Answer:
1. scientific method
2. two
3. independent variable
what is the result of the fertilization of an egg?
"The result of fertilization is a cell (zygote) capable of undergoing cell division to form a new individual. The fusion of two gametes initiates several reactions in the egg. ... The most important result of fertilization is egg activation, which allows the egg to undergo cell division."
The result of the fertilization of an egg is the formation of a zygote.
Fertilization is the process by which a sperm cell from the male combines with an egg cell from the female, resulting in the fusion of their genetic material. This fusion forms a single cell called a zygote, which contains the complete set of chromosomes (half from the father and half from the mother) that will eventually develop into a new individual.
The zygote undergoes rapid cell divisions through the process of mitosis, leading to the formation of an embryo, which eventually develops into a fetus and, ultimately, a new organism. Fertilization is a crucial step in s.e.x.u.a.l reproduction and the beginning of the life cycle of most multicellular organisms.
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Plants can reproduce
A. constantly. B. only by cutting or budding. C. sexually and asexually. D. only using pollination.
Answer: C. sexually and asexually.
Explanation:
Plants are the eukaryotic organisms which can reproduce by asexual as well as sexual modes of reproduction. In asexual reproduction the plant reproduce by vegetative propagation in which a part of a plant gives the birth to numerous plantlets. In sexual reproduction the plant reproduce by fertilization of male and female gametes that are pollen and eggs to form seeds. These seeds germinate to give birth to new plants.
Certain species of fish are unsafe to consume in high quantities because these fish
A. ingest other fish that are poisonous to humans.
B. have high levels of metals in them from cancer-causing pesticides.
C. are endangered species.
D. contain vitamins that aren't water-soluble and can cause toxicity.
Please don't guess, try to give the correct answer
Answer:
A. ingest other fish that are poisonous to humans.
Explanation:
In a food chain a primary consumers eats the producer, a secondary consumer eats the primary consumer and then the tertiary consumer eats the secondary consumer. The level of poison will increase as it goes down the food chain so the tertiary consumer will have the highest amount of toxins in it.
What is northern end of earth axis called
hope this helps. If you don't know an answer what I do is google it
i think the north pole (?)
Is zebra stripes a genotype or a phenotype
Answer:
Phenotype
Explanation:
Final answer:
Zebra stripes are an example of a phenotype, the observable characteristic, which is determined by the zebra's genetic makeup or genotype. The genotype is the set of genes responsible for a trait, while the phenotype is the physical expression of that trait.
Explanation:
The question of whether zebra stripes are a genotype or a phenotype deals with fundamental concepts of genetics. In essence, a genotype is the set of genes in our DNA which is responsible for a particular trait, while a phenotype is the physical expression, or characteristics, of that trait. Zebra stripes are an example of a phenotype because they are the visible expression of the genetic information contained within the zebra's DNA. Genotypes determine what traits are possible, and the environment can influence the expression of these traits, resulting in the observed phenotype.
Another interesting aspect involves the inherited nature of these stripes. The specific pattern of stripes a zebra has is determined by its genetic makeup or genotype, but the stripes we see are its phenotype. It's worth noting that while genotypes can influence phenotypes directly, environmental factors can also impact the expression of a phenotype, albeit this is more relevant to other traits than to the fixed genetic patterns such as zebra stripes.
Select the best answer for the question.
20. Your classmate is trying to determine the rate of photosynthesis for a fern plant growing in his or her backyard.
Your classmate wants to set it up in a way for it to have a high photosynthesis rate. Which of the following setups has
the highest photosynthesis rate?
O A. Low intensity of light, medium levels of carbon dioxide, low temperature level
B. High intensity of light, low levels of carbon dioxide, high temperature level
O C. Medium intensity of light, low levels of carbon dioxide, extremely high temperature level
O D. High intensity of light, high levels of carbon dioxide, moderate temperature level
Answer:D
Explanation:
Because the plant would get alot of light
The plant needs carbon dioxide to live and moderate temp because its not to hot and not to cold
Answer:
D. High intensity of light, high levels of carbon dioxide, moderate temperature level
Explanation:
Factors Affecting the Rate of PhotosynthesisThe rate at which photosynthesis occurs, or whether it can occur at all, is highly dependent on the environment of the photosynthetic organism. Three of the most important determinants of the rate of photosynthesis are as follows:
1. Light intensity
2. Amount of carbon dioxide present
3. Temperature
1. Light intensity is important. As the intensity of light increases, the rate of photosynthesis will gradually increase as well. The photosynthetic rate will continue increasing in relation to the intensity of light until it reaches a peak. Once the photosynthetic rate peaks, photosynthesis can't go any faster regardless of any increase in the intensity of light. If the intensity of light decreases, photosynthesis will also decrease.
