Which statement best describes ecological succession?
A) It is always caused by human intervention.
B) It occurs after a disturbance.
C) It never occurs in a predictable pattern.
D) It is a series of rapid changes in an ecosystem.

Analyzing all the options:

A. Nuclear power: energy obtained by splitting atoms, and it is nonrenewable.

B. Solar power: it is energy provided by sunlight, hence it is renewable.

C. Geothermal power: this kind of energy is obtained by the heat inside of the Earth, hence it is renewable.

D. Wind power: energy obtained by the kinetic energy of the wind, and it is renewable.

Answer: Criminal Case

Explanation: In a criminal case, the prosecution bears the burden of proving that the defendant is guilty beyond all reasonable doubt. This means that the prosecution must convince the jury that there is no other reasonable explanation that can come from the evidence presented at trial

When Charles Darwin discover the various fish species on the island of Guadalupe house he was surprised to find so many different but related species in such a small geographical area.

The idea that best illustrate the correlation between competitive advantage in individuals traits in a particular environment is the principle of normal variation which states that:

Charles Darwin, full name Charles Robert Darwin, was an English scientist whose scientific theory of evolution by natural selection created the cornerstone of contemporary evolutionary research. He was born on February 12, 1809 in Shrewsbury, Shropshire, England and died on April 19, 1882 in Downe, Kent.

Darwin's most extraordinary contribution to science was to finish the Copernican Revolution by defining nature for biology as a system of matter in motion guided by natural laws. The genesis and adaptations of organisms were brought into the realm of science with Darwin's discovery of natural selection.

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Evolution is any modification or change in the organism's characteristics over many generations. The most recent evolution within Homo sapiens populations is about 50,000 years ago. This refers to evolutionary adaptation, sexual and natural selection, and genetic drift.

Humans are still undergoing evolution. Changes to adapt to environment is a genetic change and therefore considered as evolution. Blue eyes is considered as an evolutionary trait of humans recently. It came from a mutation from an ancestor 6,000-10,000 years ago. This just means that humans will continue to evolve because evolution is considered as a slow process that will take many generations.

A mistake in DNA sequence is called missence mutation that results in an incorrect amino acid fused into a protein. Due to such changes which the ribosome will know will result in a peculiar amino acid codon. It will cause the protein to be deficient in its function.

Answer - Option A

Answer:

A

Explanation:

Option A correctly describes the relationship between a change in the sequence of a cell's DNA, the proteins produced, and the function of the body tissue. DNA carries the genetic information that determines the sequence of amino acids in proteins. When there is a change or mutation in the DNA sequence, it can alter the structure and function of the proteins produced by the cell. Since proteins play crucial roles in various cellular processes and functions, any change in their structure can have significant effects on the proper functioning of the body tissue.

wearing sunglasses to protect eyes from UV ray is reasponse to an external stimuli.

the UV rays from the sun are the external stimuli, while the oter option are internal stimuli

The light reaction of photosynthesis is when the light provided activates the chlorophyll, which will split the water molecule, releasing H+ ions and oxygen. So, as this process occurs in the light process, it does not occur in the dark reaction. Therefore, the correct answer is a. Water is broken apart and oxygen released.

ATP is an adenosine triphosphate, the energy-carrying molecule found in the cells of all living things. ATP works as a shuttle, capturing energy from the breakdown of food and transferring it to the parts of the cell that require energy to run their processes.

ATP has stored chemical energy in the pyrophosphate bond, which lies between the last two phosphate groups of ATP. When the cells need energy to do any work, ATP cleaves the third phosphate group, releasing a large amount of energy stored in the bond between the third and second phosphate group. Energy is required for all the cell’s activities. This includes visible activities, such as muscle movement when running or talking, as well as those that cannot be seen by the human eye, such as the nerve impulses involved in thinking or feeling. ATP provides energy for all these processes.

The important polymer where adenosine monophosphate is found is RNA. Adenosine monophosphate (AMP) is one of the components of RNA.

The basic structure of a viruses is constituted by genetic material, which could be DNA or RNA, surrounded a protein structure called capsid. The genetic material, as in not viral life forms, carries the information necessary for the virus reproduction inside an infected cell.

