyanobacteria were known to be the first oxygen-producing organisms even before the rise of oxygen in the atmosphere or the "Great Oxidation Event," way back 3.5 million years ago. They were able to survive the harsh conditions of the Earth by photosynthesis. During this process, the Cyanobacteria would use sunlight, water and organic carbon dioxide  to produce sugar for their energy. As a waste product, oxygen was released to the atmosphere. Accumulation of the oxygen in the atmosphere was increased by the presence of the volcanic gases like hydrogen, reacting with the oxygen. This caused a reduction reaction and made a more viable oxygen-rich atmosphere.

Answer:

Matter is anything that has mass and takes up space. Air is all around us, that is what we breath- oxygen-

Explanation:

It's easier to prove that air takes up space.  As you blow into the balloon it will expand and that is a way to prove air is matter.

The cell parts common to all cells are:

Cell ,membrane, Cytoplasm ,Ribosomes, DNA .

Plasma Membrane: Every cell is enclosed by a plasma membrane, a lipid bilayer that separates the cell's interior from the external environment.

It regulates the passage of substances in and out of the cell.

Cytoplasm: The cytoplasm is the semi-fluid substance inside the cell where various organelles are suspended.

It contains water, ions, and molecules necessary for cellular processes.

DNA: Genetic material, in the form of DNA (deoxyribonucleic acid), carries the cell's hereditary information and instructions for cellular functions. It's present in all cells.

Ribosomes: Ribosomes are responsible for protein synthesis. They can be found in both prokaryotic and eukaryotic cells.

They read the genetic code and assemble proteins.

While these components are universal, eukaryotic cells have additional structures such as a nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, and more, which are not present in prokaryotic cells like bacteria and archaea.

These differences highlight the distinction between prokaryotic and eukaryotic cells, but the common components mentioned above form the foundation for all cellular life on Earth.

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Question

What cell parts are common to all of these cells?

Answer:

Plant cells have cell walls and this is how they differ from animal cells because animal cells do not have cell walls. Animals don't need cell walls because they have skeletons that help stabilize their bodies. The cell wall provides structure and strength to the cell. I saw evidence once when I was in a biology class.

I did see evidence of the cell structure in plants. Plant cells have a cell wall, which is a rigid structure that surrounds the cell membrane.

The cell wall is made up of cellulose, a complex carbohydrate that gives plants their strength and rigidity. Animal cells do not have cell walls. The cell wall provides support and protection for the cell.

Plant cells have chloroplasts, which are organelles that contain chlorophyll. Chlorophyll is a green pigment that helps plants to photosynthesize. Animal cells do not have chloroplasts. Plant cells have a large central vacuole, which stores water and other nutrients. Animal cells do not have a central vacuole.

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Answer:

The correct option is D. Freshwater protozoans respond to the hypotonic environment by removing water through a contractile vacuole.

Explanation:

A hypotonic environment can be described as a condition in which the concentration of water is more outside the cell than the inside of a cell. In such a condition, water tends to enter the cell through osmosis. This can cause the cell to be filled excessively with water and burst.

To avoid such circumstances, the freshwater protozoans contain contractile vacuoles. The contractile vacuoles remove excess water from the cell.

answer: is d

Explanation:

Answer:

Homeostasis

Explanation:

Homeostasis is an organism ability to maintain equilibrium [which means balancing opposing forces]. When we sweat our body it is trying to stop overheating.

Answer:

homeostasis would most likely be the answer. homeostasis is an organisms ability to maintain equilibrium (which means when opposing forces are balanced). When a human sweats, the body is trying to keep from overheating. this means the body is keeping itself at one temperature. Hope this helped

Explanation:

brainliest please-

Answer:

[tex]B.[/tex]  [tex]Abiotic[/tex]  [tex]Factors[/tex]

Explanation:

Abiotic factor: Nonliving chemical and physical parts, just like temperature and soil in an ecosystem

As far as the ecosystem is concerned, soil and temperature are abiotic factors.

The biotic factors of the ecosystems are living factors. They consist of all the living organisms and their relationship with each other in the ecosystem.

