The cro-magnons, who lived lived 30,000 years ago, belonged to what species?.

The structure responsible for moving things through the cell, as well as the cell itself, is the cytoskeleton. It is a network of protein filaments that provides structural support, maintains cell shape, and enables cell movement and the transport of materials within the cell.

The cytoskeleton is responsible for moving things through the cell, as well as the cell itself. It is a network of protein filaments that provide structural support, shape, and organization to the cell. The cytoskeleton is also involved in a variety of cellular processes, including cell division, movement, and intracellular transport.

There are three main types of cytoskeletal filaments: microfilaments, intermediate filaments, and microtubules, each with specific functions in the cell. Microfilaments, made of the protein actin, are responsible for cell movement and support. Intermediate filaments provide mechanical strength and stability to the cell, while microtubules, made of the protein tubulin, are responsible for intracellular transport and cell division.

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Answer: Scientific investigation is a quest to find the answer to a question using the scientific method. In turn, the scientific method is a systematic process that involves using measurable observations to formulate, test or modify a hypothesis.

Answer:

True

Explanation:

This process of producing new cells is called cell reproduction

Answer:

Explanation:

Explanation:

The simple answer is, we do not know for sure. But there are several theories that pose a solution. I will list

2

of the more popular ones below:

1) Life evolved by accident, from molecules forming randomly in the ocean. This is the theory that most scientists today believe in today. It is believed by some scientists that the accidental creation of a single molecule of self-replicating RNA (similar to DNA) in the oceans of the world led to the eventual creation of cells.

2) Life came from outside of Earth. This is a theory believed by many science fiction fans and even scientists alike. It is possible that life never originated on Earth (maybe instead, it originated on Mars or an asteroid), and some of this life crashed upon Earth's surface in the form of a meteor. Of course, we are not talking about little green men, but rather unicellular bacteria. It has already been proven that some bacteria can survive in the vacuum of space when frozen, so this theory (however unlikely) might still believe how life began on Earth.

Those are the

2

more popular theories, but others exist. Of course, I didn't mention ideas like a superhuman being or beings (god(s)) being responsible for life on Earth, because there is not much scientific evidence supporting these ideas.

I hope that helps!

According to many theories life came on sea and the first organism was amoeba.

By chance, life emerged from molecules that formed at random in the ocean. Today, the majority of scientists subscribe to this hypothesis. Some researchers think that the accidental development of a single self-replicating RNA (DNA-like) molecule in the world's oceans resulted in the development of cells.

Life on Earth originated elsewhere. Many fans of science fiction and even some scientists concur with this theory. It's possible that life didn't begin on Earth at all, but rather on Mars or an asteroid, and that some of this life eventually fell to Earth in the form of a meteor.

Of course, we're not referring to little green men here; rather, we're discussing single-celled bacteria.

Therefore, According to many theories life came on sea and the first organism was amoeba.

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Answer:

It does not contain chlorophyll which is needed to absorb light or energy.

Answer:

The parts without chlorophyll do not photosynthesise, and so they do not make starch and the iodine does not change colour.

The green parts contain chlorophyll and photosynthesise to make starch.

The white part of the leaf does not contain chlorophyll, so does not photosynthesise.

Explanation:

Answer:

non-covalent hydrogen bonding between paired bases :)

Explanation:

have a wonderful weekend stay safe!

Answer:

Hydrogen

Explanation:

The two sides of a dna ladder are connected by a row of hydrogen bonds

Answer:

airlines - nontestable

pollutants- Testable

chocolate- Testable

meat- Nontestable

Explanation:

i just took the test nd got it right

D) Formula for a stable, binary compound formed between Mg+2 and S-2 will be MgS .

It will take one -2 sulfide ion to balance one +2 magnesium ion to form a magnesium sulfide.

Magnesium sulphide, abbreviated MgS, is an inorganic compound. It is a white crystalline material, but it is frequently encountered in impure form as a brown, non-crystalline powder. It is produced industrially during the manufacturing of metallic iron.Sulfur is the first element removed in the BOS steelmaking process. Sulfur is removed from impure blast furnace iron using a lance and several hundred kilogrammes of magnesium powder. Magnesium sulphide is formed and floats on the molten iron, where it is removed.

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A. The most appropriate test for their study is a Poisson regression because the researchers are comparing the count of food eaten by cuttlefish across different temperature conditions. Poisson regression is used to model count data, which makes it an appropriate statistical test for this study.