2. The amount of carbon dioxide present can also influence the rate of photosynthesis. Like the relationship between light intensity and photosynthetic rate, more carbon dioxide in the environment allows for a faster rate of photosynthesis. As the amount of carbon dioxide increases, the photosynthetic rate increases as well. Once the rate of photosynthesis reaches its peak, however, further increases in carbon dioxide levels are irrelevant, as photosynthesis can't proceed any faster.
3. Temperature is also an important factor in photosynthetic rate. Photosynthesis proceeds faster at higher temperatures. However, if the temperature becomes too high, the rate of photosynthesis will decline steeply.
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In the cattle allele for cloven hooves (H) is dominant over the allele for mule foot hooves (h). The phenotype for each trait is shown in the picture below. What is the probability of cloven hooves in the offspring of parents that are heterozygous for the trait
Answer:
75 %
Explanation:
If we take the genotype of both parents who are both heterozygous, the resulting cross would be:
Hh x Hh
Punnett square:
H h
H HH Hh
h Hh hh
As you can see thre are 3 possible genotypes and 2 phentypes:
HH 1 Cloven hooves
Hh 2 Cloven hooves
hh 1 Mule hooves
Because cloven hooves is dominant, it will be expressed even with the presence of the recessive allele.
So the probability is 3 out 4 or 75%
Answer:
25%
Explanation:
A 2 kg book is sitting on a table. A 10 N force is pulling it to the right. A 3 N force is pulling to the left. What is the Net Force acting on the book? A. 2 N down B. 7 N to the right C. 13 N to the right D. 15 N to the right
Answer:B..7 to the right
Explanation:
10-3=7N
Greater force of 10 means the book will move to the right.
what is the descriptive data in an experiment
Answer:
Descriptive Statistics. Descriptive statistics are numbers that are used to summarize and describe data. The word "data" refers to the information that has been collected from an experiment, a survey, a historical record, etc.
Explanation:
A fossil most likely be found in which rock type?
Foliated rock
Intrusive rock
Clastic rock
Nonfoliated rock
Answer:
hmm
Explanation:
what will most likely happen if the population of poison dart frogs drops due to a viris
Answer:
The population of the dart frogs drop.
Explanation:
The population of the dart frogs, and other species that eat the dart frogs will drop. The dart frogs will have a virus, but soon the other animals who eat the dart frogs will drop too because their food is going down.
Answer:
There will be an environmental imbalance.
Explanation:
If the poisonous toad population falls due to a virus, an environmental imbalance is likely to occur. The population of insects that are consumed by this type of frog would rise, being able to turn a plague in the environment and can bring problems to the human being. Similarly, animals that feed on this toad would have difficulty finding food, causing problems for the species and possibly the environment.
Match the air masses with their corresponding characteristics.
continental tropical
maritime tropical
continental polar
maritime polar
continental arctic
cold and dry =
cold and moist =
warm and moist =
hot and dry =
very cold and dry =
eserved =
Answer:
1 - 4
2 - 3
3 - 1
4 - 2
5 - 1
Explanation:
In case of continental tropical region, due to its location at the tropics, the air that blows here are usually hot and relatively dry.In case of maritime tropical region, the air blows are warm enough and contains some water in it.In continental polar and continental arctic, due to its location at the poles, the air here is dry and cold because of its low temperature.In case of maritime polar, the air here is moist enough and sufficiently coolAnswer:
cold and dry = continental polar
cold and moist = maritime polar
warm and moist = maritime tropical
hot and dry = continental tropical
very cold and dry = continental arctic
Explanation:
1)Plants that live in deserts are adapted to constant water stress?why?
Answer:
Due to constant heat and a lot of water sources plants must retain the water the its able to gain from rain or the soil its in.
Plants that live in deserts are adapted to constant water stress by using hydrophilic colloids to increase the water potential of their tissues.
Why plants that live in deserts are adapted to constant water stress?Desert plants have adapted their roots, stems, and leaves to store more water and decrease their loss. The ability to stay hydrated helps desert plants grow healthy in extremely hot or cold environments. Still, there are several threats to the desert and Antarctica's plants, including erosion, global warming, and human involvement.Examples of adaptation in desert plants are large fleshy stems to save water thick waxy skin to reduce the loss of water and reflect heat to decrease the water loss and the presence of spiky and shiny leaves.To know more about desert plants, refer to: https://brainly.com/question/2766357
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why is so little of Earths surface found far above sea levels
Hello! :)
The eroded material finds its way to the bottom of oceans because of gravity (from... According to the hypsometric curve (plot between elevation and % of earth's surface), only about 29% of Earth's surface is above the mean sea level, rest 71% has an elevation less than mean sea level.
