In the absence of growth factor, most animal cells will stop the cell cycle at a restriction point in what stage

Answer:

The battery

Explanation:

The battery is the dependent variable because it can change based on which brand of phone.

Answer:

hope help you stay happy and safe

When the Earth moves, the angle at which sunlight hits different places on Earth at the same time of day changes because the Earth is tilted.

Earth's rotation or Earth's spin is defined as the rotation of the planet Earth around its axis as well as the change in the orientation of the axis of rotation in space. When viewed from Polaris, the north pole star, the Earth rotates in the east facing east, the Earth rotates counterclockwise.

When the heading of the particular place is towards the Sun, there is warm temperature which is called as the summer when the heading of the same place is away from the Sun, there is cold temperature which is called as the winter.

Thus, when the Earth moves, the angle at which sunlight hits different places on Earth at the same time of day changes because the Earth is tilted.

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The respiratory membrane is the diffusion barrier across which respiratory gases are swapped between the blood and the air in the alveoli is muscular layer of the capillary wall.

External respiration is the Swapping of gases with the outer environment, and occurs in the alveoli of the lungs.

Inner respiration is the exchange of gases with the interior environment, and takes place in the tissues.

The basic exchange of gases occurs due to simple diffusion.

Thus, option "C" is correct, muscular layer of the capillary wall.

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Answer:

Homozygous and heterozygous are terms that are used to describe allele pairs. Individuals carrying two identical alleles (RR or rr) are known as homozygous. While individual organisms bearing different alleles (Rr) are known as heterozygous.

Heidelbergensis is believed to have evolved from African H. erectus, also known as Homo ergaster, during the first early hominin advancements out of Africa, which are thought to have started around 2 million years ago. The one's who migrated through Europe and remained in Africa either speciated into H. heidelbergensis or underwent evolution.

Regional variations in Homo heidelbergensis eventually led to the emergence of two species of humans. Homo heidelbergensis populations in Europe gave rise to Homo neanderthalensis (the Neanderthals), whereas Homo heidelbergensis populations in Africa gave rise to our own species, Homo sapiens.

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Answer:

biology quite literally means the study of life. this means although proteins can be included in this it's not limited to just proteins

Explanation:

Neurons which carry impulses from sensory receptors in the internal organs (viscera), skin, skeletal muscles, joints, or special sensory organs are called sensory neurons.

Neurons are the nerve cells that function to transmit signals in the form of electrical signals to and from the brain. The neurons are the longest cell in human body. The structure of neuron is composed of a cell body surrounded by dendrites, a long axon and the axon terminal.

Sensory organs are those that receive signals from the outer environment. These organs are composed of sensory neurons that help them receive the stimulus. The sensory organs of the body are eyes, ears, nose, tongue and skin.

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Our sensory systems adapt after prolonged exposure to a constant stimulus in order to prioritize detecting changes in the environment rather than maintaining sensitivity to unchanging stimuli.

When we are exposed to a constant stimulus, our sensory receptors gradually become less responsive to it over time. This phenomenon is known as sensory adaptation. The primary purpose of sensory adaptation is to enhance our ability to detect and respond to changes in the environment. By reducing our sensitivity to constant stimuli, our sensory systems can focus on detecting new or different stimuli that might indicate important changes in the surroundings.

Sensory adaptation occurs at various levels of the sensory system, from the sensory receptors themselves to higher brain centers involved in processing sensory information. The process involves a decrease in the firing rate of sensory neurons and adjustments in the neural circuits responsible for transmitting and processing sensory signals. These adaptations allow our sensory systems to remain highly sensitive to changes in the environment, which is crucial for survival and efficient perception of the world around us.

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The process in which oxygen and glucose undergo a complex series of chemical reactions inside cells, releasing energy. Fermentation: The process by which cells release energy by breaking down food molecules without using oxygen

The cell nucleus directly controls the process of gene expression.

Gene expression involves the transcription of DNA into RNA, which is then translated into proteins that carry out various functions within the cell. The nucleus contains the genetic material in the form of DNA, which serves as the blueprint for the production of proteins. It regulates gene expression by controlling the transcription of specific genes, which can be influenced by various internal and external factors. Therefore, the cell nucleus plays a crucial role in the regulation and control of various cellular processes.

what is DNA?

DNA stands for Deoxyribonucleic Acid. It is a molecule that carries genetic instructions used in the development, function, and reproduction of all known living organisms and many viruses. DNA is composed of four types of nucleotides: adenine (A), guanine (G), cytosine (C), and thymine (T), which are arranged in a specific order to form a long, twisted ladder-like structure called a double helix. The sequence of these nucleotides in the DNA molecule contains the genetic code that determines the traits and characteristics of an organism. DNA is found in the nucleus of eukaryotic cells and in the cytoplasm of prokaryotic cells, and it is passed down from one generation to the next during reproduction.