B. A more appropriate estimate of the p-value would be greater than 0.054 because the researchers did not use the most appropriate test for their study. If the Poisson regression was used to calculate the p-value, it would be different from 0.054.C. The conclusions of the study could potentially change if they had used the most appropriate test. If the p-value obtained from the Poisson regression was less than 0.05, then there would be evidence to reject the null hypothesis and support the alternative hypothesis that cuttlefish will eat more at a higher temperature. However, if the p-value was greater than 0.05, then there would be insufficient evidence to reject the null hypothesis and the study would not be able to support the claim that temperature has an effect on cuttlefish diet.

Cuttlefish or domestic fish are animals that live in waters, especially rivers and seas or lakes. These animals can be found in almost all large bodies of water, both fresh water, brackish water and salt water at varying depths, from near the surface to several thousand meters below the surface. What do cuttlefish breathe with? Generally, in terms of body size, cuttlefish are larger than squid. Squid and cuttlefish both have fairly large eyes, with black centers and silver edges. Breathe using gills like fish and squid.

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Answer:

a

Explanation:

the data given shows the answer

Autotrophs class of organisms gather their energy directly from the sun.

Autotrophs- 1: Compared to heterotrophic plants, autotrophic plants just need carbon dioxide or carbonates as a source of carbon and a straightforward inorganic nitrogen component for metabolic synthesis of organic molecules (such as glucose). 2: having a regular metabolism without needing a specific exogenous substance.

Metabolism- The full spectrum of biochemical reactions that take place inside a living being. Anabolism, or the accumulation of chemicals, and catabolism make up metabolism (the breakdown of substances). The breakdown of food and its conversion into energy are particularly referred to as the metabolism.

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Answer:

a. autotrophs

Explanation:

Answer:

`12

Explanation:

Answer:

Carbohydrates- Short term energy

Lipids- Long term energy

Nucleic acids- Store genetic information

Protiens- Many cellular functions

(a) Physical and chemical barriers are important in preventing and controlling inflammation. Physical barriers such as the skin and mucous membranes act as the first line of defense against invading pathogens, while chemical barriers such as antimicrobial peptides and complement proteins can directly kill or neutralize pathogens.

(b) The different types of barriers yield different inflammatory responses by limiting the ability of pathogens to invade and cause tissue damage. For example, physical barriers such as the skin can prevent entry of microorganisms, reducing the need for inflammation.

On the other hand, chemical barriers such as antimicrobial peptides can activate inflammatory pathways, leading to recruitment of immune cells to the site of infection. The effectiveness of these barriers can also vary depending on the type of pathogen and the site of infection.

Understanding the interplay between these barriers and inflammatory responses is important for developing effective strategies to prevent and treat inflammation.

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Answer:

Ecological succession is the development of species after a disaster that destroys an ecosystem. Since ecological succession increases the number of species living in an area, it also increases biodiversity. For example, areas that have been through heavy mining are usually stripped to barren rock..

Answer:

The words that complete the sentences are:

- EUKARYOTIC

- MULTIPLE

- CIRCULAR

Explanation:

Replication is the process whereby genetic material is duplicated into two identical copies. It is a key process that must occur prior to any cellular division (mitosis or meiosis). However, DNA replication occurs slightly different in eukaryote and prokaryote.

- Eukaryotic cells are cells that possess a membrane bound nucleus to house their NUMEROUS/MULTIPLE LINEAR chromosomes. On the other hand, prokaryotic cells do not have a membrane bound nucleus to house their SINGLE CIRCULAR chromosome.

- Due to the fact that linear chromosomes of eukaryotes are multiple in number, their replication occurs in MULTIPLE LOCATIONS but that of prokaryotic cells take place in a SINGLE LOCATION.

Energy flow can also be interpreted as the separation of energy from one trophic level to the next. In the closing process, there is always a withdrawal of the amount of energy through each trophic level of eating-consuming.

The process of energy flow from plants to humans or animals can occur in the food chain or the biomass pyramid.

Plants as primary producers are located at the first trophic level. Then at the second trophic level, there are herbivorous animals that eat plants. Predators that eat herbivores are the third trophic level group, and if there are or are present even larger predators, they will represent an even higher trophic level.

