Answer:
Im pretty sure D
Explanation:
The correct answer is 3. Mechanical.
Mechanical isolation is a form of prezygotic reproductive isolation that occurs when two species cannot successfully mate due to differences in their reproductive structures or mating behaviors. This incompatibility prevents the transfer of gametes (sperm and eggs) between individuals of different species, thus acting as a barrier to gene flow.
Let's consider each of the options:
1. Gametic isolation: This type of reproductive isolation occurs when the gametes of two species are incompatible, meaning they cannot successfully fertilize each other. This is not about the compatibility of reproductive structures between partners but rather about the gametes themselves being incompatible after fertilization has been attempted.
2. Temporal isolation: This form of reproductive isolation happens when two species breed at different times, preventing the exchange of gametes. It is related to the timing of reproduction rather than the compatibility of reproductive structures.
3. Mechanical isolation: This is the correct answer. It involves the physical incompatibility of reproductive organs or structures between two species, which prevents successful mating. For example, the shape or size of the reproductive organs may not align properly, or the genitalia may be so different that copulation is not possible.
4. Behavioral isolation: This type of isolation occurs when the mating behaviors or rituals of two species are so different that they do not recognize each other as potential mates. This is more about the behaviors leading up to mating rather than the physical compatibility of reproductive structures.
Therefore, mechanical isolation is the type of reproductive isolation that depends on reproductive structures being compatible between partners in breeding.
Select all the offspring phenotypes that could be produced from a BbEE x bbee cross (shown above).
black fur, red eyes
black fur, black eyes
white fur, black eyes
white fur, red eyes
Answer:
2 3
Explanation:
EDGE 2023
Terrestrial biomes are classified by the climate and their biodiversity, especially the types of primary producers. Review the climatic data displayed in this graph of the major terrestrial biomes. The tundra and the desert seem like very different biomes but they do have something in common according to the graph. Determine common features of the biome by citing evidence from the graph.
A) Both biomes receive less that 75 cm annual precipitation.
B) Both biomes have nighttime temperatures that are below freezing.
C) The primary producers of both biomes are low growing and non-woody.
D) The growth of primary producers is restricted because of poor soil quality.
Answer:
A
Explanation:
The graph only shows the average annual precipitation and the average temperature, so none of the answers are supported by the graph except for A
According to the graph, both biomes receive less than 75 cm annual precipitation (Option A).
The tundra is a biome characterized by permanently frozen soils (permafrost), extremely cold conditions, the absence of trees and little precipitation.The desert biome is characterized by very low precipitation levels (no more than 25 centimeters per year), grasses and shrubs as dominant vegetation, extremely high temperatures during the day, and low temperatures at the night.The graph only supports the statement indicating that both desert and tundra biomes have low precipitation levels.In conclusion, according to the graph, both biomes receive less than 75 cm annual precipitation (Option A).Learn more in:
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Is it possible for a brown haired(BB) parent and a red-haired(bb) parent to have a red-haired child?
No
Yes
Maybe
Answer:
Maybe
Explanation:
18. When does a population experience logistic growth?
O A. When it reaches the carrying capacity
O B. When natural predators are introduced to the population
O C. When it has access to unlimited resources
O D. When there's primary succession
Answer:A
Explanation:
What are some examples classical conditioning you have in everyday life?
How does that effect you?
Well for me, I think i'd say CAT TRAINING.
Here's an example. My newest cat is still learning how to come to the food in the kitchen, and come at times when she needs to eat even if already eaten in the morning.
So before today, I've been trying to get her to come just by placing the food down. But she doesn't give a response to it. Next I try a bell alone, and some other jingling or noise makers. Still no response of her coming to me at all. Then I tried placing the food down while ringing the bell, she's starting to understand, but still not a very good response. I assume in a few more days, she will understand that the bell/other noise means COME TO ME. That is a conditioned response i'm hoping to get soon.
HAVE A GOOD DAY!
