Which of the following describes the dependent variable?

A. The group in which conditions were not changed

B. The variable that is being manipulated by the experimenter

C. The variable that is observed or measured the the experimenter

D. The observation that the experimenter made that started the experiment

Answer:

because of the energy and heat loss at each level of the pyramid

Explanation:

Producers (photosynthetic beings) are the ones who are at the base of the food pyramid, and for this reason, they are the ones with the most energy availability. ,

When a primary consumer feeds on producers, the energy stored in organic compounds is transferred to him. Consumers then use ingested organic matter to produce energy, which, in turn, is used to carry out some processes for their survival. Another part of the substances ingested is lost in feces and urine.

When serving as food for another organism, primary consumers transfer their energy to that secondary consumer, and so on. Therefore, at each level of the pyramid, less energy is passed, and then less energy is available, the more difficult and competitive it becomes for subsequent consumers.

Answer:

at each chiasma, the chromosomes will break and then rejoin,trading some of their genes

Explanation:

In a Punnett square for a two-factor cross, it is not possible for all of the offspring to be identical.

The Punnet square simply refers to a square diagram that's used for the prediction of the genotypes of a breed. The diagram is usually used by biologists in order to determine the probability of the genotype of an offspring.

For example, if there's a dominant and recessive genes represented as B and b. When they're crossed, the offsprings that are gotten will be BB, Bb, Bb, bb.

From the above, it shows that in a Punnett square for a two-factor cross, it is not possible for all of the offspring to be identical.

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Cells have a maximum diameter of slightly over 100 micrometer due to chemicals or mutation.

Prokaryotic cells diameter ranges from 0.1 to 5.0 micrometers (μm) which are smaller than eukaryotic cells, which have diameters ranging from 10 to 100 μm.

Some cells have attain the diameter of over 100 micrometer which may be due to mutation or exposure to chemicals so we can conclude that Cells have a maximum diameter of slightly over 100 micrometer due to chemicals or mutation.

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The statement location plays a role in wetland type but is not the sole determining factor is true.

Wetlands are areas where water covers the soil or is present either at or near the surface of the soil all year or for varying periods of time during the year, including during the growing season.

The characteristics of the fate line depend on the location primarily on its latitude and longitude. The direction and movement of the sun also affect the wetland types.

Therefore, The statement location plays a role in wetland type but is not the sole determining factor is true.

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Answer:

True!

Explanation:

Answer:

the skin on your body

Explanation:

because it is a tough cover it protects the body in many ways,thus it's water proof.

Answer:

It protects twenty-five percent of the world’s plant species.

Explanation:

Answer:

It stores 100 billion metric tons of carbon.

Explanation:

.

Answer:

Explanation:Invertebrates are animals without spines, while vertebrates have a spine. Invertebrates are sometimes (mistakenly) thought of as primitive because of their lack of developed organs. Their simple internal systems include respiratory systems such as gills or trachea and they often use an open circulatory system to pump their blood. As invertebrates lack an internal skeletal

structure, they sometimes have an external skeleton that protects their soft bodies called an “exoskeleton.” In general, invertebrate success often comes from their ability to reproduce extremely quickly, unlike many vertebrates who take years to become fully grown.

Vertebrate animals, on the other hand, have a spine that develops from a notochord they possess as an embryo. They also have defined internal systems like complex respiratory structures, a closed circulatory system and sensory organs that build the nervous system. Vertebrates tend to be larger than invertebrates, thanks to their backbone, which allows their bodies to grow larger and move faster than many invertebrates.

The statement that best describes invertebrates and vertebrates is invertebrates do not have a backbone and vertebrates have a backbone.

Invertebrates may be defined as any animal that lacks a vertebral column, or backbone, in contrast to the cartilaginous or bony vertebrates.

Invertebrates do not possess a backbone and an internal skeleton, but they have an exoskeleton. They possess an open circulatory system. While on the other hand, vertebrates possess a backbone and an internal skeleton, but they do not possess an exoskeleton. They possess a closed circulatory system.

Therefore, the statement that best describes invertebrates and vertebrates is invertebrates do not have a backbone, and vertebrates have a backbone.

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Answer:

eat, lignite, bituminous, and anthracite.

Explanation:

The stage depends upon the conditions to which the plant remains are subjected after they were buried: the greater the pressure and heat, the higher the rank of coal.

Answer:

There are four stages in coal formation: peat, lignite, bituminous, and anthracite.

Explanation:

Stage one: Peat is the first stage in the formation of coal. Normally, vegetable matter is oxidized to water and carbon dioxide. However, if plant material accumulates underwater, oxygen is not present and so only partial decomposition occurs. This incomplete destruction leads to the accumulation of an organic substance called peat. Peat is a fibrous, soft, spongy substance in which plant remains are easily recognizable. It contains a large amount of water and must be dried before use. Therefore, it is seldom used as a source of heat. Peat burns with a long flame and considerable smoke.

Stage two: Lignite, the second stage, is formed when peat is subjected to increased vertical pressure from accumulating sediments. Lignite is dark brown in colour and, like peat, contains traces of plants. It is found in many places but is used only when more efficient fuel is not available. It crumbles easily and should not be shipped or handled before use.

Stage three: Bituminous Coal is the third stage. Added pressure has made it compact and virtually all traces of plant life have disappeared. Also known as “soft coal”, bituminous coal is the type found in Cape Breton and is our most abundant fuel. It is greatly used in industry as a source of heat energy.

