Orchidectomy (removal of the testes) usually produces impotence, which is eliminated by replacement injections of

Answer:

Precambrian: 4055 million years; 88% Paleozoic: 300 million years; 7% Mesozoic: 179 million years; 4% Cenozoic: 66 million years; 1%Explanation:

Answer:Grow/cell division.

Reproduce themselves/ new cells. Hopefully this helped

Explanation:

Answer:

grows, cell division

reproduce themselves, new cells

Explanation:

Multicellular organisms tend to grow as more cells develop inside and so then it divides

Unicellular organisms make more of themselves, like duplicates, producing new cells

Hope this helps!

Answer: Blood type is the most useful characteristic for identifying a suspect in a crime from a genetics report.

Explanation:

Blood type can be a valuable piece of evidence as it can narrow down potential suspects and provide information about the possible perpetrators. Other physical characteristics such as hair color or eye color can vary widely within the population and may not be as specific or unique for identification purposes.

Momentum is related to the pressure exerted by a gas as it reflects the transfer of momentum from the gas particles to the container walls. At the atomic and molecular level, gas particles are in constant motion and collide with each other and with the container walls.

These collisions transfer momentum and create a force that results in pressure. The magnitude of pressure depends on the speed and frequency of the collisions as well as the number of gas particles. According to the ideal gas law, pressure is proportional to the number of gas particles and their average kinetic energy. Thus, as the number of gas particles or their kinetic energy increases, so does the pressure. Overall, momentum plays a crucial role in determining the pressure exerted by a gas and is intimately tied to the behavior of atoms and molecules in motion.

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Answer:

scientific consensus changed as scientists learned more about organisms.

Explanation:

The classification system for organisms has changed from seven levels to eight level of classification system because scientists learned more about organisms. This new learned information allow scientists to change the existing classification system. When the scientist find new species that may have to change classification systems in order to accommodate them and placed them accurately in the classification system.

Answer:

A. scientific consensus changed as scientists learned more about organisms.

Explanation:

Both viruses and prions are infectious agents, but prions are special in that they can spread their own misfolded structure and result in life-threatening neurological disorders.

To be more specific, prions are distinct in that they lack any genetic material, like DNA or RNA. Instead, they are merely aberrant forms of the prion protein, a typical cellular protein. A normal prion protein may take on the same misfolded structure when it comes into touch with a prion. The misfolded prion protein can serve as a template to transform more normal prion proteins into the misfolded form, allowing this process to continue.

Prions are harmful because of their capacity to spread their own distorted form. These can result in a number of neurodegenerative illnesses, including Creutzfeldt-Jakob disease and mad cow disease, as they build up in the brain. Prions, in contrast to viruses, are not eliminated by routine sterilising techniques, and there is no recognised treatment for prion illnesses.

In comparison, viruses are far more intricate structures with genetic material and frequently have a protein coat on the outside. By taking over the cell's mechanism to create additional virus particles, they invade cells. Unlike prions, viruses can be eliminated using a variety of techniques, including antiviral medications, vaccinations, and disinfectants.

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During the prophase of mitosis, the following steps take place.

Chromosomes narrow down.

Breakdown of the nuclear envelope.

To the mitotic spindle, the chromosomes adhere.

a mitotic division's initial stage. The chromosomes duplicate to create two very long, very thin strands called chromatids before prophase starts. The chromatids thicken and condense to form distinct bodies during prophase itself.

Prophase is the first stage of mitosis, which divides the duplicated genetic material present in a parent cell's nucleus into two identical daughter cells. The chromatin, or DNA and protein complex, that makes up the nucleus condenses during prophase.

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Answer:

The positioning of the cool and fern rooms on the east side of the greenhouse can be attributed to several factors, including the requirements of the plants and the availability of sunlight.

Explanation:

Sunlight: Placing the cool and fern rooms on the east side allows them to receive optimal morning sunlight. As the sun rises in the east, these rooms can capture the early morning light, which is generally gentler and less intense compared to the harsh afternoon sun. This arrangement provides a favorable light intensity and duration for the plants' growth and photosynthesis.

Temperature: The east side of a greenhouse tends to experience lower temperatures compared to the west side during the afternoon. By locating the cool room on the east side, the plants inside can benefit from the relatively cooler temperatures, which may be crucial for certain plant species that thrive in cooler environments.

Shade: Placing the fern room on the east side allows it to receive some shade from the taller structures or trees that might be present on the west side of the greenhouse. Ferns generally prefer indirect or filtered light rather than direct sunlight. The shading effect helps create a more suitable environment for ferns by reducing the intensity of sunlight and preventing potential leaf burn or dehydration.

Microclimate control: Separating the cool and fern rooms from other areas of the greenhouse, such as the warm or sun-loving plants, allows for better control of the microclimates within the different sections. The cool room may require specific temperature and humidity settings to mimic cooler climates, and keeping it separate helps maintain the desired conditions without affecting the rest of the greenhouse.