Is electrical energy kinetic, potential, or both?
Is chemical energy kinetic, potential, or both?
Is elastic energy kinetic, potential, or both?
Is gravitational energy kinetic, potential, or both?
Is sound energy kinetic, potential or both?
Is mechanical energy kinetic, potential, or both?
Is nuclear energy kinetic, potential, or both?
Is thermal energy kinetic, potential, or both?
Is radiant (light) energy kinetic, potential, or both?
Types of energy is described below.
Explanation:
1.There are many different types of energy, which all fall into two primary forms – kinetic and potential. Energy can transform from one type to another, but it can never be destroyed or created.
2. Types of energy can be categorised into two broad categories – kinetic energy (the energy of moving objects) and potential energy (energy that is stored). These are the two basic forms of energy.
3.The different types of energy include
Thermal energy-Thermal energy is created from the vibration of atoms and molecules within substances. Radiant energy-Also known as light energy or electromagnetic energy, radiant energy is a type of kinetic energy that travels in waves. Examples include the energy from the sun, x-rays and radio waves.Chemical energy-Chemical energy is stored in the bonds of atoms and molecules – it is the energy that holds these particles together. Nuclear energy-Nuclear energy is stored in the nucleus of atoms. This energy is released when the nuclei are combined (fusion) or split apart (fission). Nuclear power plants split the nuclei of uranium atoms to produce electricity.Electrical energy-Electrical energy is the movement of electrons (the tiny particles that make up atoms, along with protons and neutrons). Electrons that move through a wire are called electricity. Lightning is another example of electrical energy.Motion energy-Motion energy – or mechanical energy – is the energy stored in objects; as objects move faster, more energy is stored. Examples of motion energy include wind, Sound energy-Sound energy is the movement of energy through substances. It moves in waves and is produced when a force makes an object or substance vibrate.Elastic energy =Elastic energy is a form of potential energy which is stored in an elastic object - such as a coiled spring or a stretched elastic bandGravitational energy-Gravitational energy is a form of potential energy. It is energy associated with gravity or gravitational forceEnergy is categorized as either kinetic or potential. Electrical, chemical, and nuclear energies are forms of potential energy, while elastic, gravitational, mechanical, and radiant energies exhibit both kinetic and potential forms. Thermal and sound energies are considered kinetic.
Explanation:Energy is classified into two main types: kinetic energy (KE) and potential energy (PE). The difference between them lies in the conditions of an object's motion and position.
Electrical energy is a form of potential energy resulting from the electrostatic attraction between charged particles.Chemical energy is stored as potential energy within chemical bonds.Elastic energy is both potential and kinetic, as it involves storing energy when materials are stretched or compressed and releasing energy as they move back to their original shape.Gravitational energy is potential when it pertains to an object's position above the ground, but it can convert to kinetic energy as the object falls.Sound energy is a form of kinetic energy that travels through mediums as sound waves.Mechanical energy includes both kinetic and potential energy; it's the sum of energy due to an object's motion and position.Nuclear energy is potential energy stored within the bonds between nucleons inside the nucleus of an atom.Thermal energy is a form of kinetic energy related to the motion of molecules within a substance.Radiant (light) energy is kinetic because light travels as photons, which are in constant motion.To summarize, while electrical, chemical, and nuclear energies are primarily potential energies, elastic, gravitational, sound, mechanical, thermal, and radiant energies can exhibit properties of both kinetic and potential energy depending on their specific conditions and interactions.
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How many diseases are created each year
Answer:
Deadly Diseases: Epidemics throughout history. Experts warn a global pandemic will halt humanity as we know it in the next 20 to 30 years.
Explanation:
Past epidemics may offer some insight into what the future holds
Animals have recently been genetically modified to produce leaner meat or offer healthier nutritional content with these benefits, what effects of biotechnology do consumers need to be aware
of?