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the nose serves as the main entry point for air, while the sinuses provide resonance and contribute to the lightness of the skull. Both the nose and sinuses produce mucus, which helps filter, humidify, and protect the respiratory system by trapping and removing particles. The coordinated action of the mucus and cilia in the respiratory tract helps in the clearance of trapped particles and maintains a healthy respiratory system.

Answer: It’s a codependent relationship.

Explanation:

Answer:

An atheist denies the existence of God. As it is frequently said, atheists believe that it is false that God exists, or that God's existence is a speculative hypothesis of an extremely low order of probability. Yet it remains the case that such a characterization of atheism is inadequate in other ways.

Explanation:

Scale of the model: 1:10,000. To find the scale of the model, we need to compare the size of the model to the actual size of the red blood cell. Given that the diameter of the red blood cell is 0.008mm and the diameter of the model is 80mm, we can calculate the scale by dividing the diameter of the model by the diameter of the actual cell.

Scale = Model diameter / Actual cell diameter

Substituting the given values:

Scale = 80mm / 0.008mm

Simplifying the expression:

Scale = 10,000

Therefore, the scale of the model is 1:10,000.

1. Identify the diameter of the red blood cell: 0.008mm.

2. Identify the diameter of the model: 80mm.

3. Use the formula Scale = Model diameter / Actual cell diameter.

4. Substitute the values into the formula: Scale = 80mm / 0.008mm.

5. Simplify the expression to find the scale: Scale = 10,000.

6. The scale of the model is 1:10,000, indicating that the model is 10,000 times larger than the actual red blood cell.

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Answer:

Yes

Explanation:

Indeed, the best solution for maintaining biodiversity is to conserve the biodiversity of every ecosystem, since all ecosystems have benefits to humans and the earth.

Ecosystems might vary in the kind of services they render to the planet or humans in general. For example, the forest ecosystems supply humans with the necessary timber and wood for construction purposes and sequestrate carbon/produce oxygen from and to the environment respectively. Thus, the forest ecosystem plays a huge role in maintaining the air quality of the planet in addition to several other services.

The variation in the services the different ecosystems render to the human population and the planet necessitates that the biodiversity of every one of them be conserved. Prioritizing the conservation of one over the other will result in losing some of the services provided as a result of loss of biodiversity.

Answer: regulator of water supplies, recycler of raw materials, habitat for soil organisms, and. landscaping and engineering medium.

Explanation:

Answer:

Venus

Explanation:

In terms of size, average density, mass, and surface gravity, Venus is very similar to Earth. But Mars is the planet that is most similar to Earth in other ways. A Martian day is just over 24 hours, and its rotation axis is tilted by about the same amount as Earth's.

Explanation:

eyespot, also called stigma, a heavily pigmented region in certain one-celled organisms that apparently functions in light reception. The term is also applied to certain light-sensitive cells in the epidermis (skin) of some invertebrate animals (e.g., worms, starfishes). Euglena anatomy.

The eye spot of euglena is to detect the intensity of light.

Euglena is a protist that possesses the characteristics of plant and animal. It is a unicellular and microscopic organism.

Euglena possesses certain structures that serve different purposes in the cell. They include:

Therefore, the eye spot as a structure is used to detect the intensity of light.

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After Pavlov had conditioned his dogs to salivate to the bell, repeatedly presenting the bell without presenting the food would result in the process of extinction. Therefore, the answer is d. Extinction.

Pavlov's classical conditioning experiment involved pairing a neutral stimulus (a bell) with a biologically significant stimulus (food) until the neutral stimulus alone became associated with the response (salivation) that was previously only elicited by the biologically significant stimulus (food). After conditioning, the bell alone was able to elicit salivation in the dogs.

To investigate the process of extinction in classical conditioning, Pavlov repeatedly presented the bell (neutral stimulus) without presenting the food (biologically significant stimulus). Over time, the dogs learned that the bell no longer predicted the arrival of food, and the association between the bell and salivation weakened. This process of weakening of the conditioned response due to the repeated presentation of the conditioned stimulus without the unconditioned stimulus is called extinction.

In summary, extinction is the process of weakening the conditioned response by repeatedly presenting the conditioned stimulus without the unconditioned stimulus. Therefore, in Pavlov's experiment, the presentation of the bell without food resulted in extinction of the conditioned response, which was salivation in dogs.

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