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20 points)
A.
Neon, because it has two energy levels with eight electrons in the second level
B.
Chlorine, because it has three energy levels with seven electrons in the third level
C.
Gallium, because it has four energy levels with three electrons in the fourth level
D.
Tin, because it has five energy levels with four electrons in the fifth level

Answer:

When do new species develop?

New species develop after fertilization has occurred which brought about a new organism or specie callled a zygote. Such new species inherit traits from parents

Explanation:

Answer:

Opioid pain killers block synaptic transmission of nerve impulses by binding to opioid receptors.

Explanation:

     3. Adjuvant pain killers are used to treat neuropathic pain i.e. pain due to injury of the nervous system.

stigma style ovary

ok make me brainest

Answer:

Stigma, style, and ovary

Explanation:

These are the 3 components of a carpel!

-I took the course :)

Example is conversion of NAD+ to NADH+ is an example of reduced in metabolism.

Explanation:

Oxidation and reduction or redox reaction means transfer of electron from one atom to another in a compound.

In photosynthesis and respiration redox reaction are seen.

The substance that gain the electrons in  metabolic reaction is said to be reduced.

In respiration process oxygen is being reduced. The NAD+ accepts hydrogen ion  and 2 e- to become NADH+H+. These are electron carriers.

The reactions can be seen in glycolysis, Kreb's cycle.

a. alkaptonuria appears to be caused by a recessive allele.

b. Ann's genotype is homozygous recessive (aa), meaning she inherited two copies of the recessive allele for alkaptonuria from her carrier parents.

a. Based on the pedigree, alkaptonuria appears to be caused by a recessive allele. This is because affected individuals are represented by colored circles and squares, indicating that they have the disorder. In a recessive inheritance pattern, individuals need to inherit two copies of the recessive allele (one from each parent) in order to have the disorder. If the disorder was caused by a dominant allele, only one copy of the allele would be needed for an individual to be affected.

b. To determine Ann's genotype, we need to analyze the information provided in the pedigree. Ann is represented by a colored square, indicating that she is affected by alkaptonuria. Since alkaptonuria is caused by a recessive allele, Ann must have inherited two copies of the recessive allele (one from each parent) in order to be affected.

Since Ann's parents are not affected (unaffected individuals are represented by empty circles and squares), they must be carriers of the recessive allele. A carrier is an individual who has one copy of the recessive allele but does not show any symptoms of the disorder. When two carriers have a child, there is a 25% chance for the child to be unaffected, a 50% chance for the child to be a carrier, and a 25% chance for the child to be affected.

Therefore, Ann's genotype is homozygous recessive (aa), meaning she inherited two copies of the recessive allele for alkaptonuria from her carrier parents.

The calcium present in the milk acts as a fertilizer, for the growth of pumpkin size.

Explanation:

Scientific answer: Milk contains nutrients, minerals mainly calcium which are good for the growth of the plant as a fertilizer.

Milk gets readily absorbed by the roots due to the solubility of nutrients in milk.

The root hairs of the plant transport the calcium to the other parts like stem.

This will only help when all other factors of plant growth are present as sunlight, water other than fertilizer.

Non-scientific question:

The Hypothesis here is those pumpkin plant fed with milk are bigger on size.

Also injecting stems with milk would cause no good.

Pumpkin plants fed with milk and some plants fed with water are compared, we get the result that giant pumpkins are one that are fed with milk. This is  statistical analysis.

To apply the scientific method to the question of pumpkin growth with milk, one would form a hypothesis based on research, conduct an experiment with controlled variables, collect and analyze data, then draw a conclusion. A scientific question could ask about the effect of milk's calcium on pumpkin growth, while a nonscientific question might inquire about taste preferences for such pumpkins.

Using the scientific method to determine if pumpkins grow bigger when fed milk would involve several steps. First, an observation must be made, which in this case, might stem from the anecdotal evidence that soil enriched with milk could enhance plant growth. This leads to the question: "Do pumpkins grow bigger when fed with milk compared to water?" A thorough literature review should be conducted to see if previous research can inform the hypothesis.