Explanation: I would say the first option because it reduces biodiversity and impacts non-target species
learned in class
What other illness played an important role in the development of a vaccine for smallpox?
a. Measles
b. Bubonic Plague
c. Polio
d. Cow pox
e. HPV
Answer:
A.Measles
Explanation:
The origin of smallpox is unknown. Smallpox is thought to date back to the Egyptian Empire around the 3rd century BCE (Before Common Era), based on a smallpox-like rash found on three mummies. The earliest written description of a disease that clearly resembles smallpox appeared in China in the 4th century CE (Common Era). Early written descriptions also appeared in India in the 7th century and in Asia Minor in the 10th century.The smallpox vaccine was the first vaccine to be developed against a contagious disease. In 1796, the British doctor Edward Jenner demonstrated that an infection with the relatively mild cowpox virus conferred immunity against the deadly smallpox virus.
which statement best. describes the fossil record?
it is a complete record
it is an incomplete record
most fossils are older than 5. billion years
all fossils are younger than 600 years
Answer:
It is incomplete record
Explanation:
I took the quiz and got it right.
Final answer:
The fossil record is best described as an incomplete record, with fossilized species representing only a fraction of all species that have ever existed. It remains a key evidence for understanding Earth's biological history despite its incompleteness.
Explanation:
The best statement that describes the fossil record is that it is an incomplete record. Fossils are the preserved remains or traces of organisms that lived in the past, but the process of fossilization is quite rare, leaving many gaps. Even when fossils are created, finding them is not always possible, as some may be buried under extreme conditions or eroded over time. Fossilized species may represent less than 1% of all the species that have ever lived. Despite its incompleteness, the fossil record is crucial for understanding Earth's history and the evolution of life.
Grassland and Savanna Biomes Most of the animals in the Grasslands are. A.Herbivores B.Carnivores C.Omnivores
Imma assume it is herbivores, because there is a lot of grass in the grasslands, but double check
Most of the animals in Grassland and Savanna biomes are herbivores, such as zebras, giraffes, and bison, due to the abundance of grasses. Option A is correct.
The Grassland and Savanna biomes are two of the Earth's major ecosystems characterized by extensive areas dominated by grasses and scattered trees.Most of the animals found in these biomes are herbivores, such as zebras, giraffes, and wildebeests in African savannas, as well as bison and antelope in North American grasslands. These animals primarily feed on grasses and other vegetation.
There are also carnivores, such as lions, cheetahs, and hyenas, that prey on these herbivores, but the dominant group in terms of numbers and diversity are the herbivores, due to the abundance of grasses which provide a primary food source.
In summary, herbivores form the majority of animal populations in Grassland and Savanna biomes, ensuring a balanced ecosystem where plants and animals coexist.
how can the environment influence natural selection
Answer:
The organisms will evolve to fit the environment better.
Explanation:
one specific example would be tigers having stripes. The tiger went through natural selection for the entire species to have stripes, now that the tiger has stripes it can hide in the tall grass and camouflage itself from its prey so it can hunt better.
what are the 3 main mechanisms responsible for genetic variation
Answer:
Mutations – Changing the genetic composition of gametes (germline mutation) leads to changed characteristics in offspring. Meiosis – Via either crossing over (prophase I) or independent assortment (metaphase I)
independent assortment of chromosomes, crossing over, and random fertilization.
Tobacco mosaic virus (TMV) is a rod-shaped virus that affects many types of plants. Which of the following categories best describes TMV?
A
helical
B
polyhedral
C
icosahedral
D
complex
The tobacco mosaic virus is known to be helical in nature.
Tobacco Mosaic VirusThe tobacco mosaic virus is said to be helical in nature because its capsids are rod-shaped or filamentous in appearance.
The filamentous or rod-shaped capsids have a central cavity that holds the genome (usually in the form of ribonucleic acids) of the virus.
Helical viruses are different from other viruses that may be icosahedral, prolate, or complex as far as their own capsids are concerned.
The tobacco mosaic virus, therefore, typicalizes the helical viruses.
