which of the following provides an example of epistasis? group of answer choices recessive genotypes for each of two genes (aabb) results in an albino corn snake. in rabbits and many other mammals, one genotype (ee) prevents any fur color from developing. in drosophila (fruit flies), white eyes can be due to an x-linked gene or to a combination of other genes. in cacti, there are several genes for the type of spines.

It is true eukaryotic mitochondria have their own 70s ribosomes and circular DNA.

Eukaryotic mitochondria have their own 70S ribosomes and circular DNA. They come from a unique evolutionary lineage that most likely began with an old symbiotic association between a host cell and a prokaryotic ancestor. Similar to prokaryotes, mitochondria include 70S ribosomes that help them synthesize proteins.

They have this circular DNA called  mitochondrial DNA (mtDNA) which is enough to support the free living theory of mitochondria.

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Complete question - eukaryotic mitochondria have their own 70s ribosomes and circular dna - True or False.

Some form of early Homo is estimated to have evolved into Homo erectus around 1.7-2 million years ago, option B is correct.

Homo erectus is believed to have evolved around 1.7-2 million years ago based on fossil evidence and dating methods. Fossil discoveries, such as the famous Nariokotome Boy skeleton found in Kenya, provide crucial insights into the anatomy and characteristics of Homo erectus. These fossils, along with other archaeological and genetic evidence, suggest that Homo erectus was the first hominin species to exhibit significant anatomical and behavioral differences from earlier hominins.

The emergence of Homo erectus marked a significant milestone in human evolution, as this species had a larger brain size, more advanced tool-making abilities, and potentially even the ability to control fire. These developments laid the foundation for the subsequent evolution of Homo sapiens, option B is correct.

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The complete question is:

Some form of early Homo is estimated to have evolved into Homo erectus around:

A) 5-7.5 million years ago

B) 1.7-2 million years ago

C) 10,000-40,000 years ago

D) 50,000-70,000 years ago

Cancerous tumors are always malignant.

Hemoglobin: The high iron-containing protein in red blood cells (RBCs) is known as hemoglobin. This gives the blood a red color.

It has two main functions: it carries oxygen from the lungs to tissues of the body, and it carries carbon dioxide from cells back to the lungs for excretion.

Functions of hemoglobin:

Consequences of hemoglobin deficiency:

Hemoglobin deficiency reduces the blood's oxygen-carrying capacity.

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If the two flies are test crossed, Ww and Ww would indicate that the wild-type fruit fly was heterozygous.

When two normal winged flies are crossed, we get 76 normal flies and 23 vestigial flies. Ww or WW are represented by two normal wing flies. However, the ratio shows a greater number of normal wing flies that can be produced when two heterozygous individuals are crossed, because no vestigial wing flies can be produced if both individuals are homozygous dominant. So the result of a cross between two Ww and Ww would be 3/4 normal winged and 1/4 vestigial wings.

Wild type is defined as any trait that occurs naturally in more than half of the wild population. The mutant type is one that is absent from the majority of the wild population. Orange and black tigers, for example, are the wild type, while albino tigers are the mutant type.

You have a heterozygous genotype for that gene if the two versions differ. Being heterozygous for hair color, for example, means you have one allele for red hair and one allele for brown hair. The interaction of the two alleles influences which traits are expressed.

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After five generations with no cell death, there will be 1600 cells present.

If a culture starts with 50 cells, after five generations with no cell death, there will be 1,600 cells present.

In each generation, the number of cells doubles, as each cell divides into two new cells. Therefore, after one generation, there will be 100 cells (50 x 2), after two generations there will be 200 cells (100 x 2), after three generations there will be 400 cells (200 x 2), after four generations there will be 800 cells (400 x 2), and after five generations there will be 1,600 cells (800 x 2).

So, starting with 50 cells, after five generations with no cell death, the culture will have 1,600 cells.

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Answer:

D. to remove a host cell's DNA

Explanation:

I hope that this helped you :D

Answer:

I got it right... this is a first choice D) to remove a host cell's DNA

Explanation:

thank you!

give me a mark for brainly

Answer:

chicken

Explanation:

human and rabbit pattern are identical while chicken is different

Most penicillin resistant bacteria produce enzymes called penicillinases that hydrolyze the β-lactam ring of penicillin, rendering it inactive.

This allows the bacteria to survive in the presence of penicillin and continue to reproduce.

In order to combat penicillin-resistant bacteria, alternative antibiotics that are not susceptible to β-lactamase hydrolysis must be used.

These include cephalosporins, carbapenems, and monobactams.

Additionally, efforts are being made to develop new antibiotics that can target and kill penicillin-resistant bacteria.

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Penicillin-resistant bacteria produce enzymes called penicillinases, which function to hydrolyze the β-lactam ring in penicillin. This process inactivates the antibiotic, allowing the bacteria to survive and continue to grow despite the presence of penicillin.

Most penicillin resistant bacteria produce enzymes called penicillinases that hydrolyze the β-lactam ring of penicillin, rendering it inactive. These enzymes are also known as beta-lactamases and can break down other beta-lactam antibiotics as well, such as cephalosporins and carbapenems. In order to combat this resistance, researchers have developed beta-lactamase inhibitors that can be used in combination with these antibiotics to increase their effectiveness. Additionally, new classes of antibiotics are being developed that are not susceptible to beta-lactamases.

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The primary functions of whales include feeding, reproduction, communication, and migration.

Whales are primarily filter feeders or predators, depending on the species.

Filter-feeding whales, such as baleen whales, have baleen plates in their mouths that allow them to filter out small prey, such as krill or small fish, from large volumes of water.

Predatory whales, such as toothed whales, hunt and feed on various marine organisms, including fish, squid, and marine mammals.

Reproduction is another important function for whales. Most whale species have a gestation period of several months, with females giving birth to a single calf.

The calves are nursed with milk from their mothers and rely on their care for a period of time until they become independent.

Communication is vital for whales, as they rely on vocalizations to communicate with other members of their pod.

Whales produce a variety of sounds, including songs, clicks, and whistles, which serve purposes such as mating, social interactions, and navigation.

Migration is a common behavior observed in many whale species. Whales undertake long-distance migrations, often covering thousands of kilometers, to reach feeding grounds in nutrient-rich waters or to reproduce in specific breeding areas.

These migrations are driven by seasonal changes in food availability and environmental conditions.

In summary, the primary functions of whales encompass feeding, reproduction, communication, and migration, all of which are essential for their survival and successful adaptation to their marine environments.

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During the first three years of primary succession the rate of rate carbon storage changes by slowing down the rate of carbon dioxide accumulation in the atmosphere.

Primary succession is a type of ecological succession in which plants and animals first colonize in a lifeless habitat. the colonies which enter first are known as pioneer colonies and as time passes new colonies are formed.

Primary succession is an ecological succession where a newly formed area is inhabited by a community or a species where the vegetation is destroyed by some barren or natural disaster.

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The earliest (oldest) chapter of geologic time is (D) Precambrian.

The Precambrian is the earliest and longest chapter of geologic time. It spans from the formation of the Earth, approximately 4.6 billion years ago, to the beginning of the Paleozoic era, around 541 million years ago.

The Precambrian encompasses about 88% of Earth's history and is divided into several eons, including the Hadean, Archean, and Proterozoic eons. During this time, significant events such as the formation of the Earth's crust, the development of the atmosphere, and the emergence of early life forms took place.

The Cenozoic, Mesozoic, and Paleozoic eras came after the Precambrian.

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The third option i the correct one: "if the heart rate is above target zone, move to a less cardio-intensive activity". The other options tend to surpass heart target zone as they imply more effort. While the third, suggest to slow motion, without being completely static, in order to allow the heart rate to return to the target zone.

Each cell is made up of a cell wall, a central nucleus, a thin coating of cytoplasm, and a nucleus. The cells being studied are those of a plant since they all have cell walls and just a huge, noticeable vacuole.

One of the chemicals most frequently employed in traditional techniques for microscopic fungus analysis is lactophenol blue. The fungal cytoplasm is dyed, giving a vivid blue background, and utilized to make semipermanent & permanent microscopic sections.

The mixture consists of three ingredients: phenol, which will kill any living things; lactic acid, which will preserve fungal structures; and cotton blue, which will stain the chitin in the cell walls of the fungi.

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Metabolism, respiration, and digestion all have the common function of converting energy within the body.

Metabolism is the process of converting food into energy that can be used by the body. Respiration is the process of converting oxygen into energy that can be used by the body.

Digestion is the process of breaking down food into smaller molecules that can be used by the body for energy. All three of these processes are essential for maintaining the body's energy levels and ensuring that the body is able to function properly.

Without metabolism, respiration, and digestion, the body would not be able to convert food and oxygen into energy, and the body would not be able to function properly.

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Human activities have a significant impact on biodiversity. The term biodiversity refers to the number of different species of plants and animals in an ecosystem. Many human activities are responsible for biodiversity loss, including deforestation, pollution, and climate change.

The following are some of the human activities that could impact biodiversity:

Deforestation: Deforestation is one of the leading causes of biodiversity loss. It occurs when forests are cleared for agriculture, logging, and human settlement. When forests are cleared, many species of plants and animals lose their natural habitat. This can result in the extinction of many species.

Pollution: Pollution is another major cause of biodiversity loss. Pollution can come from many sources, including factories, vehicles, and agriculture. It can have a direct impact on plants and animals, killing them or causing them to become sick. It can also indirectly impact biodiversity by altering the environment, making it less suitable for certain species.

Climate change: Climate change is one of the most significant threats to biodiversity. As the climate changes, many species of plants and animals may not be able to adapt quickly enough to survive. This could result in the extinction of many species.

Other human activities that could impact biodiversity include overfishing, hunting and poaching, and the introduction of non-native species. To protect biodiversity, it is essential to take steps to reduce the impact of these human activities. This can include reducing carbon emissions to slow down climate change, protecting natural habitats, and reducing pollution levels.

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Answer:D

Explanation:

Answer:

Yes, COVID-19 is spread through respiratory droplets, which typically travel about three to six feet and settle on surfaces, where they can live for a few hours up to several days, according to the World Health Organization. There is a risk of catching the disease by inhaling those particles, but there is a more significant risk of getting it by touching surfaces, such as desks, handrails, or doorknobs, where those droplets may have settled.

“The disease transmission goes from a cough or sneeze to a surface to your hand to your face, and that’s how people get infected,” said Paul Biddinger, director of the Emergency Preparedness Research, Evaluation, and Practice Program, Harvard T.H. Chan School of Public Health. “Good hand washing really matters. If people cough or sneeze into their elbow, that limits the spread of respiratory secretions.

Answer:

interbreeding population

Explanation:

please give brainlest need 1

Answer:

In mine own answer, I think light is a source people use to see in the dark or for other reasons it's like something we need in life. Without light how would we live? Where does light come from? I feel like people ask this most of the time. How do we know what light is? All we probably know is that it's a source of light coming from some sort of powerful energy. So basically, light is a type of electromagnetic radiation that allows people to see more clearly in the dark.

Explanation:

Hope this helps!

Answer:

Tubercle: allows tendons to attach to bone

Foramen: Allows blood vessels and nerves to travel through bone.

Fossa: Allows to bones to form a joint.

Explanation:

The tubercle or tuberosity in the human seletal system, is a protrusion that allows for attachment of skeletal muscles. The muscles attach by tendons, where the enthesis is the connective tissue between the tendon and bone.

Foramina inside the body of humans and other animals typically allow muscles, nerves, arteries, veins, or other structures to connect one part of the body with another.

Answer:

see image below

Explanation:

The initial outcome of decreasing the number of photosynthetic organisms on earth with no change in the number of organisms using cellular respiration would be a. carbon dioxide levels would increase

Photosynthetic organisms, such as green plants and algae, are those that transform light energy into organic molecules using photosynthesis. They are the primary producers in almost all terrestrial and aquatic ecosystems, generating the basic food source for nearly all animals, including humans. The organisms that undergo cellular respiration, on the other hand, are animals, fungi, and other bacteria that respire organic substances, such as sugars, to acquire energy for their metabolic processes. They are consumers that depend on producers to survive.

Carbon dioxide \((CO_{2} )\) is produced during the respiration process. The more the number of organisms using cellular respiration, the greater the amount of \((CO_{2} )\) they will release into the environment. Because there is no change in the number of organisms using cellular respiration, a decrease in photosynthetic organisms would result in an increase in \((CO_{2} )\). This is because there would be fewer producers using \((CO_{2} )\) and more consumers respiring \((CO_{2} )\), resulting in an overall increase in the atmospheric \((CO_{2} )\) concentration.

As a result, decreasing the number of photosynthetic organisms on earth with no change in the number of organisms using cellular respiration would cause carbon dioxide levels to rise. Therefore, option A is the correct answer.

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Answer: The independent variable is the different amount of water. The correct option is A.

Explanation:

A variable can represent age, a person, or an entity that can be measured. In statistics, it is simply defined as an attribute of an object to be investigated. There are different types of variables these includes:

--> Dependent variable and

--> Independent variable.

Dependent variables are simply the variables that are affected by the changes that occurs in the experiment. From the experiment they should include:

--> the height of the plant,

--> the size of the plant,

--> the number of leaves

---> if the plant survived or not (dead).

Independent variable are the variables that are changed in the experiment. A good example from the pea plant experiment is WATER. It is the aspect that is used to alter the dependent variable which is the height of the pea plant. I hope this helps, thanks!

waterlogging process adds water until the water table rises and envelops the deep roots of plants, resulting in a loss of productivity and ultimately killing them.

Soil that has been saturated with water is said to be waterlogged.   Waterlogging is, however, primarily caused by man-made factors like deforestation and poor upkeep of watersheds; developmental activities such as the construction of roads, bridges, railway lines, and buildings resulting in the choking of natural drainage; hydraulic pressure of water from upper irrigated areas resulting in the clogging of natural drainage; and the presence of microbial life. Plant roots essentially sink as a result of the soil's saturation leaving no air gaps. Inherently poorly drained soils or compacted, heavy soils frequently experience waterlogging.One of the primary abiotic stressors experienced by plants is waterlogging. During waterlogging, the inhibition of aerobic respiration hinders growth and a variety of developmental processes, including seed germination, vegetative growth, and subsequent reproductive growth.

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Answer:

the human survives

Explanation:

Answer:c

Explanation:trust me

The diagram that demonstrates how crossing-over contributes to genetic variety during meiosis is diagram C.

In conclusion, the diagram that demonstrates how crossing-over contributes to genetic variety during meiosis is diagram C.

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Answer:

whole numbers

Explanation:

Meristic traits are referred to as traits that are countable, hence the phenotypes are described by whole numbers instead of irrational, prime, complex or imaginary numbers. Meristics traits are usually associated with fishes, it is used to characterize different known species of fish or can also be employed in identifying unknown fish species. Meristic studies are mostly done on dead fishes than on living fishes

An example of a countable trait in fishes is the number of gill rakers. The identification of the number of gill rakers can be used in identifying the specie of fish.