Next, a hypothesis is formed, which is an educated guess based on the research. For example, the hypothesis could be "Pumpkins fed with milk will grow larger than those fed with water due to the additional nutrients found in milk." We then make a prediction that is testable through experimentation, such as "If pumpkins are fed milk over a growing season, they will gain more mass compared to those fed just water."

Sheep would then be cared for in a controlled way for a period of time, with one group receiving milk as a part of their feeding regimen and another group only receiving water. Data on pumpkin size, weight, and overall health could be collected throughout the growing period.

Once the data is collected, it is analyzed statistically to determine if there is a significant difference between the two groups. Finally, a conclusion is drawn, which either supports or refutes the hypothesis, leading to further questions and research in a cyclical pattern of scientific investigation.

A scientific question related to this experiment could be "Does the calcium content in milk contribute to the increased growth of pumpkins?" A nonscientific question could be "Do people prefer the taste of pumpkins that have been fed milk?" The former relates to measurable scientific phenomena while the latter relates to subjective personal preference.

Answer: you and maam

Explanation:

it doesnt say the names

Answer:

option C, nothign to do here

Phylogenetic tree enriches our understanding of how genes, genomes, species (and molecular sequences more generally) evolve.

Explanation:

A phylogeny, or developmental tree, speaks to the transformative connections among a lot of life forms or gatherings of living beings, called taxa (particular: taxon). A phylogenetic tree can help follow an animal groups back through transformative history, down the parts of the tree, and find their normal family en route.

The foundation of a phylogenetic tree shows that a tribal heredity offered ascend to all life forms on the tree. A branch point demonstrates were two genealogies separated. A genealogy that advanced early and stays unbranched is a basal taxon. At the point when two heredities come from a similar branch point, they are sister taxa.

Explanation:

PLANT-LIKE:

presence of flagella

shows absence of cell wall, though chloroplast may be present

ANIMAL-LIKE:

slime mold belongs in this category

absence of cell wall, as well as chloroplast

FUNGUS-LIKE:

feeds on decaying matter enclosed by a membrane called a pellicle.

Answer:

The factors on which the gaseous exchange depends are:

Surface Area Of The Membrane: The larger the surface area of a membrane, the more will be the gaseous exchange. Hence, surface area is directly proportional to the rate of gaseous exchange.

Thickness of the membrane: The more thick the membrane will be, the lesser the amount of gases will be able to diffuse through it. Hence, gaseous exchange and thickness of a membrane are inversely proportional.

The Distance Of Diffusion: The distance across which air and blood have to travel to diffuse also determines the rate of gaseous exchange

The experiment would give the same results. The conclusion would not be changed from the original experiment.

Explanation:

The alleles for the purple colour flower in Mendelian pea plant is Pp

This means this is a heterozygous dominant in nature.

Pp and Pp are the heterozygous plants with purple colour to be crossed.

  Punnett square, F1 generation

     P     p

P   PP  Pp

p    Pp   pp

3 purple one white

ie 3/4 th purple and 1/4 white flower

Phenotypic ratio 3:1

genotype ratio  1:2:1

The phenotype ratio shows only one white flower in the first generation.

Answer:

The experiment would result in a plant with either purple or white flowers. The conclusion would depend on this single result and would not be accurate.

The name given to energy stored in food is called calorie.

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Answer:

three risks that are associated with genetically engineered plants?

Three risks involved in genetically engineered plants include;

Resistance

Mutation

Explanation:

Over time plants resist genetically engineered process as a result of exposure to such measure over time which enable such plant to develop resistance over time and pass the traits to their offspring.

Answer:

Twice a day, variations in the Moon's gravitational pull interact with the Earth's gravity and rotation to make tides rise and fall along coastlines and near the mouths of rivers. The kinetic energy in the moving water can be captures and converted into a usable form of energy and water flows through turbines.

Explanation:

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d) AA;BB;cc;dd genotypes will be rarest to observe among the progeny.