Hope this helped and I hope I answered in time!
~ Destiny ^_^
Final answer:
The structure of Earth's crust is such that there are high plateaus for continents and deep ocean basins, contributing to why little of Earth’s surface is far above sea levels. Geological processes such as plate tectonics have shaped mountains and plains mainly on continents, which cover less of Earth's surface compared to oceans. The distribution of mass and elevation is also influenced by gravitational variations.
Explanation:
So little of Earth's surface is found far above sea levels because of the way our planet's crust is structured. The surface of the Earth consists of high plateaus, which make up the continents, averaging around 2,750 feet (840 meters) above sea level, and the ocean basins, averaging 12,100 feet (3,700 meters) below sea level. The continents and their submerged continental shelves would appear as gigantic plateaus with steep slopes down to the deep ocean basins if you looked at Earth with the water removed.
Various geological processes such as plate tectonics and erosion contribute to the formation of Earth's topography. Mountains, canyons, and plains are shaped by these forces and are found mainly on continents, which cover a smaller portion of Earth's surface. In contrast, the vast ocean basins take up the majority of the surface area, leading to the fact that much less land exists far above sea level. Furthermore, the mass and relative impact of Earth's materials influence the gravitational pull at different points on the planet's surface, contributing to the differing elevations.
A change in the allele frequency of a population over time is called
Evolution is the change in allele frequency of a population over time.
Explanation:Evolution, in the context of biology and population genetics, refers to the change in allele frequencies within a population over successive generations. This change is a fundamental process that underlies the diversity of life on Earth.
Specifically, evolution is defined as a change in the frequency of alleles, which are different versions of a gene, within a population. This change reflects how the proportion of a particular allele within the population shifts relative to all the other alleles of the same gene that are present. These shifts in allele frequencies can occur due to various mechanisms, including natural selection, genetic drift, mutation, migration, and more.
Understanding the dynamics of allele frequency changes over time is central to the study of evolution and how species adapt to their environments and diversify.
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Choose all the answers that apply. Plants _____.
create food from carbon dioxide and water
need nitrogen compounds to make proteins
use oxygen to make food during photosynthesis
release water into the air through transpiration
release oxygen as a waste product of photosynthesis
Answer:
All of the above
Explanation:
Plants do photosynthesis, which creates food. They need nutrients such as nitrogen from the soil. They undergo transpiration to move water throughout the plant until its released
What factor contributed to the near extinction of the sea otter?
Answer: oil spills, shark attacks, conflict with humans, Pollution and habitat degration.
Explanation: all of these almost cause the sea otter population to die out completely hope this helps u out :)
The near extinction of sea otters was mainly due to increased predation by killer whales, which shifted their diet because of overfishing, habitat loss, and climate changes that affected their usual prey. Over-hunting history and subsequent ecological impacts like kelp forest destruction also played a role in the sea otters' decline.
The factor that contributed to the near extinction of the sea otter was a complex chain of ecological interactions, which included increased predation from killer whales. This shift in the whale's diet occurred as their preferred prey, Stellar sea lions and Harbor seals, declined due to overfishing of their food sources, higher ocean temperatures, and habitat loss. The reduction in sea otter populations caused a ripple effect, leading to the overpopulation of sea urchins and the subsequent destruction of kelp beds, which are essential for marine biodiversity.
Another significant factor was over-hunting of sea otters during the 18th and 19th centuries, which drastically reduced their numbers. This loss of a key predator in the ecosystem allowed sea urchin numbers to increase uncontrollably, resulting in the depletion of the kelp forests. It was the legal protection of sea otters in the 20th century that facilitated partial recovery of the ecosystem.
Furthermore, climate changes such as periods of glaciation followed by warming, as well as speculative causes like gamma-ray bursts from supernovae, have been suggested as contributing factors to historical extinction events related to marine species, illustrating the complexity of ecosystem changes and their impact on species like the sea otter.
The rearrangement of genetic information so that offspring can inherit new genetic combinations is called A. Gene editing. B.replication. C.gene expression. D. recombination
Answer: D; recombination
Explanation:
Answer:
D. Recombination
Explanation:
Recombination is the process of production of new gene combination in offspring. This makes them have genetic variations. Recombination occurs through crossing over during pachytene of prophase I of meiosis I. Exchange of genetic material between non-sister chromatids of homologous chromosomes forms new gene combinations.
Barnacles and whales have a commensalistic relationship in which barnacles benefit. What would most likely happen to the whale population if the barnacle population decreased?
