Answer:
The individual calcium atom has a positive, not negative, 2 charge.
Explanation:
The error in her study is in the second line of her note which suggests that the individual calcium atoms becomes ions with a negative 2 charge.
When atom loses electrons, it has a net positive charge on it. Not a negative charge. This is because the number of protons is now more than electrons. Therefore, a net charge on the calcium atom will be a positive one. This is her mistake.Answer:
B) The individual calcium atom has a positive, not negative, 2 charge.
Explanation:
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Different plant species require different amounts of direct sunlight in order to flower. A student designed an experiment to determine the length of exposure to direct sunlight necessary for a specific plant species to produce flowers. The student collected the data below.
0 hours, 0% with flowers
9 hours, 0% with flowers
1 hour, 0% with flowers
5 hours, 90% with flowers
3 hours, 80% with flowers
7 hours, 10% with flowers
Identify the:
independent variable-
dependent variable-
control group-
experimental group-
constant-
Answer:
Independent variable: LENGTH OF EXPOSURE TO DIRECT SUNLIGHT
Dependent variable: PRODUCTION OF FLOWERS
Control group: THE GROUP OF PLANT THAT WASN'T EXPOSED TO SUNLIGHT i.e. 0 hours
Experimental group: THE GROUP OF PLANTS THAT WERE EXPOSED TO SUNLIGHT
Constant: THE SAME PLANT SPECIES
Explanation:
Independent variable is the variable that the experimenter changes or manipulates in an experiment. In this experiment, the experimenter exposes the specific plant species to sunlight at different length of time, hence, the LENGTH OF EXPOSURE TO DIRECT SUNLIGHT is the independent variable.
Dependent variable is the variable which is measured in an experiment. In this experiment, the measured/dependent variable is the PRODUCTION RATE OF FLOWERS by the plant species.
Control group is the group in an experiment that does not receive the variable being tested. In this experience, the control group is THE GROUP OF PLANT THAT WASN'T EXPOSED TO SUNLIGHT i.e. 0 hours
Experimental group is the group of am experiment that is exposed to the experimental treatment (sunlight). In this case, the experimental group is THE GROUP OF PLANTS THAT WERE EXPOSED TO SUNLIGHT.
Constants are variables of an experiment that must be kept unchanged for all groups throughout the experiment in order not to affect the experiment's outcome. In this experiment, the constant is THE SAME PLANT SPECIES used,
Please hurry
1. Identify one environmental factor that could cause a base sequence in DNA to be changed to a different base sequence.
2. Explain why, in a mammal, a mutation in a gamete may contribute to change in the population of the organism while a mutation a body cell will not.
Answer:
Explanation:
1 Long term exposure to harmful genotoxic chemicals or ionizing radiation can cause changes in the base sequence of DNA.Chemicals might induce DNA mutations, such as polycyclic hydrocarbons (fumes found in oil stations, or smoke from a tobacco cigarette), intercalating agents such as Ethidium Bromide (carcinogen), but also radiations such as UV-radiation (C and T bases are most vulnerable and would bind to identical bases unstead of their
2 Genetic changes that are described as de novo (new) mutations can be either hereditary or somatic. In some cases, the mutation occurs in a person’s egg or sperm cell but is not present in any of the person’s other cells. In other cases, the mutation occurs in the fertilized egg shortly after the egg and sperm cells unite. (It is often impossible to tell exactly when a de novo mutation happened.) As the fertilized egg divides, each resulting cell in the growing embryo will have the mutation. De novo mutations may explain genetic disorders in which an affected child has a mutation in every cell in the body but the parents do not, and there is no family history of the disorder.
Somatic mutations that happen in a single cell early in embryonic development can lead to a situation called mosaicism. These genetic changes are not present in a parent’s egg or sperm cells, or in the fertilized egg, but happen a bit later when the embryo includes several cells. As all the cells divide during growth and development, cells that arise from the cell with the altered gene will have the mutation, while other cells will not. Depending on the mutation and how many cells are affected, mosaicism may or may not cause health problems.
what is empty space that is free of matter
When you exhale, what happens in the lungs?
A. Air moves from high pressure (in the lungs) to low pressure (outside)
B. Space in the lungs increases
C. Lung pressure decreases
D. Air moves from low pressure (in the lungs) to high pressure (outside)
Answer:
Conversely, exhalation moves the diaphragm up into the chest cavity and reduces the space in it. This forces the air, which is dense with carbon dioxide at that point, out of the lungs and windpipe. It then exits the body either through the nose or mouth. Usually, this requires no physical effort from the body.
Explanation:
So its A
Please help me
Which particle, protons, neutrons, or electrons, has the LEAST mass?