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Answer:

Loss of Habitat , and loss of genetic variation

Explanation:

Answer:

C

Explanation:

I think

The correct answer is: A. was produced as a result of the recombination of recessive genes during sexual reproduction

Recombination is a procedure by way of which pieces of DNA are broken and recombined to provide new combos of alleles. This recombination process creates genetic variety at the level of genes that reflects differences within the DNA sequences of different organisms.

Recombination occurs randomly in nature as a normal occasion of meiosis and is more advantageous via the phenomenon of crossing over, in which gene sequences known as linkage groups are disrupted, resulting in a trade of segments among paired chromosomes which might be present process separation.

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Answer:

C. Student # 2 predicts that the vacuole will appear smaller and the chloroplasts and nucleus will have moved due to the cell membrane shrinking as water exits through osmosis.

Explanation:

Adding the drop of water to the slide puts the cell in a hypertonic solution and the water inside the cell will rush out of the cell to where there is less water, causing the cell to shrivel.

Approximately \(5\times 10^6 \ to\  5\times 10^9\) prokaryotic cells can live in 5 ml of fertile soil.

Prokaryotic cells are single-celled microorganisms that lack a nucleus and other membrane-bound organelles. They can be found in almost every habitat on Earth, including fertile soil, and play a significant role in biogeochemical cycles and nutrient cycling. The number of prokaryotic cells present in 5 ml of fertile soil depends on various factors, such as soil type, nutrient availability, moisture content, temperature, and pH. Generally, the number of cells present in fertile soil can range from 10^6 to 10^9 cells per gram of soil.

Assuming that the density of fertile soil is approximately 1 g/ml, we can estimate the number of prokaryotic cells presents in 5 ml of soil as follows:

Number of cells in 1 ml of soil = 10^6 to 10^9 cells/g of soil
The density of soil = 1 g/ml

Therefore, the number of cells in 5 ml of soil

= (10^6 to 10^9 cells/g of soil) x (1 g/ml) x (5 ml)

= 5x10^6 to 5x10^9 cells.

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Answer:

El híbrido va a ser esteril.

Explanation:

En la cruza entre dos especies distintas, cuando ocurre, existen distintos mecanismos de aislamiento reproductivo, que son barreras que inhiben o interrumpen el flujo génico entre especies distintas. Es decir que no habrá exito reproductivo de estas cruzas. Se trata de caracteres biológicos propios de cada especie que previenen la reproducción con otras especies.

Estos mecanismos de aislamiento reproductivo pueden ser precigóticos o postcigóticos.  

  1.Pre-copulatorios o pre-cigóticos:

  2. Post-copulatorios o cigóticos:

La mula es producto de la cruza entre dos especies distintas: una yegua (Equus ferus caballus) y un burro (Equus africanus asinus). Es un ejemplo de la accion de mecanismo poscigótico, en el cual se forma un híbrido viable esteril. Este ejemplar puede nacer, crecer y sobrevivir, pero que no puede producir gametas funcionales, por lo cual no puede reproducirse.  

The silicates are broken into several groups based on the way the silica tetrahedra are arranged.

The arrangement of the silica tetrahedra is determined by the sharing of oxygen atoms between the tetrahedra. The two main groups of silicates are the framework silicates and the sheet silicates.

In framework silicates, the silica tetrahedra are linked together in a three-dimensional network, creating a solid framework. Each tetrahedron shares all of its oxygen atoms with other tetrahedra, resulting in a highly stable structure. Examples of framework silicates include quartz and feldspar.

In sheet silicates, the silica tetrahedra are arranged in sheets or layers. Each tetrahedron shares three of its oxygen atoms with other tetrahedra, resulting in a two-dimensional structure. The layers are held together by weak forces, such as van der Waals forces or hydrogen bonding. Examples of sheet silicates include mica and clay minerals.

Other groups of silicates include chain silicates and isolated tetrahedra silicates, where the tetrahedra are arranged in chains or exist as separate units, respectively.

Overall, the classification of silicates is based on the arrangement of silica tetrahedra, which determines the physical and chemical properties of different silicate minerals.

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Answer:

1. Increase/occurrence

2. Heat

3. Warm

4. Global warming

Explanation:

Greenhouse effect is the process whereby heat is trapped by certain gases in the atmosphere called GREENHOUSE GASES e.g. carbon dioxide (CO2). Greenhouse gases have the ability to trap heat, hence, their increase in the atmosphere becomes a major concern as it starts becoming a bad occurrence.

An increase in the greenhouse gases in the atmosphere means more heat will be trapped, thereby, inducing the Earth to become WARM. This process where the Earth's temperature rises as a result of greenhouse effect is called GLOBAL WARMING.

