A single pair of goldfish in a aquarium produced a large number of offspring.

These offspring showed variations in body shape and coloration.

The most likely explanation for these variations is what?


(A.) Offspring were adapting to different environments.

(B.) Parent fish had not been exposed to mutagenic agents.

(C.) Offspring were produced from different combinations of genes.
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The answer is 0.11. I just did the quiz on Apex.

Final answer:

To find the frequency of allele q when p is 0.89, we subtract p from 1, resulting in q = 0.11, in accordance with the Hardy-Weinberg principle that states p + q = 1.

Explanation:

If the trait in question has two alleles, represented by p and q, and p is given as 0.89, we can find q by using the Hardy-Weinberg principle, which states that p + q = 1 for a population in genetic equilibrium. Since we know the value of p, we can subtract it from 1 to get the value of q.

q = 1 - p = 1 - 0.89 = 0.11.

So, the frequency of allele q is 0.11.

Algae, nonvascular plants, seedless vascular plants, gymnosperms, angiosperms

Answer:

preventing friction between bones

The correct answer is B. Preventing friction between bones

Explanation:

Cartilage is a soft, and elastic tissue that protects the end of bones in articulations; although this tissue also forms structures such as the ear. In the case of cartilage in bones, the main function of this is to act as a protector for the bones by reducing the friction between them. For example, cartilage is found in the joints. This is necessary because bones are hard structures and direct friction between them would lead to deterioration of the bones. According to this, the main function of cartilage is preventing friction between bones.

I believe the answer is dry and highlands. They have very low levels of precipitation.

Answer:

The correct answer would be Dry and polar climates.

Explanation:

Steppes and deserts comprise the regional part of the earth that is characterized by dry climates. Dry climates are semiarid or arid areas that have 3 major characters which are very low precipitation, high evaporation rates, and wide temperature swings both seasonally and daily.

Polar climates are windy, cold and dry. The lack of precipitation or very low precipitation and low temperatures is the reason that the Arctic and Antarctic are said to be the world's largest Polar deserts.

Thus, the correct answer would be Dry and polar climates.

Answer:

The answer is C. DNA from the S bacteria is necessary for bacterial transformation to occur.

Explanation:

When heat-killed nonvirulent S bacteria will be treated with enzymes that degraded DNA it will destroy the genetic information required for cell survival. DNA is very essential for an organism and is called the molecule of life. DNA degradation is also a part of cell death called apoptosis. That's why all the samples grew except the one where DNA was enzymatically degraded.

Answer:

C. DNA from the S bacteria is necessary for bacterial transformation to occur.

Explanation:

Penn foster

I think its b because it can hurt your tissues and it will cause you not to breathe

Answer:

B) lung volume cannot increase as much and so air pressure cannot decrease

Explanation:

If air will enter the chest cavity then lung will not find proper space to expand. As we all know that pressure and volume both have inverse relation that means an increase in volume leads to decrease in pressure. In short, if volume increases, pressure decreases.

In normal condition, if air enters lungs, the lungs withstand the increased air pressure by expanding themselves. Expansion of lungs volume reduce the pressure which air exerts on them.

But, in pneumothorax condition since the chest cavity where lungs are situated is filled with air so when air will enter the lungs, the lungs will not find required space to expand and air pressure will not decrease leading to short and shallow inspiration.

I believe it’s a detective

Answer:

soil erosion is the answer

Final answer:

If events A and B are dependent, it means that A's occurrence can affect the probability of B's occurrence.

Explanation:

If events A and B are dependent, it means that A's occurrence can affect the probability of B's occurrence. In other words, the probability of B happening is not the same whether A happens or not. For example, let's say event A is rolling an even number on a fair die and event B is rolling a number greater than 4. If event A occurs and we roll an even number, the probability of event B happening (rolling a number greater than 4) is now reduced, because there are fewer numbers greater than 4 among the even numbers. Therefore, the correct answer is C) A's occurrence can affect the probability of B's occurrence.

Answer: Different rabbits have different food preferences, just like humans. Generally speaking, rabbits like sugary foods best of all, so you could say rabbits like fruit best, then carrots, then lettuce.

What a rabbit likes to eat isn't necessarily what's good for them to eat. Rabbits should mostly eat hay, plus some rabbit pellets and fresh leafy greens (like dark-coloured lettuces) every day. Treats (like fruit and carrot) can be served in strict limitation because too much can make the rabbit ill.

Explanation:

Do rabbits eat lettuce?

No it's very bad for them but they can eat romaine lettuce.

More Info:

Wild rabbits do eat lettuce when they come across it but it isn't a major part of their diet. Pet rabbits can eat some kinds of lettuces sometimes.

Answer:

D. for classifying organisms and studying biodiversity

Explanation:

A and C are irrelevant because there was only one organism to observe therefore the scientist could not observe how it interacted with others.  B is irrelevant because the scientist did not have an ecosystem to observe.

A dichotomous key is an important scientific tool. Based on observable trait, it is used to identify different organisms. As the scientist used this tool to determine lizard, this implies that the purpose for classifying the organism and studying biodiversity, i.e., option D.

Dichotomous keys consist of characters along with two choices in each step that helps scientists for proper and correct identification.

It can be complex or simple depending upon the organism.

As the scientist wants to identify the lizard this implies that the purpose for classifying the organism and studying biodiversity.

Thus, the correct option is D.

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Answer:

The Photic Zone is the surface layer of the ocean that receives the sunlight.

Explanation:

With sexual reproduction a sperm coming from the male must unite with the female egg. Both are needed for this kind of reproduction, and an offspring CAN'T  be formed without both. Unlike asexual reproduction, the offspring of a mammal reproducing sexually is DIFFERENT from both parents, since the offspring is a combination of both the mother and the father.

An easy to remember example I use when thinking about what sexual reproduction is:

the formation of a human child. A mother with her egg and the father with the sperm is BOTH needed. If you think about siblings that come from the same parents (and therefore same gene pool) they are not all exactly identical to each other. Although they may have similar features, they look different and are NOT genetically identical

Therefor for your question the answer is D.

Hope this helped!

Answer:

D. a female egg cell combines with a male sperm cell to make an offspring that is different from both parents

Explanation:

Hi!

It would be C, remove waste.

Hope this helps!

I'm pretty sure it's c.

The two moons of Mars.Answer:B

Answer:

I believe it is B

Explanation:

variable shapes and variable volumes

Liquids have a definite volume but their shape is variable and conforms to the shape of the container they are in.

Liquids are one of the three common states or phases of matter. Unlike solids which have a definite shape and volume, liquids have a fixed volume but do not have a fixed shape. Instead, liquids take on the shape of their container. This is because the molecules in a liquid are not locked in place; they are bonded to neighboring molecules but have the ability to move freely with respect to each other while still being in close contact, which leads to a definite volume but no specific shape. Gases, on the other hand, have neither a specific shape nor a definite volume.

Final answer:

Short plants reappeared in the F2 generation because they inherited two recessive alleles for shortness after the F1 generation plants self-pollinated and segregated alleles during gamete formation.

Explanation:

Short plants reappeared in the F2 generation of Mendel's experiments because the trait for shortness, although hidden in the F1 generation, is a recessive trait that can manifest when two recessive alleles are present.

In Mendel's first experiment, a tall plant (dominant trait) was crossed with a short plant (recessive trait), resulting in F1 offspring that were all tall because they had one tall allele and one short allele (Tt), with the tall trait being dominant.

When the F1 generation plants self-pollinated, some of their offspring (F2 generation) received two short alleles (tt). According to Mendel's law of segregation, these F2 offspring exhibited the short phenotype because they lacked the dominant tall allele.

Answer:

B. Parasitism

Explanation:

Parasitism is a type of symbiotic relationship that exists between two different species. In this relationship, one organism (the parasite) lives in or on another organism (the host). The parasite gains benefits, while the host is harmed and do not gain any benefit. From the question, the type of symbiotic relationship that exists between the worm and the cow is parasitism. The worm which lives inside the cow and benefits from the interaction is the parasite, while the cow that is harmed (malnourished) is the host.

Answer:

B. Parasitism

Explanation:

Parasitism is a not harmonical ecological relationship, that is, an interaction between living beings, one of which benefits from obtaining food while another is harmed.

The parasite is a living being that associates with another, which is called a host. The parasite uses the host to feed, causing disease. In many cases, the damage caused is usually not very serious, since if the host dies if the parasite will die as well.

Answer:

Mutations in genetic code occurs when DNA is being duplicated.Any changes in the base pairs leads to mutations by trasition or transversion. Change in amino acid leads to change in sequence and thus, mutation. This si carried on to new generation, if it takes place in germ cells.

Mutations occur in the genetic code by substitution, deletion, insertion, duplication, insertion, and translocation.

Substitution: A nucleotide is replaced by a different nucleotide, resulting in a change in the DNA sequence. Insertion: An extra nucleotide is inserted into the DNA sequence, causing a shift in the reading frame.

Deletion: A nucleotide is deleted from the DNA sequence, causing a shift in the reading frame.

Duplication: A segment of DNA is duplicated, leading to an increase in the number of copies of a particular DNA sequence.

Inversion: A segment of DNA is flipped in orientation, changing the order of nucleotides.

Translocation: Genetic material is exchanged between non-homologous chromosomes, resulting in the rearrangement of genetic sequences.

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Answer:

Bathypelagic Zone

Explanation:

This zone occurs above the Abyssopelagic zone and below the Mesopelagic zone. The zone is dark because little light reached this region. Only a small proportion of the higher frequency visible light (red light)reaches this region. The sea creatures in this region will be predominantly back or red in color.

Answer:

inorganic substance

Explanation:

Answer:

inorganic substances

Explanation:

Answer:

so surface area is the limit

Explanation:

As a cell grows, its volume increases at a faster rate than its surface area. Therefore, the volume of a cell is limited by its surface area, which is directly related to its ability to permeate required materials through its membrane. Surface area limits the diffusion of nutrients into the cell.

The limits to cell growth include the Hayflick limit, which restricts the number of times cells can divide, and the inefficiency of diffusion over long distances, which imposes a size limitation. Additionally, overall growth is constrained by factors leading to saturation, where further increases may not promote or may even hinder growth.

Cells cannot grow indefinitely due to several critical factors. The Hayflick limit is a fundamental limit on the number of times cells can divide. This concept demonstrates that cells have a numerical limit to division, after which they can no longer proliferate. This limit is closely associated with the mechanical wear and tear analogy, where, just like mechanical devices, cells "wear out" over time through repeated cycles of division.

Regarding cell size, there are upper and lower size limits. The distance travelled by substances within the cell places an upper limit on cell size due to the inefficiency of diffusion over longer distances. This limitation means that large cells would be unable to efficiently transport nutrients and waste, leading to the necessity for cells to either remain small or change shape for better diffusion efficiency. Conversely, there is a lower limit to cell size determined by the need to house essential cellular machinery, such as DNA, ribosomes, and enzymes, within the cell.

When it comes to overall growth, factors such as nutrient availability, environmental conditions, and physical space impose limitations. These factors can encourage growth up to a point, known as saturation, beyond which growth either plateaus or declines due to toxicity or resource depletion. This phenomenon highlights the delicate balance organisms must maintain to support growth within the constraints of their environment.

Not consuming enough protein can cause muscle cramps, weakness, and soreness

The body would break down existing muscle to get the amino acids it needs.

Answer: anaphase

Explanation: The mitosis is the process by which cells are divided. That division has different phases.

It is during the anaphase that the sister chromatids are separated at the centromere and are pulled towards opposite poles of the cell by the mitotic spindle.

During mitosis, sister chromatids separate at their centromeres in the anaphase. This separation is essential for each daughter cell in the cell division process to receive an identical set of chromosomes.

In mitosis, the phase in which sister chromatids separate at their centromeres is anaphase. During this phase, the paired centromeres of each sister chromatid separate, and the now individual chromosomes are pulled apart towards the opposite ends of the cell. The movement is facilitated by the shortening of microtubules, structures of the spindle fibers. The chromosomes' movement to opposite poles of the cell ensures that each daughter cell will receive an identical set of chromosomes during cell division.

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The dams are very useful for the people and their needs, but they also very often cause problems in the ecosystems in the rivers on which they are built on. For starters, the dams limit the movement of the species, as well as the movement of the nutrients, and considering the fact that this effects the lifestyle of certain species, as well as changing the nutritional quality of the water, it heavily affects the ecosystem. The water upward from the dam is accumulated, and because its movement is largely stopped, the water is more stagnant. The more stagnant water is getting warmer much more easily, so the temperature change of it results in change in the habitat of the species, often resulting in destabilizing the ecosystem, with some species dying out, while others exploding in numbers.

Answer:

use of fossil fuels..........

because we use it as petrol and C.N.G and diesel

Answer:

Cerebrum it helps you think to solve problems and its also helps you read and write, and, learn. Hope this help you :)

Answer:

The correct answer to the question: What part of her brain is at work, when Penelope is adding fractions while taking a math test, is a complex one, and now science knows that there is not one, but three regions that act together in all mathematical activities: the posterior parietal cortex, ventrotemporal occipital cortex and the prefrontal cortex.

Explanation:

According to the latest research studies in neuroscience, and published in such journals as the Journal of Neuroscience, it has been discovered that, unlike what it used to be believed, that there was one simple place where mathematical thinking was performed, now there are three regions of the brain that carry out this process. These three, and depending on their size and number of grey matter, will ensure more, or less, mathematical skills, in a person. These three regions are interconnected and act together whenever a person is facing mathematical problem-solving.

Answer:

Viruses and Bacteria

Explanation:

Bacteria are single-celled, prokaryotic microorganisms that exist in abundance in both living hosts and in all areas of the planet. By their nature, they can be either "good" or "bad" for the health of plants, humans, and other animals that come into contact with them. A virus is acellular (has no cell structure) and requires a living host to survive; it causes illness in its host, which causes an immune response. Bacteria are alive, while scientists are not yet sure if viruses are living or nonliving; in general, they are considered to be nonliving.

Infections caused by harmful bacteria can almost always be cured with antibiotics. While some viruses can be vaccinated against, most, such as HIV and the viruses which cause the common cold, are incurable, even if their symptoms can be treated, meaning the living host must have a strong enough immune system to survive the infection.

Viruses, much smaller than bacteria, rely on host cells to reproduce and share few characteristics with living organisms. They are simpler than bacteria, which are capable of independent reproduction and metabolic activities. The relationship between viruses and their hosts is critical to viral lifecycle strategies.

Viruses are much smaller than bacteria; most viruses range from 5 to 300 nanometers, whereas bacteria typically measure between 1,000 to 2,000 millimicrons. This difference in size is because viruses have a simpler structure, consisting mainly of a nucleic acid core and a protein coat, while bacteria are complex, cellular organisms with a full suite of cellular machinery. As a result, viruses can only reproduce by infecting a host cell, contrasting with bacteria that can reproduce on their own. In terms of their biology, only certain characteristics of life are evident in viruses, as they exhibit parasitic replication and genetic variation, but they do not fit the conventional definition of life since they cannot carry out metabolic processes independently.

Viral vs. Bacterial Reproduction

The modes of reproduction for viruses and bacteria differ significantly. Viruses rely on a host's cellular machinery to replicate, injecting their genetic material into the cell and commandeering it to produce new viruses. Bacteria, in contrast, often reproduce independently through binary fission, a process in which a single cell divides into two identical daughter cells.

Living Characteristics and Viral Dependency

While viruses share some characteristics with living organisms, such as the ability to evolve, they are not considered alive because they do not have the cellular structure necessary to carry out metabolism without a host. A virus depends on a host cell for virtually all its life processes. For instance, the influenza virus maintains the viability of its host cell to ensure the successful production and release of new viral particles.

The Nature of Viruses

A virus, such as a phage, is an acellular entity that typically comprises two main components: genetic material and a protective protein coat. By acting only within living cells, viruses exhibit a level of opportunistic survival strategy, highlighting the intricate relationships they maintain with their biological host environments.

Answer:

B) The biomass of trees is much greater than smaller producers, like grasses and shrubs. One tree can support many primary consumers.

Explanation:

Answer:

b

Explanation:

Answer:

1. scientific method

2. two

3. independent variable