Answer:
Electrons are much smaller in mass
Explanation:
Although similar in mass, protons are positively charged, while neutrons have no charge. Therefore, the number of neutrons in an atom contributes significantly to its mass, but not to its charge. Electrons are much smaller in mass than protons, weighing only 9.11 × 10−28 grams, or about 1/1800 of an atomic mass unit.
Explain how coupling reactions allow a cell to capture the free energy of glucose oxidation rather than allow it to escape to the environment through heat
Answer:
This reaction is endothermic, therefore the energy uptake will be the main pillar of metabolism, in addition, the phosphorylation energy will always be used for the cell, on the other hand, in the case of phosphorylation, reverse effects will be seen, and this is when a I play an enzyme called kinase.
On the other hand, the intake or capture of energy in the form of energy currency is understood as the medium GIVES energy to the cell, it captures it and is not exothermically released in the form of heat.
Explanation:
These processes happen because of it at postpondrial moments, where the insulin hormone is high and it is sought to phosphorylate glucose to retain it inside the cell so that it does not dissipate exothermically.
This is the mechanism by which the human generates energy reserves of complex carbohydrates such as glycogen.
a, b, c, or d. first answer gets brainliest
A water molecule is attracted to another water molecule. This is an example of
What are the two endocrine organs that work together to control blood calcium levels?
Answer:
:)))))
Explanation:
:::::::::::::::::::::::))))))))))))))))))
mountain trekkers use alcohol thermometer, why?
Answer:
They are used rather than mercury thermomethers to in very cold religions because alcohol has lower
Explanation:
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Can u spot the difference in the sentences above?
Actual questions:
Answer:
they are too tiny, can't read them
Answer:
you need to make it bigger pls make another one
Explanation:
Which best describes the process of insertion?
A.occurs when part of a chromosome breaks off and is placed into the middle of another chromosome
B.occurs when part of a chromosome breaks off and reattaches backward on the same chromosome
C.occurs when part of a chromosome breaks off and does not reattach
D.occurs when part of a chromosome breaks off and attaches to another chromosome
Answer:
A.occurs when part of a chromosome breaks off and is placed into the middle of another chromosome
Explanation:
Edge 2020
Answer:
A
Explanation:
EDGE2021 :-)
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Analyze: Click the FOREST tab. Click the plus (+) button for mushrooms several times. Click Advance year a few times. Select the DATA tab. How did adding mushrooms affect trees? GIZMOS.
Answer
82
Explanation:
i think
Answer:5b
Explanation:itchy
2. Chemicals that absorb light
are called
Answer:
Chemicals that absorb light are called Pigments. 3. Chlorophyll makes plants look green because it Reflects green light.
Explanation:
Answer:
pigments
Explanation: Chlorophyll makes plants look green because it Reflects green light.
List some common adaptations in organisms
Density describes how much mass is contained in a certain volume. Knowing how far apart molecules are in each state, which best ranks solids, liquids, and gasses from least dense to most dense?
Gasses are denser than liquids.
Liquids are denser than solids.
Gasses are less dense than solids.
Solids are less dense than liquids.
Solids have a high density because the particles are very close together, a liquid mass is slightly less dense, and a gas mass has a very low density with the particles much further apart.
What Is a Density?The measure of how densely a material is packed together is called density. As the mass per unit volume, it has that definition. Density Formula: D or Density Symbol: D ρ = m/V where the object's mass (m), its volume (V), and its density () are all given.
Generally, gases are less dense than liquids, while liquids are less dense than solids. This is due to the fact that solids have tightly packed particles, liquids have materials in which particles can slide around, and gases have free-moving particles.
Therefore, Gasses are less dense than solids because particles are far away from each other in gas masses.
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What are three methods for detecting radioactively labeled DNA in an experiment?
Answer:
Limitations. detect low abundance DNA binding proteins from lysates. test binding site mutations using many probe configurations with the same lysate. test binding affinity through DNA probe mutational analysis. non-radioactive EMSA possible using biotinylated or fluorescently labeled DNA probes.
Explanation:
Answer:
Proteins interact with DNA through electrostatic interactions (salt bridges), dipolar interactions (hydrogen bonding, H-bonds), entropic effects (hydrophobic interactions) and dispersion forces (base stacking). These forces contribute in varying degrees to proteins binding in a sequence-specific or non–sequence-specific manner.
Explanation:
Which is the process by which gas exchange between the respiratory system and the blood cells in the cappilaries occurs? transfusion condensation evaporation diffusion
Answer:
Diffusion
Explanation:
Diffusion is the process by which molecules of substances move from regions of higher concentration to regions of lower concentration until equilibrium concentration is attained. This movement of molecules is because a concentration gradient exists between the two regions.