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Identify the items below that can cause illness
Answer:
cough rubing eyes biteing nails
Explanation:
Illnesses can be caused by viruses like those that cause the common cold, bacteria such as E. coli, and by eating contaminated food. An example of a disease from contaminated water is Cholera. Good hygiene practices, including hand washing, can help prevent these illnesses.
The items below that can cause illness are:
Viruses, such as those that cause the common coldBacteria, such as E. coliCoughing on a person when you are sickForgetting to wash your handsEating contaminated foodWhile water itself is essential for life and does not cause illness, contaminated water can be a source of disease. An example of a disease caused by contaminated water is Cholera. The common cold is caused by a type of pathogen known as a virus. Athlete's foot is caused by a fungus. Types of pathogens that commonly cause human diseases include bacteria, viruses, fungi, and protozoa. For instance, bacteria like Salmonella and E. coli can cause foodborne illnesses. These bacterial illnesses can often be prevented with proper food handling and hand hygiene.
The correct question is:
Identify the items below that can cause illness. Check all that apply.
A. water
B. viruses, such as those that cause the common cold
C. bacteria, such as E. coli
D. coughing on a person when you are sick
E. forgetting to wash your hands
F. eating contaminated food
1. Look at the illustration in Figure 25-4. Do you think that the bud on the side of the adult hydra
is an embryo? Why?
A. No, because budding is a type of asexual reproduction.
B. No, because budding is a type of sexual reproduction.
C. Yes, because budding is a type of asexual reproduction.
D. Yes, because budding is a type of sexual reproduction.
Answer:
A. No, because budding is a type of asexual reproduction.
Explanation:
Asexual reproduction is the process where an organism makes a copy of itself by itself. It does not require a mate to make offspring.
The offspring are genetically identical to the parent.
Budding is a type of asexual reproduction where a small outgrowth of the parent breaks off to become a new organism.
Embryo development is usually only discussed in the context of sexual reproduction, where two gametes fertilize one another and a new organism that is genetically different to either parent is formed.
Answer:
A. No, because budding is a type of asexual reproduction.
Explanation:
The buds on the side of the adult hydra is not an embryo because budding is a type of asexual reproduction.
It is sexual reproduction that produces an embryo from the fusion of gametes.
Hydra produces new ones by budding using part of its body wall. This process is simply an outgrowth from the body wall. An embryo is one of the stages of development of offspring originating from a zygote. It is begins at fertilization to the formation of body structures. Embryos are peculiar to organisms that reproduces sexually.Describe how the motion of Earth is affected by the sun. Be sure to include the direction of any force you identify and the shape of the path that results.
The effect of motion of Earth by the sun is given below.
Explanation:
1. The Earth rotates once on its axis about every 24 hours. If you were to look at Earth from the North Pole, it would be spinning counterclockwise. As the Earth rotates, observers on Earth see the Sun moving across the sky from east to west with the beginning of each new day. We often say that the Sun is "rising" or "setting", but actually it is the Earth's rotation that gives us the perception of the Sun rising up or setting over the horizon. When we look at the Moon or the stars at night, they also seem to rise in the east and set in the west. Earth's rotation is also responsible for this. As Earth turns, the Moon and stars change position in our sky.
2. Tides are the regular rising and falling of Earth's surface water in response to gravitational attraction from the Moon and Sun. The Moon's gravity causes the oceans to bulge out in the direction of the Moon. In other words, the Moon's gravity is pulling upwards on Earth's water, producing a high tide.
3.The Moon's position in its monthly orbit determines how it appears from Earth. The diagram on page 725 shows how the positions of the Moon, the Sun, and Earth affect the shapes you see in the sky. ... As the Moon moves along its orbit, sunlight begins falling on the near side. You see a thin crescent shape.
The Sun's gravity influences the Earth's motion, causing it to orbit in an elliptical path around the Sun. The direction of Earth's rotation affects the apparent motion of the sun and causes a deviation in the path of large scale movements like weather systems, known as the Coriolis effect.