Explanation:

Let us cross the given alleles of the gene

Aa X AA                   Bb X Bb       Cc X cc       Dd X Dd

   A  a                         B    b             C   c             D  d      

A AA  Aa                 B BB Bb         c Cc  cc       D  DD  Dd

A  AA  Aa                 b Bb  bb         c  Cc   cc     d Dd   dd

From the above results of crosses, it can be concluded which of the genotypes is rarest among the progeny. The genotype ratios in:

In the first case it can be both as they are in the ratio of 2:2

In the second case 1:2:1

in the third case  2:2

in the fourth case 1:2:1

So least occurring genotypes are

AA;BB;cc;dd

AA;BB;cc;dd genotypes will be the rarest to observe among the progeny

d. AA;BB;cc;dd

Explanation:

AaBbCcDd X AABbccDd

Aa X AA - AA, AA, Aa, Aa - Genotypic ratio = 1:1

Bb X Bb - BB, Bb, Bb, bb - Genotypic ratio = 1:2:1

Cc X cc - Cc, Cc, cc, cc - Genotypic ratio = 1:1

Dd X Dd - DD, Dd, Dd, dd - Genotypic ratio = 1:2:1

We can see that the heterozygous combinations occur more in number.

Whereas, Homozygous recessive appears the least.

Therefore, the rarest to observe among the proge is AABBccdd as is has two recessive combination.

Answer:

C

Explanation:

The velocity of wind is the magnitude and direction so it definitely influences the waves. Temperature does based on molecular energy increasing as the temperature increases. Since direction is part of velocity, it gives that answer away.

Explanation:

Chloroplasts are cell organelles that conduct photosynthesis.

The photosynthetic pigment known as chlorophyll present in chloroplast captures the energy from sunlight.

and convert it into ATP and NADPH and free oxygen from water in plants.

Almonds come under the category of Angiosperm.

Angiosperms, are flowering plants.

They contains seeds that are enclosed within an ovary which is usually a fruit.

Final answer:

Natural selection occurs when there is a variation of traits, the heritability of these traits, competition for limited resources, and differential survival and reproduction (fitness) which leads to evolutionary changes in a population.

Explanation:

To understand Darwin's theory of natural selection and what must be occurring in a population for it to take place, we must consider Darwin's four postulates. These factors are essential for the mechanism of evolution through natural selection.

These principles form the basis of Darwin's theory of natural selection, illustrating how populations change over time and how new species can evolve.

Answer:

B strand 2 is smaller than strand 3

Explanation:

Answer:

B

Explanation:

I just took the quiz

Answer:Mitosis is the the process of cell division that allows for growth and repair of damaged tissue.

Explanation:

Mitosis is the process of cell division that enables growth and repair of damaged tissue. It results in the production of identical daughter cells, assisting in tissue maintenance and healing.

The process of cell division that allows for growth and repair of damaged tissue is called mitosis. Mitosis involves a single cell dividing to produce two identical, daughter cells with the same number of chromosomes as the parent cell. This is crucial for body tissue growth, maintenance, and repair. For instance, after a cut on the skin, cells surrounding the area undergo mitosis to replace the damaged ones and heal the wound. Therefore, mitosis is a pivotal process in an organism's life.

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Answer:

B) compression

Explanation:

First of all, we must highlight that the question above refers to a sound wave. Sound waves are longitudinal waves, because they have the ability to propagate through the air, as the sound takes over the environment. This spread creates regions known as compression and rarefaction. The rarefaction presents a greater space between the movement of the wave, where the air can interfere, since the compression allows the sound waves to be closer together, with little air interference (we can see this in the figure above, in the shaded part where the waves are present very close to each other). Wave compression has the ability to propagate within solid materials, allowing a vibration to be created that is picked up by our ear.

Answer:

B) Compression

Answer:

The true answers are (A), (C) and (D).

Explanation:

Answer: 1). Lungs

2). Heart.

Explanation:

Even though the options were not provided, generally all arteries carry oxygenated blood except the pulmonary artery while all veins carry deoxygenated blood except pulmonary vein.

Pulmonary artery and veins are responsible for pulmonary circulation. Pulmonary circulation involves the transport of deoxygenated blood from the heart to the lungs by the pulmonary artery where the carbon dioxide is removed and the blood gets oxygenated; and the transport of the oxygenated blood from the lungs to the heart by the pulmonary veins from where they are being carried by other arteries to other parts of the body.