Enveloped viruses: some viruses have a lipid coat with protein spikes (glucoproteins) to recognize possible hostage cells.

Answer:

Genes

Explanation:

Although the parents both have dominant eyes.

The child could have eyes from the grandparents that skipped a generation.

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If both parents carry the recessive allele for blue eyes, a blue-eyed person with two brown-eyed parents is possible.

Each individual receives two copies of each gene, one from the mother and another from their biological father. In this situation, both parents have the pigmented iris dominant allele (BB or Bb), so both seem to have brown eyes. Both parents, however, may be heterozygous for of the recessive allele for the blue eye gene (Bb), which they could pass on to their offspring with a 25% chance.

If both parents carry the recessive gene, their children have a 25% chance of inheriting two copies of the recessive variant (bb) and so having blue eyes. The blue-eyed person in this scenario inherited an allele that is recessive from each parent, culminating in their blue eye colour.

Therefore, while it is less common for a person with two brown-eyed parents to have blue eyes, it is possible if both parents are carriers of the recessive allele.

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Genes D and E are farthest apart on the same chromosome.

The value of crossover frequency between genes D and E is the highest, therefore, these two genes lie furthest apart on the same chromosome. As a general principle, the probability of a crossover between two particular genes is directly proportional to the distance between them. In other words, it can be said that the larger the value of the crossover frequency between two genes, the greater is the distance between them.

The unit centimorgan (cM) is generally used to estimate the distance between genes. One centimorgan is equal to hundred times the crossover frequency.

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Answer: A & D

Explanation:

CRISPR is a family sequences derived from viral DNA fragments, which is used by bacteria as a defense mechanism against bacteriophages. Together with the Cas9 enzymes, CRISPR is also a gene-editing tool. Therefore, the correct answer is the last option.

They hated carpetbaggers for making a profit off the southerners misfortunes. Scalawags, who were southerners, were hated for working with free blacks to form governments in an era when the "respectable people" who had supported confederacy couldn't.

The cytoplasm organelle represents this part of the cell.

The cytoplasm in prokaryotes, which are cells without nuclei, is the entirety of the plasma membrane. The water-based gel-like cytosol, which contains ions, small molecules, and macromolecules, is a key component of the cytoplasm in both prokaryotes and eukaryotes.

The cytoplasm is the name for the gelatinous liquid that makes up a cell's inside. It is composed of salts, water, and other chemical substances. Membranes separate the cytoplasm from some internal organelles, such as the nucleus and mitochondria.

The jelly-like material inside cells called cytosol supplies the fluid medium required for metabolic reactions. All animal cells, which are eukaryotic cells, also contain different cellular organelles.

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Answer:

Cell repair, photosynthesis and chemical reactions

Explanation:

Horses and donkeys are different species. They belong to similar family and genus. Their chromosomes are different from each other. When these species mate, they will produce an offspring called mule. The mule produced is considered as sterile because it cannot produce an offspring.

Answer - Option B - that horses and donkeys are different species.

Animal cells and plant cells are eukaryotic cells, that is, their genetic material (DNA) is stored within the nucleus.

These two types of cells, even though they are eukaryotes, still have some differences.

Plant cells have vacuole, chloroplast, and cell wall (these structures are absent in animal cells). Mitochondria are an organelle that is present in both animal and plant cells.

The correct statements are A and B:

A) Both plant and animal cells can have mitochondria;

B) In animal cells, chromosomes contain the master plan for cellular activities and cell development;

Statement "C" is incorrect because both animal and plant cells have a nucleus.

Social life is not complete without social difficulties. The term "social problem" refers to social circumstances, procedures, societal norms, or behaviors that are typically regarded as undesirable, detrimental, or endangering a number of values or interests, including social cohesion, the upholding of law and order, morality, the stability of social institutions, economic prosperity, or individual liberties. A social issue can also be perceived as a sense of collective guilt brought on by a failure to eliminate or improve certain unfavorable social situations that have a detrimental impact on particular segments of society.

Therefore, there is no presumption of value- or attitudinal neutrality in perception, interpretation, or intervention in this description of social issues. This specific characteristic distinguishes social phenomena that are seen to be social issues from other social or physical phenomena or situations that are thought to be difficulties tout court and that are possibly considered as not quite desirable or pleasant but without an element of threat.

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The first line of defense of the human's immune system is referred to as unspecific barriers whose main function is to block and prevent the entry of pathogens. It is composed of the skin, mucous and secretion such as saliva and sweat. Therefore, the correct answer to this question is option B, white blood cells, which have a more specific .

Viruses are likely to get mutations due to the fast reproduction cycle, this can lead to different replication mutations. the rate of mutations induced by the DNA polymerase is 1/100,000, it is low, but due to the fast spread of the viruses, it could induce some changes.

But one of the main characteristics of the Delta variant is its ability to evade the immune system, so I would say that the mutations that led to this variable were the environmental factors, because it adapted to be more contagious and also to be able to spread easily.

But to give the right answer it is necessary to look into the specific mutations this variable has in regard to the ones that come before.

Answer:

True............................

Let's take a look at the diagram for the cell cycle:

Recall that the order is from G1 phase to Telophase, where cells ready to undergo cell division start in interphase.

Let's define our answer choices:

0. Shrinkage of the nucleus

1. DNA duplication

2. Cytokinesis

3. DNA segregation

We are trying to find which of these answer choices occurs before cell division (which is known as mitosis/meiosis depending on the type of cell).

We can see from the cell cycle diagram that the stages before mitosis would be the G2 phase, the S phase, and the G1 phase.

Let's go through each of our answer choices:

0. Shrinkage of the nucleus - this answer choice ,never, happens in the cell cycle. The nucleus ,dissipates, or ,dissolves, away when the cell is ready to undergo mitosis.

1. DNA duplication - this answer choice is ,correct,. DNA duplication occurs during the ,S phase,, which is ,before, mitosis (cell division).

2. Cytokinesis - this is when the 2 cells during mitosis split and become 2 separate cells. This would signify the ,end, of mitosis, so this answer ,would not be correct,.

3. DNA segregation - this answer choice happens ,during, mitosis. Therefore, this answer choice is not correct.

Therefore, our answer choice is B.

Tissue is a term that best describes a group of similar cells working together.

What is a tissue?

First, cells on their own can function individually, they are the basic unit/  building block of every living organism, and they have the ability to grow, multiply and die. The cells in a Kangaroo provide structure for the body.

But, when two or more cells come together to perform a similar function, then they become a tissue. Tissue comprises of similar cells that work together to perform a specific task.

From the passage, connective tissue is formed from muscle cells of a kangaroo that organize together to form the structures that let a kangaroo walk, run, and hop, allowing it to avoid predators.

In summary, group of similar cells form tissues so they could perform a specific function.

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Answer: Does not appear so.

Explanation:

EMB agar is generally a dark red color. E. coli will grow with a green sheen on EMB. The colonies appear as if they may be slightly green but it is hard to tell with the condensation and lighting. It does not appear that it was grown on EMB though.

Refer to the picture below to visualize what E. coli growth looks like on EMB agar.

When the northern hemisphere is tilted toward the sun (90° North Pole - latitudes between the Equator and North Pole) it is experiencing summer.

Hyperthyroidism is an over production of the thyroid hormone and hypothyroidism is an underproduction of th ethyroid hormone.

Hyper means overproduction or more than necessary amounts of thyroid hormones are produced

Hypo means the is underproduction or less amounts of the thyroid hormone are produced.

Okay. We can say that it is possible to identify the cycle cell stage the cell are getting through in the shown diagram. It's metaphase since the nuclear envelope denatures itself, and chromosomes start to get visible on the cytoplasm, aligning themselves along the equatorial cell axis.

The correct option is the first one, Pancreas is to Insulin, as Liver is to Glucagon. The analogy refers to the organ and compound they interact with. Pancreas produces glucagon which interacts with the liver, while liver produces insulin like growth factors, which interacts with the whole body, including the pancreas.