PLSE HELP ILL GIVE BRAINLIST!!!!.​

Answer:

option B) The oxygen end of the molecule has a partial negative charge and the hydrogen end has a partial positive charge.

Justification:

The electronegativity of an element accounts for its relative ability to attract electrons.

Being oxygen more electronegative than hdyrogen (the electronegativity of oxygen is 3.44 while the electronegativity of the hydrogen is 2.20), the electron density will be displaced toward the oxygen, letting it with a partial negative charge and the hydrogen with a partial positive charge.

Finally, since the charge is not symmetrical distributed around a center of the molecule, the molecule ends being polar.

Answer:

which one?

i dont see anyting on the right

Answer:

Explanation:

e

Answer:

Sorry ...

Explanation:

Unfortuntely, you can only answer this question if you've read the book. Those reading this pretty much haven't.

Answer:

ok i go

Explanation:

your experience is so so good and your frofile

Answer:

Polymerase chain reaction (PCR) is used to make many copies of DNA .

hope it is helpful to you.

Answer:

Polymerase chain reaction (PCR) is used to make many copies of DNA .

hope it is helpful to you.

Answer:

xylem and pholem.....?

the hormones secreted by the endocrine glands enter the circulation and are carried throughout the body to act upon target cells located far away from the secreting glands. Thus, endocrine glands are highly vascularized with many small capillaries among the nests of endocrine cells.

Answer:

the hormones secreted by endocrine gland enter the circulation and are carried throughout the body to act apon targeted cells located far away from the secreting gland. that's the reason why endocrine glands are vascularized with small many capillaries amongst the nest of their cells

Answer:

D

Explanation:

Answer:

the citric acid cycle and preparatory steps

Answer:

A.  Danny stores the chemicals required for his experiment in flasks and beakers.

Explanation:

It is unsafe to store chemicals in open containers such as, a flask or beaker.

Answer:

A meteor, before entering earth's atmosphere is known as a meteoroid

Answer: Gram-positive bacteria.

Explanation:

Gram-positive bacteria are those bacteria that stain dark blue or violet by Gram staining. This is due to the structure of the cell envelope, since they possess a cell wall composed of a thick layer of peptidoglycan, which surrounds the previous one. The cell wall is attached to the cytoplasmic membrane by lipoteichoic acid molecules. The peptidoglycan layer confers high resistance to these bacteria and is responsible for retaining the stain during Gram staining. Unlike gram-positive bacteria, gram-negative bacteria have a second lipid membrane outside the cell wall and a single peptidoglycan layer.

An antibiotic is a chemical substance produced by a living being or synthetically derived, which kills or prevents the growth of certain classes of sensitive microorganisms, such as bacteria. An antibiotic could be bacteriostatic if it prevents the growth of bacteria or bactericidal if it destroys them.

Antibiotics usually attack cell walls, such as β-lactams that act on the peptide chains of the bacterial cell wall. That is, they act by inhibiting peptidoglycan synthesis. This is why gram-positive bacteria are susceptible to certain types of antibiotics because they possess a large amount of peptidoglycan.

Answer:

Glycolysis produces pyruvate, ATP, and NADPH by oxidizing glucose. During cellular respiration, glucose combines with oxygen to form carbon dioxide, water, and ATP.

Explanation:

Answer:

C.

Explanation:

Saliva is not excreted by the human body.

Carbon dioxide is excreted by respiration.

Urea is excreted by urine.

Salt is excreted by sweat.

Answer:

the anwer is C. urea is the only one the is not a part of human

Answer:

c    make the data more valid

Explanation:

Answer:

C) Smallest fragment of DNA that traveled the fastest

Explanation:

During this gel electrophoresis, DNA passes through a agarose obstacle course, where the poles opposite to wells are positively charged electrodes. Since DNA is negative in charge, when it is placed in wells and electric current is run, DNA will try to run towards the positive end.

Shorter DNA segments can easily  "wiggle" through the pores of the gel whereas, longer DNA segments need to do more "squeezing" to move down the gel.

Therefore, Band X in this figure is the shorter DNA segment as it move through the lane at a faster rate and reaches very far when compared to longer DNA segments.

Smallest fragment of DNA that traveled the fastest. So, the correct option is (C).