Overall, the placement of the cool and fern rooms on the east side of the greenhouse takes into account factors such as sunlight exposure, temperature preferences, shading requirements, and the need for microclimate control to create suitable environments for the plants in those rooms.

Answer:

See below

Explanation:

A. centromeric regions from mother in one cell: 23

total number of centromeric regions in one cell: 46

for every centromeric region that is inherited by the gamete, there is a 0.5 probability that it is from the mother. Hence, if all are from the mother:

0.5 ^ 23 = 1.19 x 10^(-7)

B. Heterozygous for 2000 genes means 4000 possible alleles.

2 ^ 4000 = 1.3 x 10^(1204)

C. 2 ^ 46 = 7.03 x 10^(13)

Answer: it could be the rabbit or lizard

Explanation:

Because some lizards don’t eat meat an some do

Given that Stem Bromelain has an enzymatic activity of 0.542 U/mg, and there are 20 billion bacteria in our teeth. We need to calculate how long it takes to degrade all of the biofilm created by the bacteria.Assumptions and explanations used in the calculation: Assumption: The mass of the biofilm is not given. Therefore, it is assumed that the biofilm's mass is 1 mg, as the enzymatic activity of bromelain is provided per mg. If the biofilm's mass is different, the result will be different.

We know the enzymatic activity of bromelain, which is 0.542 U/mg.We are given that the number of bacteria in our teeth is 20 billion. The biofilm is created by these bacteria. Bromelain is supposed to degrade the biofilm. Therefore, we need to calculate the mass of the biofilm. The mass of the biofilm is assumed to be 1 mg, as the enzymatic activity of bromelain is given per mg.Now we can use the given data to calculate the time required for bromelain to degrade all of the biofilms created by the bacteria.First, we need to find the total enzymatic activity required to degrade the biofilm. The mass of the biofilm is assumed to be 1 mg.Enzymatic activity of bromelain = 0.542 U/mgTotal enzymatic activity required to degrade 1 mg biofilm= 0.542 U/mg × 1 mg= 0.542 UThe total enzymatic activity required to degrade the biofilm created by the 20 billion bacteria is:Total enzymatic activity required= Enzymatic activity per bacteria × Total number of bacteria= 0.542 U/mg × 20 billion= 1.084 × 10^10 UTo find out how long it takes for bromelain to degrade all of the biofilm, we need to know the rate of degradation. The rate of degradation depends on various factors, such as temperature, pH, etc., which are not provided in the question. Therefore, it is impossible to calculate the time required for bromelain to degrade all of the biofilms created by the bacteria without knowing the rate of degradation. Thus, the answer cannot be calculated.

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Answer:

a cell

Explanation:

hope it helps

hope it helps

Answer:

Mendel's law of independent assortment states that the alleles of two (or more) different genes get sorted into gametes independently of one another. In other words, the allele a gamete receives for one gene does not influence the allele received for another gene.

Explanation:

Answer:

A a riverbed because of how many animals go in and out to drink water

Explanation:

The term used to describe animals that are harvested primarily for their fur is "fur-bearing animals."

These are animals that have thick, dense fur coats that are highly valued for their warmth, softness, and beauty. The fur industry has a long history, and fur-bearing animals have been hunted and trapped for thousands of years.

Fur-bearing animals can be found in many different habitats around the world, including arctic tundra, boreal forests, and temperate and tropical regions. Some of the most commonly harvested fur-bearing animals include minks, foxes, rabbits, beavers, otters, chinchillas, and sable.

Fur harvesting can be done through hunting, trapping, or farming. Hunting and trapping involve catching wild animals in their natural habitats, while fur farming involves raising animals in captivity specifically for their fur. Each method has its own set of ethical and environmental concerns.

The fur industry has faced criticism from animal welfare advocates who believe that fur production involves cruelty to animals. Some countries have banned the production and sale of fur, while others have imposed regulations on fur farming and harvesting practices.

In conclusion, the term used to describe animals that are harvested primarily for their fur is "fur-bearing animals." While the fur industry has a long history, it has faced increasing scrutiny in recent years due to concerns about animal welfare and sustainability.

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The genotypes of two parents for trait r is the mendelian trait in humans for tongue rolling. the allele for the ability to roll the tongue (r) is dominant over the allele for the inability to roll the tongue (r). The mother's genotype The mother is heterozygous (Rr) for the tongue-rolling trait.

There are two main types of genotypes that is  homozygous and heterozygous. If an organism is homozygous for a gene, referred that they inherit two of the same versions of the gene. If an organism has a heterozygous genotype, referred that they inherit two different versions of a gene.

Genotype referred to the genetic makeup of an organism which described about an organism's complete set of genes. It is used to refer to the  variant forms of a genes that are carried by an organism. The ability to roll the tongue is dominant over the allele for the inability to roll the tongue.

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Answer:

Earths Crust

Explanation:

Earth was made before any kind of landscape.

Valcanoes were formed after a pit of lava was filled up.

Answer:

The earths crust came first because the movement of the plates that make up the earths crust create volcanos.

Explanation:

Answer:

Explanation:

Cyanite, quartz and lucite are all part of the potassium mineral group

The study of chemicals and bonds is called chemistry.

The correct answer to the question is potassium.

According to the question, all these minerals belong to the potassium group.

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Answer:

A. increased rainfall

Explanation:

Hope this helps

Answer:

Primary succession is the colonization of species of organisms on life-less barren lands after a volcanic eruption, newly formed land, or sand dunes. Lichens and mosses are the known primary succession community of organisms that helps in developing conditions for secondary succession by breaking rocks and providing soil.

After a fair amount of time, there are new species of organisms that grow and colonize in the land and these are, and ultimately the community becomes fairly stable. A climax community is a more stable, mature community that undergoes little or no change which can live for hundreds of years on the land.

The long-term survival of species is dependent on various kind of resources that may be limited, this can be explained by the lichens and mosses that have enough amount of nutrition and resources during primary succession but as new organism comes with complex structure and competes with these lichens and mosses their number decline due to limited amount of resources.

The fully assembled ribosome in bacterial cells is described as 70S.

Ribosomes are cellular structures responsible for protein synthesis. They exist in both bacterial and eukaryotic cells, but their sizes differ. Ribosomes are characterized by their sedimentation coefficient, denoted by the letter 'S.'

In bacterial cells, the fully assembled ribosome consists of a large subunit and a small subunit, combining to form a 70S ribosome. The large subunit is approximately 50S, while the small subunit is around 30S. When these two subunits come together, they form the 70S ribosome.

The other options listed, 50S, 80S, and 30S, refer to either the individual subunits or ribosomes found in different organisms. The 80S ribosome, for example, is characteristic of eukaryotic cells rather than bacterial cells.

Therefore, the correct option is option (a)

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Explanation:

biodiversity has both economic value and ecological value within an ecosystem. ... Human activities can also threaten biodiversity. These activities include habitat destruction, poaching, pollution, and the introduction of exotic species.

Answer:

blastocyst

Explanation:

Human embryology is the study of this development during the first eight weeks after fertilization. The normal period of gestation (pregnancy) is about nine months or 40 weeks.

The germinal stage refers to the time from fertilization through the development of the early embryo until implantation is completed in the uterus. The germinal stage takes around 10 days.[3] During this stage, the zygote begins to divide, in a process called cleavage. A blastocyst is then formed and implants in the uterus. Embryogenesis continues with the next stage of gastrulation, when the three germ layers of the embryo form in a process called histogenesis, and the processes of neurulation and organogenesis follow.

In comparison to the embryo, the fetus has more recognizable external features and a more complete set of developing organs. The entire process of embryogenesis involves coordinated spatial and temporal changes in gene expression, cell growth and cellular differentiation. A nearly identical process occurs in other species, especially among chordates.

The feature least suitable for use as a homologous feature in the study of evolution is a result of convergent evolution.

Homologous features are traits that are inherited from a common ancestor. They exhibit similarity in structure and function across different species due to shared evolutionary history. These features provide valuable information for studying the evolutionary relationships between organisms.

In contrast, convergent evolution refers to the independent evolution of similar traits in unrelated species. This occurs when different species face similar environmental pressures and independently develop similar adaptations. Convergent evolution can lead to the development of analogous structures that may share similar functions but have different underlying structures and genetic origins.

Features resulting from convergent evolution are not suitable for use as homologous features because their similarities are not due to shared ancestry but rather to independent adaptations. When studying evolutionary relationships, scientists need to focus on traits that have a common origin and reflect shared ancestry, as these traits provide insights into the evolutionary history of species.

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100% have purple flowers , because the purple factor is the dominant factor.

Punnett Square is defined as the class diagram used to predict the genotype of a particular cross or breeding experiment which is named after Reginald C. Punnett, who formulated the approach in 1905. It is used by biologists to determine the likelihood of one offspring with a particular genotype.

An example of a Punnett square which shows the result of a cross between two purple flowers, each with a dominant factor and a recessive factor.

100% have purple flowers, because the purple factor is the dominant factor. So, the \(F_1\) will produce 4 Bb progeny which is purple colour in colour. This cross occur between Purple (BB) and White (bb).

Thus, 100% have purple flowers , because the purple factor is the dominant factor.

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The thyroid-stimulating hormone will be stimulated if estrogen does not activate the hypothalamus.

The hypothalamus is the part of the brain that secretes hormones to control the function of the body's organs and cells. The most important function of the hypothalamus is homeostasis, which ensures and maintains all body systems running stable.

The hypothalamus releases hormones to another part of the brain, namely the pituitary gland. This gland will then send these hormones to various other organs of the body.

Some of the hormones produced by the hypothalamus are:

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Answer:

I think it gave people more jobs and it helped stop disasters

Explanation: