Answer:
A
Explanation:
bacteria does respiration using dissolved oxygen in water, therefore concentration of dissolved oxygen present in water is reduced making fish unable to perform respiration hence they will die.
2. (b) Why is it important to maintain genetic diversity in populations?
Genetic diversity encourages the health of a species and provides material resources such as plants. The loss of genetic diversity leads to reduced options for mates which means even more loss of a species and the species becomes more susceptible to disease. These are very few results that occur with the loss of genetic diversity.
Argue whether flying is an innate or a learned behavior for birds.
What is the one part of the food chain that no one likes to talk about?
Answer:
Plants or decomposers.
Why must cytosine bind to guanine, while thymine bonds to adenine?
a
These are Chargaff's rules.
b
Like bonds with like.
c
Two-ring molecules (adenine and guanine) must bind with one-ring molecules (thymine and guanine) to keep the distance between DNA chains consistent.
d
This will not happen, as it violates Chargaff's rules.
These are Chargaff's rules that is why cytosine bind to guanine, while thymine bonds to adenine. Thus, the correct option is A.
What is Chargaff's rule?According to the rule, in DNA there is always equality in quantity between the bases A and T and between the bases G and C. (A is adenine, T is thymine, G is guanine, and C is cytosine).
According to Chargaff's rule, Concentration of adenine = concentration of thymine. therefore if [A]=40% then the [T] will also be 40%.
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The study of the interactions between drugs and their receptors and the series of events that result in a pharmacologic response is called
Answer:
Pharmacodynamics (PD) is the study of the biochemical and physiologic effects of drugs (especially pharmaceutical drugs
what is the function of a chromosome?
what is produced by the process of meiosis
Answer:
meiosis produces reproductive cells - egg and sperm cells
A biologist sequences the DNA of two different organisms and identifies these two sequences:
Sequence 1: GTACCACATCGAAGGGTC
Sequence 2: GTACGACACCGAAAGTTC
What conclusion can the biologist draw about the two organisms based on the DNA fingerprinting?
A.They are closely related but different species.
B.They are the same species.
C. One organism evolved from the other.
D. They are not related at all.
The two DNA sequences of organisms represent that they are closely related but different species.
What do you mean by Species?Species may be characterized as a group of organisms that can reproduce naturally with one another and produce fertile offspring.
DNA fingerprinting is a technology that reveals the similarity between the DNA sequences of two or more organisms of the same or different species.
Both the sequence are very similar to one another, only a few bases are altered which signifies that they are closely related but belongs to different species.
Therefore, the two DNA sequences of organisms represent that they are closely related but different species.
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Typical gram-negative bacteria are more impervious to the action of antimicrobial chemicals than are gram-positives because gram-negatives have a(n)
As gram-negative bacteria have an extra layer of cell wall therefore it is less sensitive towards antimicrobial chemicals than gram-positive bacteria.
Why gram-positives are less impervious to the action of antimicrobial chemicals?Gram-positive bacterial cell wall is made up of only the peptidoglycan layer and it does not have an extra barrier that protects it from some antimicrobial chemicals.
Gram-negative bacteria have two layers of cell wall peptidoglycan layer and a lipopolysaccharide layer.
Thus, gram-negative bacteria have an extra layer of cell wall.
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According to the cladogram, which group of organisms is the closest relative to chordates?.
Answer:
Echinoderms.... ANSWER AFTER THAT is C
Explanation:
peace and love
2. Describe the role of the following in maintaining a constant body temperature in humans:
(b) The muscles:
Answer:
Muscles can also receive messages from the brain when the body temperature decreases. They respond by shivering. Shivering causes the muscles to contract and relax quickly. This process generates heat.
HELP ME ASAP PLEASE ANSWER
Four o’clock flowers can be red (RR), white (rr), or pink (Rr). If a pink flower and red flower are crossed, what will be the phenotypic ratio?
100% pink
50% red, 50% pink
100% Rr
50% RR, 50% Rr
Rewrite what's noted
Red(RR)white(rr)Pink(Rr)As pink and red are crossed white is out of business.
So
Share will be halved
50% pink :50% red50% Rr:50% RROption D
Explain two ways in which the alveoli are adapted to increase the efficiency of gas exchange
Answer:
Adaptations of the alveoli:
Moist walls - gases dissolve in the moisture helping them to pass across the gas exchange surface. Permeable walls - allow gases to pass through. Extensive blood supply - ensuring oxygen rich blood is taken away from the lungs and carbon dioxide rich blood is taken to the lungs.
I’m general how many human activities influence the carbon cycle
Explanation:
Factories, cars, oil producers, woodcutting, building houses, and even building new roads makes the carbon cycle harder to go through.
What is the function of the placenta?
It covers the cervix.
It protects the vagina.
It nourishes the embryo.
It fertilizes an egg.
Answer: It nourishes the embryo.
Explanation:
The placenta's main purpose is to nourish the embryo. It helps to provide oxygen and nutrients to the embryo. The placenta is an organ that develops during pregnancy.
Which substances are needed to make food in plants?.
Answer:
To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight. for photosynthesis. Carbon dioxide enters through tiny holes in a plant's leaves, flowers, branches, stems, and roots. Plants also require water to make their food.
Explanation:
Place each description in the correct category.
represented by symbols
made of one type of atom
represented by formulas
cannot be broken down
can be chemically broken down
made of two or more types of atoms
Elements
Compounds
Answer:
The elements will break down into moister, h20
Explanation:
Prenatal development begins with ______ and ends with ______. Multiple choice question. organogenesis; ovulation fertilization; birth ovulation; fertilization birth; death
How does the number of chromosomes in a human liver cell compare to the number of chromosomes in a human brain cell?
a
The number of chromosomes in both cells is equal.
b
The liver cell has fewer chromosomes than the brain cell.
c
The liver cell has more chromosomes than the brain cell.
d
The number of chromosomes in each cell type varies between individuals.
Answer:
A
Explanation:
All organs in the human body have the same number of chromosomes.
40. during the song oh i just can't wait to be king" the crocodile has birds in its mouth. this is a
symbiotic relationship. what type of symbiotic relationship is it?
describe three scenes from the movie that show the following scavenger behaviors.
The name of the movie is 'The Lion King' and the missing scene here is the song "I Just Can't Wait to Be King" written by Elton John.
A crocodile that has birds in its mouth represents a type of parasitism, whereas scavenger behaviors include:
bearshyenas piranhasWhat is parasitism?Parasitism is a class of symbiotic relationships in which one species is benefited from such interaction and the other species is harmed.
In this case, when the crocodile needs to clean its tooths, it opens its mouth to allow the arrival of birds.
Moreover, scavengers are organisms that eat dead biomass (e.g. dead animals or rotting plants).
In conclusion, although the movie is NOT found here, a crocodile that has birds in its mouth represents a type of parasitism, whereas animals having scavenger behaviors include bears, hyenas and piranhas.
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Most of the carbon in the carbon cycle exists as carbon dioxide in…
A. fossils.
B. the oceans.
C. the atmosphere.
D. nucleic acids.
Answer:
C.
Explanation:
(C).the atmoshphere
William used a hammer to pound a nail into a wooden board. When the nail
was about halfway through the board, he stopped and turned the board upside
down. The nail stayed in place in the board. Which of the following acts on the
nail to keep it in place in the board?
F. friction
G. gravity
H. magnetism
I. weight
What is a fact? quoted information provable information estimated information repeated information
The answer is provable information
Edge 2022
The fact is provable information, thus option "B" is correct.
What is Quantitative data?Quantitative data refers to the type of data which provides numerical information. Quantitative data includes the statistical techniques. For example, quantitative data can be used to drive the result of satisfaction survey of customers of using a product. The customer rate their satisfaction survey on a scale of 1-5 and hence statistical technique would be required to draw numerical conclusion.
The fact is provable information, thus option "B" is correct.
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4. Explain why nuclear radiation can be used to preserve food.
Answer:
The radiation destroys food-borne bacteria. Radiation is measured in units called rads. The FDA allows exposure of up to 100,000 rads for already approved foods. At this level, gamma rays penetrate the food and kill bacteria and other infectious organisms by preventing the organisms from dividing and growing
Explanation:
What is the original starting color for Glucose indicator?
Answer:
If adding Benedict's reagent in the glucose solution and then heating it, the solution changes gradually from blue to dark orange. That is, colors change in the order of blue-green-yellow-dark orange according to the concentration of glucose.
The study of normal tissues, or groups of cells and their surrounding extracellular materials, is called:.
Answer:
the study of tissues, or groups of cells and their surrounding extracellular materials, is called Histology.
What is the net result of one glucose molecule going through the krebs cycle.
Answer:
Recall that glycolysis, stage I of cellular respiration, produces two molecules of pyruvate. These molecules enter the matrix of a mitochondrion, where they start the Krebs cycle.
Two molecules of pyruvate are produced during the first stage of cellular respiration, glycolysis. These substances enter a mitochondrion's matrix, where they initiate the Krebs cycle.
Thus, A little quantity of ATP (adenosine triphosphate) is produced by the Krebs cycle through substrate-level phosphorylation. Two ATP molecules are directly created in the Krebs cycle for every glucose molecule.
Electron transport chain (ETC): The Krebs cycle also generates high-energy electron carriers called NADH (nicotinamide adenine dinucleotide) and (flavin adenine dinucleotide), which transport the electrons to the ETC for additional ATP generation.
Carbon dioxide is generated as a waste product during the Krebs cycle's breakdown of glucose. Six CO2 molecules are produced overall for every molecule of glucose.
Thus, Two molecules of pyruvate are produced during the first stage of cellular respiration, glycolysis. These substances enter a mitochondrion's matrix, where they initiate the Krebs cycle.
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Four o’clock flowers can be red (RR), white (rr), or pink (Rr). If a pink flower and red flower are crossed, what will be the phenotypic ratio?
Answer:
(RR)
Explanation:
Red dominates.
Review the following DNA sequences:
Original DNA Sequence: G G C C G T T T C A C C
Mutated DNA Sequence: G G C C G T T A C A C C
Which type of mutation has occurred?
Answer:
Substitution
Explanation:
Original DNA Sequence Protein 'T' in the mutated DNA sequence has been replaced (Substituted) by 'A'.
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1. Why is most food digested?
A. Digestive enzymes require a variety of substrates.
B. It ensures that the diet is balanced.
C. Most ingested food molecules are large.
D. To prevent disorders of the intestine.
1. Why is most food digested?
C. Most ingested food molecules are large.
Food is digested to break down big particles of food into smaller ones so that the absorption process takes place more efficiently.
Answer:
C
Explanation:
As food molecules are very large during intake, they cannot be absorbed by the small intestine as macromolecules. They need to broken down into smaller molecules for absorption to take place.