Explanation:The motion of the Earth is greatly influenced by the gravitational pull from the Sun, causing the Earth to move in a consistent, elliptical path around the Sun. This elliptical orbit is referred to as the ecliptic. Viewed from above the North Pole, Earth rotates in a counterclockwise direction.
This rotation leads to a phenomenon known as the Coriolis effect. In the Northern hemisphere, this effect causes moving air and water to appear to turn right. In the Southern Hemisphere, the effect is reversed, causing motion to turn left. These effects caused by Earth's rotation impact large scale motions, such as weather patterns.
The direction of Earth's rotation also affects the Sun's apparent motion in the sky. Due to the ecliptic and Earth's tilt, the Sun seems to move north and south as the seasons change. Additionally, because of Earth's constant motion, the Sun rises about 4 minutes later each day in relation to the stars.
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How do these ocean currents affect the climate of the continents?
Answer:
D
Explanation:
Which statement about the human genome is correct
A) the human genome has been mapped
B) humans have about 21,000 genes
C) most of the DNA in human cells does not code for protein
D) all of these statements are correct
Answer:
I believe this is D
Explanation:
Answer:
Which statement about the human genome is correct?
humans have about 21,000 genes
Explanation:
Scientists confirmed the number of genes possessed by human which is about 21000
What did Charles Darwin contribute to science?
Answer:
The theory of the evolution of life on Earth. This can include embryology.
Explanation:
Hope this helps!
she gave him that - look
Answer:
sis what
Explanation:
elaborate
#11 choose the best answer
Answer:0
Explanation:
suggest some reason a plant might be categorized as weed.
Answer:
a plant can be categorized as a weed if it is growing where it is not wanted/needed
Answer:
They might be growing in the wrong place
Explanation:
Hope this helps
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For years antibiotics were prescribed by doctors to kill infection causing bacteria. Now there are bacteria which have evolved to resist antibiotics. Which is the final event that occurred during this process.
A- Group of answer choices
B- resistant organisms survived while others were killed
C- resistant organisms reproduced
D- resistant organisms occurred by mutation
non resistant organisms mutated.
Answer:
Explanation:The bacteria get resistant to antibiotics because after some times the bacterial DNA get evolved or you can say mutation occur due to which it resist the
Final answer:
The final event in the process of bacteria becoming resistant to antibiotics is that the antibiotic-resistant organisms survive and reproduce, increasing their proportion in the population.
Explanation:
The process by which bacteria have evolved to resist antibiotics can be summarized by a series of events. First, a mutation occurs in some bacteria that allows them to survive the presence of antibiotic drugs. These antibiotic-resistant bacteria have a survival advantage when antibiotics are used because the drug kills non-resistant bacteria. The final event in this process is that these resistant organisms survive and reproduce, leading to an increase in the proportion of resistant bacteria within the population. Over time, this can result in a population of bacteria that are all resistant to the antibiotic that was used.
Look at the image of a plant
Which tropism is best illustrated?
thigmotropism
positive gravitropism
hydrotropism
photoperiodism
Answer:
thigmotropism
Explanation:
plant growth in response to touch. Plant tendrils are wrapping around the stick.
Answer:
thigmotropism and phototropism
Explanation:
A lab technician is running a test on a patient’s sample that is likely infected with salmonella. The technician correctly performs PCR on the sample using primers known to identify salmonella. Then they run the PCR product on an electrophoresis gel. What is the technician likely to see on the gel if the patient does have salmonella?
bands matching the size found in known salmonella samples
bands that do not match the size found in known salmonella samples
no bands
Answer:
First one
Explanation:
Final answer:
If the patient has salmonella, the lab technician is likely to observe bands matching the size found in known Salmonella samples on the electrophoresis gel, indicating the presence of the bacteria.
