what is directional selection

Answer:

maybe cab If it's wrong I'm so sorry

Answer: D. (Mosses and trees are both plants.)

Explanation: Since mosses are non-vascular plants and trees are vascular plants, and mosses and trees are both not seed plants, mosses and trees are both plants. (Hope this helps! :D)

Answer:

Sorry about that

Explanation:

Answer:

5730 years

Explanation:

In a chemical reaction, including radioactive decay, the half-life of a species is the time taken for the substance to decrease to exactly one-half its initial value.

For a first-order reaction, the half-life of the reactant is

                                                  [tex]t_{\frac{1}{2}} \ = \ \displaystyle\frac{\ln 2}{\lambda} \ \ \ \ \ \ (1)[/tex],

where λ is the reaction's rate constant modeled by the differential equation describing the kinetics of a first-order reaction

                                               [tex]N \ = \ N_{0}e^{-\lambda t} \ \ \ \ \ (2)[/tex],

where N is the remaining amount of substance after time t and [tex]N_{0}[/tex] is the initial amount of substance before the chemical reaction proceeds.

Since the value of λ is constant, rearrange equation (1) with λ as the subject,

                                                       [tex]\lambda \ = \ \displaystyle\frac{\ln 2}{t_{\frac{1}{2}}}[/tex].

Given that only 12.5% of carbon-14 remained after 17190 years assuming that initially there was 100% of carbon -14, substitute in the values into equation (2) and solve for λ (make λ the subject of the equation),

                               [tex]\-\hspace{0.56cm}12.5 \ = \ 100e^{-\lambda \times 17190} \\ \\ \-\hspace{0.5cm} \displaystyle\frac{12.5}{100} \ = \ e^{-17190\lambda} \\ \\ \displaystyle\frac{\ln\displaystyle(\frac{1}{8})}{-17190} \ = \ \lambda \\ \\ \-\hspace{1.05cm} \lambda \ = \ \displaystyle\frac{3\ln2}{17910} \ \ \ \ \ \ \ \ \ \ (\ln \displaystyle\frac{1}{x} \ = \ -\ln x\ ; \ \ln x^{n} \ = \ n\ln x )[/tex]

Equate both λ,

                                            [tex]\displaystyle\frac{\ln 2}{t_{\frac{1}{2}}} \ = \ \displaystyle\frac{3\ln2}{17190} \\ \\ \-\hspace{0.26cm} t_{\frac{1}{2}} \ = \ \ln 2 \ \times \ \displaystyle\frac{17190}{3\ln2} \\ \\ \-\hspace{0.26cm} t_{\frac{1}{2}} \ = \ \displaystyle\frac{17190}{3} \\ \\ \-\hspace{0.26cm} t_{\frac{1}{2}} \ = \ 5730[/tex]

*Note that the above calculations demonstrated that carbon-14 went through 3 half-lives to yield a remaining 12.5% of its original amount, since

                                 [tex]100\% \ \overset{t_{\frac{1}{2}}}\longrightarrow \ 50\% \ \overset{t_{\frac{1}{2}}}\longrightarrow \ 25\% \overset{t_{\frac{1}{2}}}\longrightarrow \ 12.5\%[/tex].

Therefore, if n is the time taken for carbon-14 to half its initial amount trice to remain 12.5% of its initial amount. Then, the half-life of carbon-14 is [tex]\displaystyle\frac{n}{3}[/tex].

Answer:

habitat

Explanation:

The ecological levels do not describe interacting biotic and abiotic factors in an area's habitat. The correct option is D.

A habitat is a place where physical or biotic factors are presented. This is a place where all the factors are present to live a species with all suitable conditions.

Habitat of different species is different. They live in their suitable habitat to grow and reproduce accordingly. If a species is moved from its habitat, then it may have difficulties in surviving.

So habitat is not a place where all biotic and species abiotic factors are present, it is a place where all living factors are present that are necessary for the living of a person. So, it is not the ecological level of  interacting biotic and abiotic factors in an area

Thus, the correct option is D. Habitat.

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Answer:

A

Explanation:

not 100% sure but it seems to be the only sensible answer

Answer:

They absorb the food molecules that result from the external digestion.

Explanation:

Answer:

D.

Explanation:

A lack of trees, a lack of biodiversity, and extreme circumstances are what most clearly identify the tundra.

The polar ice caps and the boreal woodlands (also known as taiga), it is located. Extremely low temperatures and barren, icy terrain define the tundra biome. The arctic tundra and the alpine tundra are the two different forms of tundra.

The Tundra Biome: The Ice Deserts of the World. The tundra is the coldest biome, with an average annual temperature of less than 5°C and yearly precipitation of less than 100 mm, most of it snow.