Gel electrophoresis is defined as the technique that is used in laboratories to separate charged molecules such as DNA, RNA and proteins according to their size where the charged molecules move through a gel when an electric current is passed through it.

During gel electrophoresis, the DNA passes through an agarose barrier course, where opposite poles of the wells are positively charged electrodes, so the DNA is negatively charged when it is placed in the wells and an electric current is passed through it. DNA will try to run towards the positive end.

Shorter DNA segments can easily "squeeze" through the pores of the gel, while longer DNA segments require more "squeezing" to move down the gel. Band X in this figure is the short DNA segment as it moves through the lane at a faster rate and reaches much farther than the longer DNA segments.

Thus, smallest fragment of DNA that traveled the fastest. So, the correct option is (C).

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Answer:

D answer is correct

Explanation:

semi circular helps our sense of balance

Answer:

eardrum

Explanation:

The ear is a sensory organ that picks up sound waves, allowing us to hear. It is also essential to our sense of balance: the organ of balance (the vestibular system) is found inside the inner ear. It is made up of three semicircular canals and two otolith organs, known as the utricle and the saccule

Option D is the correct option..

D. The amount of heat required to raise the temperature of 1 g of a

substance by 1°C

Answer:

Populations are influenced by fluctuations in any of the abiotic cycles. The fluctuation of seasonal cycles can cause populations to hibernate, migrate, or breed. Organisms hibernate as a result of seasonal fluctuations that cause them to have a limited resource supply.

Answer:

the average percentage of energy lost as heat

Explanation:

An energy pyramid (also called trophic pyramid) is a graphical representation that exhibits how energy flows at each trophic level in a particular ecosystem. In an energy pyramid, it is possible to determine how much energy is available at each trophic level and how energy flows from producers (e.g., photosynthetic plants) to primary consumers (e.g., herbivores), then from primary consumers to the next trophic level (e.g., carnivores), and so successively to all major trophic groups (e.g., higher carnivores). During this chain, energy is lost as heat when it is transferred to the next level, and the average percentage of energy lost increases at each trophic level, thereby less and less energy is available to major trophic groups.

Drug resistance only arises from an organism gaining the genetic information for the resistance from another organism.

Answer: True

Maybe, mosquitoes lay eggs in still water like a in pail or bucket

Answer:

A. The adaptations they possess for hunting and eating  make them look intimidating.

Explanation:

Some species of predators appear  intimidating because of the adaptations they possess for hunting and eating  make them look intimidating and fearful. The appearance of some predators make them intimidating which make the prey full of fear. For example, Lion is intimidating other animals especially its prey due to its attitude as well as physical appearance such as big sharp teeth and paws etc.

Having more samples gave him results that were closer to the predicted ratios.Mendel's experiments involved studying the inheritance of traits in pea plants. By carefully crossing different varieties of pea plants and observing the traits of their offspring, he was able to formulate the laws of inheritance that are still used today.

Mendel's experiments involved observing the inheritance of traits in pea plants, which were controlled by genes.

By studying a large sample size of 28,000 pea plants, he was able to obtain data that was much more reliable and accurate. This is because the larger the sample size, the closer the results will be to the expected outcomes or predicted ratios, and any anomalies or errors would be minimized.

This is an important principle in statistics and scientific research, and it helps to ensure the validity and generalizability of the findings.

Additionally, by using such a large number of plants, Mendel was able to minimize the impact of any outliers or anomalous results that might have occurred in a smaller sample. This helped to ensure that his results were as accurate and reliable as possible.

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Answer:

The correct answer is - the difference in altitudes.

Explanation:

The hemoglobin in the person of Denver who lives at a higher altitude than the person who lives in Philadelphia will be much higher. This is due to the fact that at higher elevation or altitude atmospheric pressure decreases that causes hemoglobin to stick to the RBCs and that results in less oxygen level in the body.

To compensate for this low level of oxygen levels hemoglobin content need to be higher in people living at a higher elevation.

Answer:

Erythrocytes low in BPG does not unload O2 very well.

Answer:

Gene therapy replaces a faulty gene or adds a new gene in an attempt to cure disease or improve your body's ability to fight disease. Gene therapy holds promise for treating a wide range of diseases, such as cancer, cystic fibrosis, heart disease, diabetes, hemophilia and AIDS.