Pulmonary artery carries deoxygenated blood from the right ventricle of the heart to the lungs where the carbon dioxide entrapped in the deoxygenated blood is offloaded and oxygen is loaded in the blood, thereby causing the blood to become oxygenated.

Pulmonary vein then carries the oxygenated blood from the lungs into the left ventricle of the heart, from where it is supplied to other parts of the body through other arteries.

Therefore, a defect in pulmonary artery will result in short supply of deoxygenated blood to the lungs while a defect in pulmonary vein will lead to shortage of oxygenated blood in the heart.

Answer:

Plato: Lungs, Heart

Aneuploidy is the condition that occurs when daughter cells are formed with unequal or abnormal number of chromosomes after mitosis and cell division.

Explanation:

Aneuploidy occurs when homologous chromosomes fail to segregate or rearrange leading to chromosomal nondisjunction. This condition leads to genetic mutations, giving rise to abnormal number chromosomes in the daughter cells, where (2n+1) or (2n-1) haploid daughter cells are formed instead of 2n chromosomes.

Trisomy is the aneuploidic condition caused when there is a third chromosomal (2n+1) copy instead of two copies, which has occurred in the given case leading to formation of daughter cells with 39 chromosomes instead of 38.

Aneuploidy disrupts cell function and can lead to organ malformation as in Down's syndrome, cell multiplication leading to cancers, etc due to disturbance of protein homeostasis.

Answer:

Ribosomes  2

Explanation:

Answer:

2

Explanation:

got it right on my test.

Answer:

condensation and evaporation

Explanation:

Change of state is a factor in the processes of condensation and evaporation. Evaporation refers to the transition of a substance from a liquid to a gas. Condensation describes the transition from a gas to a liquid form. They occur when molecules receive or lose energy. Heat is a form of this energy.

The Troposphere, extending up to 12 km above sea level and encompassing about 80% of the Earth's atmosphere, is directly influenced by Earth's surface conditions. This is because it generates weather events due to convection currents formed by the heated air rising from Earth's surface and cooler air descending, which equally affects the wind and cloud formations in this layer.

The layer of the atmosphere most strongly affected by the conditions on the Earth's surface is the Troposphere, option B. The troposphere extends up to 12 km above sea level and contains nearly 80% of the Earth's atmosphere by mass. It is the layer where most weather events originate owing to the hot air rising from the Earth's surface and colder air descending. Hence, conditions on Earth's surface predominantly influence this layer of the atmosphere.

For example, the convection currents in the troposphere are directly impacted by the heating of the Earth's surface, generating wind and cloud formations. This dynamic nature of the troposphere is the reason for its direct susceptibility to the surface conditions of the Earth.

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The troposphere is the layer most strongly affected by conditions on Earth's surface. So option (b) is correct.

The troposphere is the layer of the Earth's atmosphere closest to its surface, extending from the surface up to about 10-15 kilometers (6-9 miles) high.

It is where weather occurs and where most of Earth's clouds and precipitation are found. The conditions in the troposphere, such as temperature, humidity, and air pressure, are directly influenced by conditions on Earth's surface.

For example, during the day, the surface heats up, causing air near the surface to warm and rise, leading to convection currents and the formation of clouds and storms. At night, the surface cools, causing the air to sink, which can result in calm and clear conditions.

Therefore, the troposphere is the layer most strongly affected by conditions on Earth's surface. Other layers like the stratosphere, mesosphere, and thermosphere are less directly influenced by surface conditions.

Answer:

An operon consists of a group of genes which are controlled by a single promoter.

The lac operon present in the E.coli comprises of genes for making proteins which  breakdown lactose into glucose.

Normally, the lac operon will be turned of by a repressor when there is not enough lactose present.

When lactose is present in the cell, the operon is activated when lacl forms a bond with the promoter region due to its changes in the structure. This causes the process of transcription to occur.

Answer:

When iodine and starch are dissolved together in water, gooey starch molecules instantly trap iodine ions close together to create a dark, blueish-black color. (Dripping liquid iodine onto a potato will turn it the same color, due to all of the spud's starch.)

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