Answer:
There will be no impact on the whale’s population.
Explanation:
Barnacles and whales have a commensalistic relationship which is a kind of symbiotic relationship. In this kind of symbiotic relationship, two species live in association with each other where one species gets the benefit of this relationship while the other is neither harmed nor benefited.
In the case of barnacles and whales, barnacles are the species which gets benefited from this relationship as they attach to the belly or back of a whale’s body and then feed on the microorganisms while whales are neither befitted nor harmed by this association. Thus, if barnacles population decreases there would be no impact on the whale’s population.
Answer:
stay the same
Explanation:
im on edge lol
Out of Aerobic and Anaerobic Respiration which process makes the most ATP for the cell? What is the difference between the two? Name the step of each.
1, aerobic respiration is the most. aerobic res 36/38 ATp produce and anaerobic res 2ATp
Which term do biologist use to describe the number of individuals a species requires to reproduce successfully and prevent it from going extinct
Minimum viable population is the term that biologists use to describe the number of individuals a species requires to reproduce successfully and prevent it from going extinct. Minimum viable population is the minimum number of discrete organism required to reproduce between these organisms in the species and maintain that species from going extinct.
If the minimum viable population is maintained, then the species is capable of reproducing but has to compete with other organism when the limiting factor plays its role.
The most recent major ice age in North America extended as far south as _____.
Minnesota and Wisconsin
Nebraska and Iowa
New Mexico and Oklahoma
Texas and Florida
Answer:
Nebraska and Iowa.
The diploid chromosomal number of a cat is 38. If one of the homologous chromosome pairs does not separate during Meiosis I, how many chromosomes can be found in the gametes?
Answer:
25 and 21
Explanation:
if a homologous pair does not separate, then the homologous pair (when the spindle fibers are dragging it over to the other pole), then that chromosomes DNA will be the exact same as the paternal and maternals' DNA. During Meiosis I, there is the stage where the homologous pairs are lined up and pulled apart (where an exchange tends to happen), but if there pair doesn't mix, then the exact same DNA is duplicated, and thus, the same traits can be found in the daughter cell. If you are talking about an entire homologous pair being pulled over to one side of the nucleus, depriving the other side of a chromosomal pair, the daughter cells would then have 21 chromosomes, and the other one would have 25 chromosomes. The gametes, similarly, would have 21 chromosomes and 25 chromosomes.
25 and 21 chromosomes can be found in the gametes.
How many chromosomes can be found in the gametes?If the homologous pair does not separate, then the homologous pair when the spindle fibers are pulling it to the other pole will have the same chromosome DNA as the paternal and maternal DNA.
Therefore, during meiosis I, when there is a phase where the homologous pairs which line up and separate are where an exchange occurs, but if the pair does not match, the exact same DNA is replicated, so, the same characteristics can be found in the daughter cell.
If we are talking about a complete homologous pair on one side of the nucleus, while a chromosomal pair is being deprived on the other side, then the daughter cells will have 21 chromosomes, and the other will have 25 chromosomes. The gametes, similarly, would have 21 chromosomes and 25 chromosomes.
Thus, 25 and 21 chromosomes can be found in the gametes.
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The arrows in the chart above represent the movement of carbon between four reservoirs: the ocean, plants, fossil fuels, and the atmosphere. The numbers in the blue boxes show the gigatons of carbon moving each year. More carbon is moving into the vegetation for photosynthesis than is moving out to the atmosphere via respiration. This means that the vegetation reservoir is a carbon sink, taking in more carbon from the atmosphere than it is releasing to the atmosphere. A carbon source is the opposite. A reservoir that behaves as a carbon source releases more carbon to the atmosphere than it takes in.
Consider the statements listed here. Do they accurately describe potential changes in the model? Choose all that are correct:
1 - Deforestation would result in a decrease in the carbon sink.
2- Increased use of alternative energy sources such as solar and wind energy would 3 3 - result in a decrease in released or sourced carbon.
4 - If we consider non-industrialized countries, the model would remain the same.
5 - If global warming continues, we would expect a change in the amount of carbon found in the ocean reservoir.
6 - Combustion of fossil fuels acts as a carbon sink.
7 - All carbon in the atmosphere is made by humans.
Answer: 1, 2, and 4
Explanation: I know I'm REALLY late, but maybe future people will look at this and need the actual answer. I mean, look at me now. I tried looking at this years after it was asked. Anyways, it's 1, 2, and 4 because I had the answer key
Statements 1, 2, and 5 correctly describe potential changes in the carbon cycle model. Statement 4 could also be correct depending on the specific context, while statements 6 and 7 are incorrect.