The abiotic factors are also known as nonliving factors. They include soil, temperature, pressure, salinity, wind, etc.

Thus, temperature and soil are parts of the nonliving factors of the environment.

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The factors that may affect variables are called theories. The correct option is C.

A variable is defined as any property, number, or number of items that can be counted or measured. A variable is also known as a data item.

Dependent variables are so designated in spite of  the thought that their values are to be investigated in a laboratory activity.

This can be done under the presumption or requirement that they are dependent on the value of other variables due to some law or rule.

A dependent variable is one that changes as a result of the independent variable's manipulation.

It is the desired outcome, and it is dependent on your independent variable. In statistics, dependent variables are often referred to as output responses.

Thus, the correct option is C.

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In a hypertonic environment, a cell will shrink due to water loss. In a hypotonic environment, a cell will swell due to water gain. In an isotonic environment, the cell will maintain its size as there is no net water movement.

Whether a cell will shrink or swell depends on the type of environment it is in. When it is placed in a hypertonic environment, which has a higher concentration of solutes, the water will leave the cell to maintain equilibrium, and the cell will shrink. This process is known as crenation.

However, if the cell is in a hypotonic environment where the concentration of solutes is low, water will move into the cell to balance out the solute concentration, causing the cell to swell. If the intake of water goes to excess, the cell may burst, a process known as lysis, due to the excessive influx of water.

Finally, in an isotonic environment, where the concentrations of solutes inside and outside the cell are the same, there is no net water movement, so the cell will neither swell nor shrink.

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Answer:

Explanation:

Key developments in blood transfusion techniques

• Animal experiments over the years 1900-1916 gradually enabled transfusion to become the routine technique it is today. The key developments were:

• George Crile (1907) perfected the technique of transfusion from artery to vein using dogs, and described its application in 32 patients.

• Hustin (1914) showed that addition of sodium citrate could prevent blood from clotting and that citrated blood could be safely transfused into dogs.

• Richard Lewisohn (1915) determined the maximum amount of citrate that could be transfused into dogs without toxicity and thus determined the optimum concentration that could be added to blood for the best anticoagulant effect.

• Weil (1915) showed that citrated blood could be stored for 2 days and still be effective when transfused into guinea-pigs and dogs which had lost blood.

• Rous and Turner (1916) used rabbits to demonstrate that, with certain additives and proper treatment, citrated blood could be stored for 14 days and still be successfully transfused.

Through these animal experiments, the prolonged storage of blood without clotting thus became possible, so enabling the establishment of blood banks, and blood transfusion as a routine procedure.

Answer: false

Explanation:

Bias is leaning in favor of an opinion or statement. A planned procedure to test a hypothesis is called an experiment

Answer:

D

Explanation:

Staining allows for visualization of cells and its organelles under a microscope because cells in their natural form are either transparent or translucent.  There are different staining techniques depending on the type of microscope being used, the type of cell being visualized, identification of cells, and etcetera. In this case iodine is used because it is well taken by starch molecule in the onion cells hence increasing visualization of the cell.

The possible solution that Josey can employ that will make her see the details of the onion cell under a microscope is: D. Josey can apply a stain to her sample, such as iodine.

Most cells and cell structures appear translucent if you try viewing them with a microscope in their natural form. They are not transparent.

To make these cells and their organelles transparent when viewing under a microscope, different staining techniques are usually employed, depending on the type of cells and the microscope being used.

Onion cells can be made transparent under a microscope if it is stained with iodine.

Therefore, the possible solution that Josey can employ that will make her see the details of the onion cell under a microscope is: D. Josey can apply a stain to her sample, such as iodine.

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Answer:

B.Hawaiian

Explanation:

Answer:. Hawaiian

Explanation:

Here is why. Among the options listed, the Hawaiian volcanic eruption type is the least violent. Hawaiian eruptions are characterized by relatively fluid basaltic lava that flows relatively gently from the volcano's vent. The lava often travels in streams or rivers and can create impressive lava fountains, but the explosions and ash clouds associated with Hawaiian eruptions are generally less intense compared to other types of eruptions like Plinian, Pelean, or Strombolian eruptions.

Answer:

B

Explanation: