The chromosome number in animas is kept the same from one generation to the next because of__.

Answer:

Plants have a cell wall, plastids, and chloroplasts. If any of these are options, take your pick.

Answer:

I think it is double helix

Answer:

Types of Placentation : Axile,Marginal, Parietal, Basal, Superficial Placentation

Axile Placentation.

This type of placentation is seen in bi- or multi carpellary, syncarpous ovary. ...

Marginal Placentation. It occurs in a monocarpellary, unilocular ovary. ...

Parietal Placentation. ...

Basal Placentation. ...

Superficial Placentation.

Explanation:

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For an individual who is heterozygous for two genes, aa and bb, independent assortment predicts that there will be four possible combinations of alleles that can be passed on to their offspring.

These combinations are AA, Aa, aA, and aa. Independent assortment is the process by which different pairs of alleles are passed on to offspring independently of each other. This is due to the random alignment of homologous chromosomes during meiosis I, which leads to different combinations of alleles in the gametes.

For example, if an individual is heterozygous for the genes A and B, then they have the genotype AaBb. During meiosis, the A and B alleles on homologous chromosomes can align in different ways and end up in different gametes. As a result, the offspring can inherit different combinations of alleles, such as AB, Ab, aB, or ab. This leads to genetic diversity among the offspring, which is a fundamental aspect of the process of evolution.

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An example of a plant virus is the Tobacco mosaic virus (TMV), which when infecting plants, cause them to have an stunted and irregular growth of their tissues, such as leaf and stems, which provokes the plant to not developing well

Chicken spends about 50% of the daylight hours foraging but also feeds, rests, preens and dustbathes. Type of chicken most likely you own is : Jungle fowl.

Wild Junglefowl and feral chickens spend almost half of their time foraging and the rest resting, preening and dust-bathing

Foraging behaviors are pecking and scratching at potential food sources, as well as looking for and sampling possible food sources. Wild chickens  forage on grasses, weeds and insects. Most chickens live on farms or as domestic pets but there are some chickens that live in the wild. Jungle fowl or feral chickens,  rely on their senses and predatory instincts to survive.

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Disruptive selection is the kind of natural selection that has taken place in this situation.

Option A is correct

The process that drives species evolution over time is known as natural selection. It is based on the idea of "survival of the fittest," which states that people who have certain good qualities are more likely to live and reproduce, passing those qualities on to their children. When a population exhibits variation that is heritable, natural selection takes place.

People who have characteristics that are better suited to their environment, such as those that enable them to find food or avoid predators, have a greater chance of survival and reproduction in natural selection than those who have characteristics that are less favorable. The population's frequency of desirable traits rises over time, while its frequency of undesirable traits decreases.

Incomplete question :

Chinook Salmon tend to be very large or very small. Medium sized salmon are not strong enough to fight off large salmon, but also not small enough to sneak in and fertilize eggs without getting caught.

What type of Natural Selection has occurred?

Question 3 options:

A.disruptive selection

B.diagonal selection

C.stabilizing selection

D.directional selection

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The diversity we observe today is the result of new adaptations emerging in the survivors of the extinction. The separation of two populations from a common ancestor is known as speciation. Biodiversity is increased by speciation.

Diversity is increased by speciation. The diversity of organisms within an ecosystem is known as biodiversity. It boosts biodiversity because speciation leads to the creation of new species.

The amount of biological diversity is directly inversely correlated with the pace of speciation. This implies that the diversity of a species will increase as speciation increases. Understanding the evolutionary tendency of any species and re-establishing the different bio-diversities already present on earth are both made possible by speciation.

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The difference in the arrival times of P-waves and S-waves for a station which is 5600km away is 448 seconds

The time difference in the arrival of P-wave and S-wave can be calculated using the formula :

Td = (8d ÷ 100)

Plugging the parameters into the formula :

Td = [(8 × 5600) ÷ 100]

Td = (44800 ÷ 100)

Td = 448 seconds

Therefore, the difference in the arrival times of P and S-waves is 448 seconds.