Stage four: Anthracite, the fourth stage in coal formation, is also known as “hard coal” because it is hard and has a high lustre. It appears to have been formed as a result of combined pressure and high temperature. Anthracite burns with a short flame and little smoke.

The change that bring about proliferation is D. an organism's cells divide many times adding mass to the organism.

Therefore, option D is correct

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Answer:

C. an organism's cells multiply many times adding mass to the organism.

Explanation:

After reading, it was C.

In the grassland ecosystem, rabbits must be capable of producing more offspring than are able to survive, this condition must be met the evolution by natural selection to occur within the rabbit population. Thus, the correct option is C.

Natural selection is the process through which different populations of living organisms adapt and change according to the surrounding environment. Individuals in a population are naturally variable with respect to environmental conditions, meaning that they are all different in some ways or the other. This variation in population means that some of the individuals have traits which are better suited to the environmental conditions than that of others.

Rabbits must be capable of producing more offspring than they are able to survive. This conditions must be met for the evolution by natural selection to occur within the rabbit population.

Therefore, the correct option is C.

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Answer:

Camoflauge.

Explaination:

Camouflage is when a species changes to resemble its surroundings to protect itself.

Structural adaptations are physical features of an organism such as spikes on a hedgehog.

Since camoflauge is not a physical feature, it is therefore not a structural adaptation.

Hope this helps!

Answer:

yes

you are right

Explanation:

membrane present and contains genetic

Answer:

moon, sun, and earth are in alignment

Answer:

Nervous System could be studied as a direct result of having defective nuclei and may shed light on the  cause of Parkinson .

Explanation:

PASRKINSON DISEASE -: Parkinson's disease is a progressive nervous system condition. Several regions of the brain are affected by the condition, especially an area called substantia nigra that regulates balance and movement.

A trembling or shaking (tremor) of the limb is often the first sign of Parkinson's disease, particularly when the body is at rest. Typically, on one side of the body, the tremor starts, usually in one hand. The head, legs , feet, and face can also be affected by tremors. Other hallmark symptoms of Parkinson's disease are rigidity or rigidity of the limbs and body, slow movement (bradykinesia) or inability to move (akinesia), and impaired balance and coordination (postural instability).

Emotions and thinking ability (cognition) can also affect Parkinson's disease. Psychiatric disorders such as depression and visual hallucinations are created by some affected persons. There is also an increased risk of developing dementia in people with Parkinson's disease, which is a loss in intellectual functions, including judgment and memory.

Hence , the answer is the nervous system and other regions of brain where the disease has a direct result of having a defective nuclei and may shed light on the cause of Parkinson .                      

Answer:

A

Explanation:

nitrogen is a fundamental source of amino acids. And amino acids are building blocks of proteins

The "missing link" between different species. man and chimpanzee,

the evidence linking these species are their similar body structures, behavior and intellect.

The two species studied are men and  chimpanzee, the evidence linking these species are their similar body structures, behavior and intellect.

The evidence for this discovery is that in Ethiopia in 1974 it was named Lucy (in honor of the Beatles "Lucy in the Sky with Diamonds"). Its bones date back to 3.2 million years ago. The brain was small and its height was no more than one meter.

It was classified among the Australopithecus afarensis and for a long time held the post of the grandmother of humanity.

In this question, We imagine that we are paleontologists trying to find the "missing link" between different species. man and chimpanzee, we created a fictional narrative about this discovery.

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Answer:

A= CHON or Carbon, Hydrogen, Oxygen, and Nitrogen

Explanation:

My biology teacher.

Answer and Explanation: Nondisjunction occurs when sister chromatids are not pulled apart at anaphase II. This will cause both sister chromatids/ homologous chromosomes to be pulled to just one pole of the cell.

Since the anaphase I stage in Meiosis I occurred without errors, this would result in four haploid gametes being produced.

However, two of these gametes will be normal, will have the normal number of chromosomes. The other two gametes would have an abnormal number of chromosomes and be aneuploid. One would have n+1 number of chromosomes, and the other would be n-1.

Answer:

The

Explanationbrain:

If the Anastasia is given to prevent pain so it is put just before the brain so that the pain could not be received.

Answer:

Our experimental results show that a proper manner of an integrated pest management (IPM) cut pesticide use without any yield penalty.

Cells are the smallest living part of organisms. When groups of similar cells come together, they form tissues. Groups of tissues that work together to perform a function are called an organ. Groups of organs that work together to perform a job are called an organ system. The body is made up of multiple organ systems.

Answer:

The first leaf represents hope, the second stands for faith, the third is for love and the fourth leaf brings luck to the finder.

Explanation:

What causes smog in L.A. and in Mexico City? Describe at least factors.

The smog is trapped in the valley and cannot be carried away by wind.

Describe one change to factories and power plants intended to reduce air pollution.

Reducing toxic emissions from industrial sources, reducing emissions from vehicles and engines through new stringent emission standards and cleaner burning gasoline; and addressing indoor air pollution though voluntary programs.

Describe one change to automobiles and buses intended to reduce air pollution.

Using fuel efficient vehicles, or electric vehicles.

Describe one way that commuters can now reduce air pollution.

Choose a cleaner commute, share a ride to work or use public transportation. Combine errands and reduce trips. Walk to errands when possible. Avoid excessive idling of your automobile.

Explanation:

DNA Polymerase III synthesizes the majority of the DNA, while DNA Polymerase I synthesizes DNA in the regions where the RNA primers were laid down on the lagging strand.