Only a few number of plants and animals can even thrive on the tundra due to its extreme weather conditions. The Finnish term "tunturia" is where the word "tundra" originates.

Therefore, a lack of trees, a lack of biodiversity, and extreme circumstances are what most clearly identify the tundra.

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Yes The two peptides will separate from each other in an electric field when the pH is 7.0

The two peptides wil drift/separate from each other when the pH is 7.0 because of the reaction of trypsin enzyme and also the difference in charge between HbA and Hbs

Considering charge of each peptide

Since The isoelectric point of normal Hba is 6.9 and Hbs possess two fewer negative charges per hemoglobin molecules

The Hbs is more hydrophobicity than HbA due to the substitution of glutamic acids of HbS by valine residue.

Considering Electrophoresis

At a lower pH level Hbs shows a slower moving band than Hba

while a higher pH level the HbS peptide is less negatively charged while the carboxyl group of HbA is more negatively charged and Hba moves faster as well as an acidic pH.

Hence we can conclude that the two peptides will separate from each other in an electric field when the pH is 7.0

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Answer:

I think it's either mutase or dehydrogenase, but I'm not exactly sure why. I haven't taken a chemistry class yet, so I don't know too much about it TBH.

Answer:

pH is a measure of the concentration of H3O+ ions in a solution. Adding an acid increases the concentration of H3O+ ions in the solution. ... If an acid is added to a basic solution, the solution becomes less basic and moves toward the middle of the pH scale. This is called neutralizing the base.

Answer:

1) anguilliformes

2)sphenisciformes

Answer:

oil

Explanation:

Since oil is a type of fats but in our body we call it lipid

Answer:

organic selection

Explanation:

A mistake in the process of mitosis leads to the development of the daughter cells having chromosomes without segregation.

A cell undergoes cell division by replicating its chromosomes, segregating chromosomes, and creating two identical nuclei during the mitotic phase. The cell organelles are divided equally between two daughter cells with the same set of genomes after mitosis.

Prophase, prometaphase, metaphase, anaphase, and telophase are the main four stages. Meiosis creates cells that are genetically distinct from the parent and have half as much DNA as mitosis, which divides a single "parent" cell into two genetically identical cells.

Therefore, mitosis is a process used in the somatic cells whereas miosis is in fertilization.

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Ansew heheheheheheh

Explanation:

Answer:

D

Explanation:

as only one phosphate is removed hence the name ADP which stands for adenineDIphosphate. Hope this make sense :)

Answer:

Arctic, Antarctic, and Alpine

Arctic, Antarctic, and alpine

Answer:

In recent years, the concept of the circular economy and related policies have tackled resource use, production, consumption and waste at a high level.

Explanation:

hope it helps a lil

Answer:carbon cycle

Explanation:

Answer:

it would be stored in plants in animals

Explanation:

those are one of our main sources of oxygen

If mitosis DID NOT happen... the organism would stay as a single cell. The life we know it now... wouldn't exist as we have multi-cellular stuff.

The cell shrinks because of the movement of water away from the cell into the more concentrated salt solution.

Osmosis is the movement of water from one region to another through a semi - permeable membrane. A hypertonic solution contains more solute than the cell.

In this case, the external salt solution is hypertonic because it contains a 8% salt concentration whereas the cell contains only a 0.9% salt concentration. As such, water moves out of the cell into the solution.

The cell shrinks because of the movement of water away from the cell into the more concentrated salt solution.

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The group of macromolecules that can be affected by Keto's eating choices, and is used for long-term storage, in addition to being insoluble in water, is lipid.

The ketogenic diet consists of significantly reducing the amount of carbohydrates ingested daily and adding more fat to the diet.

After about three weeks of reducing carbohydrates from the diet, the body enters a metabolic state called ketosis, turning stored fat as the body's energy source.

Therefore, the ketogenic diet can bring benefits to the individual, such as accelerated weight loss and prolonged satiety, but it can also be a difficult diet to follow for long periods, as it is more restrictive.

The ideal, then, is always to seek specialized help when you want to achieve some aesthetic or health goal related to weight loss, so that the professional can develop a diet focused on the needs and individualities of each one.

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Answer: In order:

1. Ingestion

2. Decomposition

3. Fossilization

4. Combustion

Explanation:

Answer:

The greenhouse effect increases temperature, putting the natural instinct to hibernate on hold. Mating seasons rely on warming and cooling trends, as well. Even a slight increase in temperature causes animals to mate earlier.

Explanation:

thats nice :)

also hi hru

Answer:

D is the correct answer

Explanation:

ur welcome :3

Answer:

In harsh winter, usually there's less food, therefore, rabbits will not be able to find enough food and the population of rabbits will decrease.