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Ok, hang on. I am gonna go look at it...

Answer:

B.chromosomes

Explanation:

because it is a DNA molecule contains the genetic information for an organism .

Answer:

the continents were connected

Explanation:

pangea

The combination of ore minerals and gangue found in an ore deposit is referred to as the ore. Thus, option C is correct.

Minerals are inorganic solids that develop in nature and have a crystalline structure as well as a specific spectrum of chemical formulas.

An ore deposit is a mineral deposit that is sufficiently rich to be exploited profitably. Mineral deposits are not all ore deposits, and vice versa.

All minerals are ores, but not all minerals are ores since some of them may contain significant amounts of undesirable materials like sand, stones, other earthy contaminants.

For instance: Clay and bauxite, two minerals that contain aluminum, are found in the crust of the planet.

Therefore, Minerals that are valued because they contain large amounts of a useful element are called ore.

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Yellow Ostrilopes had a higher chance of surviving in areas where there were predators because they blended in. A trait of yellow was adaptability.

The weather has changed to be dry. In this population, the distribution of traits changed as generations progressed in this environment, changing the large diversity of water-storage traits to solely Level 9 water-storage traits, which are adaptive traits.

A characteristic is a feature of the entire or a specific part of an organism's developmental pattern. Hence, an adaptive trait is a feature of the developmental pattern that aids in the survival and/or reproduction of its bearer in a particular series of conditions. It is up to the person to adopt the adaptive trait.

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Answer:

vascular tissues

hope it helps :)

Answer:

vascular tissue

Explanation:

In plants, hormones travel large throughout the body via the vascular tissue (xylem and phloem) and cell-to-cell via plasmodesmata.

Answer:different genes and their alleles are inherited independently within sexually reproducing organisms. During meiosis, chromosomes are separated into multiple gametes. Genes linked on a chromosome can rearrange themselves through the process of crossing-over.

Explanation:During meiosis, chromosomes are separated into multiple gametes. Genes linked on a chromosome can rearrange themselves through the process of crossing-over.

The goat would obtain a copy of the genes that control the horn formation trait from each of its parents and the way that the genes are combined is what would instruct the proteins to make the horns in a given shape.

In the genetics of Mendel, he did speak about the units of inheritance which are called the genes. These genes are located in the chromosome in the nucleus of a cell. The combination of the genes is what determines the expressed traits that an organism would have.

Now we know that genes often occur in pairs and the pairs of the genes are called the alleles. It is usual that the organism would obtain a copy of the pair of the alleles from each of the parents and this would ultimately influence the traits of the organism.

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We must set up settings for the plants where carbon dioxide is present in one test and missing in another in order to determine whether a plant requires carbon dioxide for photosynthesis.

In order to create nourishment from the raw ingredients they collect from their surroundings, plants engage in photosynthesis. We can look at the circumstances necessary for this process as well as the variables affecting its speed.

We must set up settings for the plants where carbon dioxide is present in one test and missing in another in order to determine whether a plant requires carbon dioxide for photosynthesis. There is 0.04% carbon dioxide in the air. Scientists can prevent plants from using carbon dioxide for photosynthesis by absorbing it from the air using sodium hydroxide.

In this experiment, a plant that has been destarched is wrapped with an airtight, transparent plastic bag. To absorb carbon dioxide, sodium hydroxide is a chemical that is added to the bag containing the plant. Iodine is used to test the leaves for starch after they have been left on the plant for 24 hours.

A lack of starch production will be seen in the leaves since photosynthesis cannot proceed without carbon dioxide.

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The correct option is D ; When leptin is released into the bloodstream, it tells your brain that you need to eat more. According to set point theory, the human body seeks to keep its weight within a certain range.