Blood cells in the capillaries is low in oxygen because the cells have used up the oxygen in cellular respiration. However, in the lungs, the oxygen concentration is high due to inspiration of oxygen from the external environment. Therefore, a concentration gradient exists between the lungs and blood cells in the capillaries. Oxygen from the lungs diffuses into the blood cells in the capillaries, and these blood cells are then returned to other parts of the body by the circulatory system. This is a continuous process and is known as gaseous exchange.
Answer:
Diffusion
Explanation:
Are Bacteria (essential/non-essential) to sustaining the EcoSphere?
Examples of ovoviviparous animal
Answer:
sharks, rays, snakes, fishes, and insects
Explanation:
These ovoviviparous animals produce eggs, but instead of laying eggs, eggs develop inside the mother's body. The eggs are laid in the mother. After rocking, they stay in the mother for a while and feed there. Then the young are born live.
Ovoviparity is, therefore, a mixture of oviparous (animals that lay eggs) and viviparous (animals that develop in the mother’s body).
If I were to make hot cocoa which consists of chocolate syrup and milk, identify the solution
a. chocolate syrup
b. milk
c. none of the above
d. hot cocoa
Which pathogen is most likely responsible for causing hoof-and-mouth disease on livestock?
Answer:
D
Explanation:
A virus, because it requires a host cell to reproduce
what is homeostasis?
the body's way of coping of outside factors
the body's ability to heat up and cool down
the body's natural way of maintaining equilibrium or balance
the body's standard heart rate
Answer: C or if there is an E for all the above
Explanation: Homeostasis refers to the body’s ability to maintain a stable internal environment (regulating hormones, body temp., water balance, etc.).
Help please
I’m begging you, due in an hour
Answer:
1 should be D and 2 should be A
What are the major parts of one molecule of ATP? (3 parts)
Answer:
Adenine ,ribose, covalent bonds
Explanation:
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An ATP molecule consists of three parts. One part is a double ring of carbon and nitrogen atoms called adenine. Attached to the adenine molecule is a small five-carbon carbohydrate called ribose. Attached to the ribose molecule are three phosphate units linked together by covalent bonds.
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Part B: Evaluating Results
Question 1
Explain why your model demonstrates how crossing over is important to genetic variation in a species
Answer:
Crossing over is essential for the normal segregation of chromosomes during meiosis. Crossing over also accounts for genetic variation, because due to the swapping of genetic material during crossing over, the chromatids held together by the centromere are no longer identical.
Explanation:
Which of the following statements supports the need for a handler to know an animal’s point of balance? A handler must know an animal’s pattern of movement in order to avoid injury. A handler must know where to stand in order to avoid injury. A handler must know proper feeding procedures in order to avoid injury. A handler must not use a loud voice in order to avoid injury.
Answer:
A handler must know an animal’s pattern of movement in order to avoid injury.
Explanation:
Point of balance refers to equalibrium so if you know the animals pattern of movemenrt you are less likely to get injured while moving on or with it.
Answer:
A
Explanation:
i got it wrong and it showed the correct answer
What components are needed for
photosynthesis?
Answer:
sunlight, carbon dioxide, and water as substrates
Explanation:
Hope this helps :]
Answer:
Explanation:
chicken leg piece and/Photosynthesis is a multi-step process that requires sunlight, carbon dioxide, and water as substrates. It produces oxygen and glyceraldehyde-3-phosphate (G3P or GA3P), simple carbohydrate molecules that are high in energy and can subsequently be converted into glucose, sucrose, or other sugar molecules.
Which statement best describes what happens during translation?
Answer:
B
Explanation:
The entire process is called gene expression. In translation, messenger RNA (mRNA) is decoded in a ribosome, outside the nucleus, to produce a specific amino acid chain, or polypeptide. The polypeptide later folds into an active protein and performs its functions in the cell.
During translation, the ribosome reads the mRNA and uses the information to assemble a protein.
Translation is the second step of protein synthesis. It takes place in the ribosome, a complex structure made up of proteins and RNA. The ribosome reads the mRNA, a molecule that contains the genetic information for a protein. The mRNA is translated into a protein by a process called codon-anticodon pairing.
Codons are three-base sequences in mRNA that code for specific amino acids. Anticodons are complementary sequences in tRNA molecules that bind to specific codons. When the ribosome encounters a codon in the mRNA, it brings in the corresponding tRNA molecule. The tRNA molecule carries the amino acid that corresponds to the codon.
The amino acid is then added to the growing polypeptide chain. The ribosome continues to move down the mRNA, reading codons and adding amino acids until the entire protein is synthesized.
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please help me, i dont like this
Answer:
yes this is true
Explanation:
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