Answer:

One of the lymphatic system's primary jobs is to collect excess fluid (particularly lymph fluid) surrounding the body's tissues and organs and return it to the bloodstream.

Explanation:

If the lymphatic system didn't drain excess fluid from the tissues, the lymph fluid would build up in the body and cause swelling. hope this helps!

Kendra wishes to build a model of a carbohydrate molecule ideally containing as many monomers as possible. She will choose set B.

A monomer is a type of molecule that has to make chemical bond with any of the molecule and can form long chain and polymer has been sequence of chain that is unspecified or unknown number of the monomers.

Monomers are considered to be smaller in size and the molecules are organic in nature that can be combined with similar the molecule to form a very large size of the molecule, or the molecule has been known as polymer.

The main example of the monomers are glucose, amino acids, ethylene, and vinyl chloride. Each monomer has been combined to form polymers in other ways.

Therefore, Kendra wishes to build a model of a carbohydrate molecule ideally containing as many monomers as possible. She will choose set B.

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comparing and contrating

Wildfires open a new seedbed that can be used for new plant growth is a correct statement.

Wildfires are an unavoidable element of many ecosystems. They are nature's technique of removing dead debris from forest floors. This permits critical nutrients to return to the soil, allowing plants and animals to start fresh. Fires are also vital in the reproduction of some plants. Certain plant species can reproduce by breaking their seeds as a result of wildfires. Wildfires create a new seedbed for the creation of new plants. To sustain healthy forest ecosystems, all wildfires must be avoided.

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The fate of the English settlers on Roanoke Island is indeed a historical mystery. In 1587, a group of English settlers, led by John White, established a colony on Roanoke Island, off the coast of present-day North Carolina. However, when John White returned to England for supplies, he was delayed due to the Anglo-Spanish War, and by the time he returned to Roanoke in 1590, the settlers had vanished.

The only clue left behind was the word "Croatoan" carved into a tree and "Cro" carved into a post. This led to speculation that the settlers may have sought refuge with the nearby Croatoan Native American tribe.

However, due to bad weather and logistical difficulties, White was unable to search further.

The ultimate fate of the Roanoke settlers remains unknown, and their disappearance has come to be known as the "Lost Colony."

Various theories have been proposed, including assimilation into Native American tribes, violent encounters, disease, or starvation. However, conclusive evidence has not been found, leaving the mystery unsolved.

The Roanoke Colony's disappearance has captivated historians and archeologists for centuries, and efforts continue to uncover the truth behind the fate of the English settlers.

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The family of red algae is diverse and includes several different families, such as Rhodomelaceae, Gelidiaceae, and Porphyridiaceae.

The species of red algae vary greatly within these families. Cyanobacteria, on the other hand, belong to the phylum Cyanobacteria and are not classified using the KPCOFGS taxonomy system. Instead, they are classified based on their morphological and physiological characteristics.

Red algae, also known as Rhodophyta, comprise a large and diverse group of algae. They are classified into different families based on their characteristics, including the structure of their thallus (body), reproductive structures, and pigments. Some common families of red algae include Rhodomelaceae, Gelidiaceae, and Porphyridiaceae.

Within these families, there are numerous species of red algae, each with its unique characteristics and habitats. Cyanobacteria, also known as blue-green algae, are a group of photosynthetic bacteria. They belong to the phylum Cyanobacteria and are not classified using the KPCOFGS taxonomy system typically used for plants and animals.

Cyanobacteria are classified based on their morphological features, such as cell shape, arrangement, and pigmentation, as well as their physiological characteristics and genetic traits. The classification of cyanobacteria is continually evolving as new information and techniques are discovered in the field of microbiology.

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Answer:

C. a decrease in the chromosome number in every generation.

Explanation:

hope it helps .

Answer:

There are no options to this question, however, the answer is:

TURBIDITY

Explanation:

Algal bloom is a term used to describe the excessive and rapid growth of algae species on a water surface. It is caused by the pollution of a water body with nutrients, in a process called EUTROPHICATION.

Asides the low oxygen effect of this algal blooming on a water body, it can also form a cloudiness on the surface of the water body. This cloudiness causes the water to be unclear in a process that is called TURBIDITY. In other words, the water that is affected by algal bloom is said to be "TURBID" and can reduce the penetration of sunlight.

Due to the greatest release of oxygen, bacteria gathered in these locations.

To grow on algae, Engelmann used bacteria that love oxygen. In the area of the red and blue light, bacteria tended to gather, indicating that more oxygen was being created there and therefore more photosynthetic activity.

Diverse algae segments are exposed to various light wavelengths when a filament of algae is lit up by light that has been transmitted through a prism. When aerobic bacteria are present, they tend to cluster in the red and blue light-illuminated regions.

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Answer: frog blood cell

Explanation:

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