Throughout their adult lives, many people maintain a rather narrow range of body weight. Some people's systems may maintain them slender when they're young, but they can gain weight once they reach middle age.

Leptin is a hormone produced by adipose tissue (body fat) that helps your body maintain a healthy weight over time. This is accomplished by producing the sense of satiety, which regulates appetite (feeling full)

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There will be 50% blue eyes (genotype bb) and 50% brown eyes in the offspring (genotype Bb). There will be 50% homozygous dominant offspring and 50% heterozygous offspring (genotype Bb) (genotype BB).

Blue eye color is subordinate to brown eye color. Consequently, it is possible that both parents of a child with blue eyes and brown eyes have the heterozygous genotype Bb. Consequently, it is evident from the square below that there is a 25% chance of having a blue-eyed (bb) child.

The Punnett square below shows that there is a 25% chance of having a healthy homozygous (AA) child, a 50% chance of having a healthy heterozygous (Aa) carrier child, and a 25% chance of having an abnormal homozygous (AA) child at each birth.

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The enzymes required by E. coli to produce the amino acid tryptophan are encoded by the trp operon. The trp operon is a negative control mechanism, just as the lac operon.

The inducer that separates the repressor from the operator and derepresses the operon causes the lac operon to react. The lactose operon, sometimes called the lac operon, is a collection of genes present in E. coli and other bacteria that are dedicated to the absorption and processing of lactose.

Contrarily, the production of these enzymes is markedly increased by the presence of lactose. There is an extra regulatory mechanism in E. coli that regulates the expression of the lac operon genes in addition to the repressor-operator complex system. The name of this extra mechanism is catabolite repression.

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Answer:

5. True

6. True

7. False, as earth is farthest to the sun during July not closest.

8. False, as earth is closest to the sun during January not farthest

The term that would best define the fish added to the pond is INTRODUCED species. These species may be harmful to native species.

Introduced species are exotic species which has arrived there by human activity, which may be harmful to native species.

Introduced species may even be harmful to the entire ecosystem because they can break the delicate equilibrium of the ecosystem.

Introduced species may compete with native species for limited resources (e.g., water resources, foods, habitat, etc).

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Answer:

To sum it up, it's A "Introduced species"

Explanation:

It's correct. Have a blessed day <3

The mental abilities of non-human animals, such as insect cognition, are included in the category of animal cognition. Comparative psychology was the foundation for the study of animal learning and conditioning that is applied in this discipline.

Animal cognition have shown evidence of cognitive skills like causal and logical reasoning, mirror self-recognition, deceit, symbolic communication, foresight, tool creation, and tool usage. The different ways that nonhuman animals can use animal cognition and learning mechanisms to address challenges in their surroundings. Although many animals possess unique cognitive skills that help them thrive in their unique settings, they do not frequently find solutions to new issues. Of course, some of them do, and we refer to them as intellectual, but none of them are as witty as we are. Chimpanzees are the closest surviving cousins to us, so it makes sense that they would rank among the most intelligent creatures in Animal cognition.

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Multimedia presentation that summarizes the thesis and main points of our research paper on animal intelligence can be made by including following points :

Intelligence is one of the characteristic features of being human and it comes in various forms. For example, there’s verbal-linguistic intelligence  which is also known as communicative ability, spatial intelligence which is basically the ability to observe the world with the mind’s eye , logical-mathematical intelligence which is basically the ability to solve mathematical problems and emotional intelligence is known to be the ability to identify and manage your own emotions and the emotions of others. There are also many other types of intelligence which, in the process of understanding the workings of the human mind, we have tried to disentangle and define.

When we talk of Animal Intelligence, we talk in quite different terms. The study of animal intelligence has a long history. Ever since Darwin’s book titled as the Origin of Species was published, scientists have attempted to understand how animals think, comparing and contrasting this with human thought.

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Answer:

True breeding

Explanation:

A true breeding is a kind of breeding wherein the parents would produce offspring that would carry the same phenotype