Explanation:1 - Deforestation indeed results in a decrease in the carbon sink because it reduces the amount of vegetation that can absorb carbon dioxide during photosynthesis. Hence, this statement is correct.
2 - Increased use of alternative energy sources like solar and wind energy would likely reduce the amount of carbon released into the atmosphere because these sources do not involve the combustion of fossil fuels. This statement is also correct.
4 - The model would not necessarily remain the same for non-industrialized countries because they rely less on fossil fuels and more on natural resources, potentially impacting the carbon cycle differently.
5 - With global warming, it may be expected that the amount of carbon found in the ocean reservoir would change due to alterations in temperature, salinity, and circulation patterns. So, this statement could well be correct.
6 - The combustion of fossil fuels acts as a carbon source, not a sink, because it releases more carbon into the atmosphere. This statement is incorrect.
7 - Not all carbon in the atmosphere is made by humans. Much of it is natural, resulting from activities like respiration and volcanic eruptions. Hence, this statement is incorrect.
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List the three function of an arthropod exoskeleton
Answer:
protection, support, and muscle attachment
Explanation:
hope this helps!
The three functions of an arthropod exoskeleton are protection, support, and prevention of water loss.
Explanation:The three functions of an arthropod exoskeleton are:
Protection: The exoskeleton provides a hard and rigid outer covering that protects the internal organs and soft tissues of the arthropod from injury and predation.Support: The exoskeleton serves as a framework that supports the body and allows for movement. Muscles attach to the exoskeleton, enabling arthropods to move their limbs and carry out various actions.Prevention of Water Loss: The exoskeleton is impermeable to water, preventing excessive loss of body water through evaporation.Learn more about Arthropod Exoskeleton here:https://brainly.com/question/32411368
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Which of the following is a requirement for exponential growth of a population?
Answer:
ideal conditions with unlimited resources
The offspring of two koalas develops a genetic disease. When scientists studied the parents’ DNA, they found that both parents carried harmful recessive genes passed down from the exact same lineage. Which process contributed to the offspring’s genetic disorder? A. biomagnification B. eutrophication C. inbreeding D. predation
Answer:
C. Inbreeding
Explanation:
It says that the parents' recessive gene came from the exact same lineage, meaning they are related. The continued inbreeding made the recessive gene more popular.
Answer:
C. inbreeding
Explanation:
Inbreeding is mating between the individuals which are closely related. Because of inbreeding, heterozygosity is reduced while homozygosity is increased in a population. Because of inbreeding a deleterious or recessive trait becomes more popular in a population. This condition is also known as inbreeding depression. Since the two individuals are closely related so their lineage also remains the same.
Which best describes the negative impact of human water use? Food can be produced in dry areas. Increased runoff carries fertilizers. Food can be produced through drought years. Water can improve the livelihood of farmers.
Answer: Increased runoff carries fertilizers.
Explanation:
Increased runoff carries fertilizers describes the negative impact of human water use. The fertilizers are used to improve the quality of the soil by increasing the concentration of the minerals essential for the growth of the plants. The use of water in excess will remove the fertilizers from the agricultural land and will take them to the nearby water body. Hence, causing water pollution.
Increased runoff carries fertilizers describes the negative impact of human water use.
The increased runoff of water due to human activities, such as agriculture and urbanization, can carry fertilizers and other pollutants into water bodies, leading to water pollution and ecosystem degradation. Fertilizers used in agriculture contain nutrients like nitrogen and phosphorus, which, when washed into rivers and lakes by runoff, can cause excessive algae and plant growth (eutrophication).
This disrupts the balance of aquatic ecosystems, depletes oxygen levels, and harms aquatic life, ultimately negatively impacting water quality and biodiversity. Managing runoff and implementing sustainable agricultural practices are essential to minimize the negative impacts of human water use on water bodies and the environment.
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Over time, carrots were selectively bred to get different varieties with desirable characteristics. Which variety developed from a desire to have a long and slender carrot?A.Nantes
B.Danvers
C.Imperator
D.Chantenay
Answer:
Over time, carrots were selectively bred to get different varieties with desirable characteristics. Which variety developed from a desire to have a long and slender carrot?
A. Nantes
B. Danvers
C. Imperator
D. Chantenay
Hope this helps :)
Have a great day !
5INGH
Explanation:
Answer:
c i beleive
Explanation:
Which describes the most direct function of the nostrils?
allows air to enter lungs
guides air to the larynx
permits food to reach the pharynx
permits air to enter the body
.....It was d...♀️
Answer: they allow air to enter lungs and also permits air into the body
Explanation:
the answer is permits air to enter the body