Explanation:
Electrophoresis Gel Analysis for Salmonella Prediction
If the patient's sample is indeed infected with Salmonella, the lab technician would expect to see bands matching the size found in known Salmonella samples on the electrophoresis gel after running PCR. This is because PCR specifically amplifies the DNA region targeted by the primers, and if Salmonella DNA is present, its size after amplification should be consistent with known Salmonella DNA fragments. Upon visual confirmation with a gel, distinct bands of the expected size should appear, suggesting a positive identification of the bacteria in the sample.
PCR amplification results in a large number of copies of the targeted DNA segment, usually producing a single, sharp band after gel electrophoresis if the target is present. If no bands are present, this might indicate that the sample did not contain the DNA region targeted by the primers, or there could have been an error in the PCR process. Observing the correct size band confirms the technician's prediction and the presence of the pathogen.
why are identical twins rare?
Answer:
Tbh I don’t really know but I think it’s because the sperm has to fertilize one egg and then that egg separates into two, creating two IDENTICAL kids
Explanation:
Why is the cloning of Dolly the sheep important to humans?
O Animals that produce human medicines could be cloned.
O Cloned animals help us understand how bacteria reproduce.
O Animals that are cloned produce better meat.
O Cloned animals can produce more offspring.
Answer:
The correct option is A) Animals that produce human medicines could be cloned.
Explanation:
Dolly is known to be the fist organism which was cloned by nuclear transfer. Before this, organs, tissues etc had been clone but Dolly was the first organism to be cloned.
The successful cloning of Dolly provided scientists with the hope that organisms that were useful to humans could be cloned.
By cloning, we can produce more of organisms with the desired characteristics such as organisms producing a better source of medicine, meat, milk eggs etc.
Answer:
the answer is a:)
Explanation:
i just did it & i was rightttt! good luck!!
A woman buys a packet of seeds for red flowering plants. In the spring, she plants the seeds in her garden and enjoys beautiful red flowers all summer. The flowers are self-pollinating, and many of the flowers produce seeds. The woman collects these seeds and plants them in her garden the following spring. She is surprised when about one-fourth of these plants produce white flowers while the other three-fourths produce red flowers. Assuming that the seeds were all produced by self-pollination of the parental generation, which statement best explains the reason for the woman’s observations?
A. Temperatures were above average in the garden, causing only red flowers to be produced in the first year and both white and red flowers in the second year.
B. Some of the seeds were exposed to conditions that caused a change in the plant’s genes, leading to the production of white flowers instead of red flowers in plants grown from these seeds.
C. Both the white and red flower traits were present in the parental generation, but only the red trait was expressed in this generation, while both traits were expressed in the next generation.
D. Offspring acquired new genes during the crosses taking place between plants in the parental generation, and one of these genes codes for the white flowering trait.
E. Plants producing white flowers in the second generation did not receive the same essential nutrients from the soil needed to produce red flowers.
Answer:
It should be C -
Both the white and red flower traits were present in the parental generation, but only the red trait was expressed in this generation, while both traits were expressed in the next generation.
Explanation:
The reason is just like human. As an example, a family of, let's say Africa, and all of them are dark skin, then one married to a, let's say Europe, and that person is light skin. Which the offspring became a pretty dark skin. Then as the offspring grow up and have family of their own, the trait of light skin is always in the family, although it is recessive. So randomly, that light skin gene will pop-up in the generation, probably just not in this one.
I hope this helps, and I don't mean any offense to anyone.
Btw- I actually got this question right on Discovery Ed, so you could trust me.
If this helps you, please mark brainly!
Thank you!
Have a great day! :)
P.S- there's already a same exact question, which I had also answer, and I just copy the stuff from the other question to this.
In space there is no atmosphere to filter the sunlight ,so when astronauts face the sunlight or turning away from the sun it results in extreme changes of temperature. What will astronauts need to be designed in order to keep the temperature stable so that they can go to space?
It's a free response
Answer:
spacecraft and space suits have to be designed to keep the temperature stable.
Explanation: