During meiosis, homologous chromosomes exchange genetic material. This exchange of genetic material —
a increases the genetic variation
b reduces the diploid number to the haploid number
c increases the haploid number to the diploid number
d reduces the probability of mutations
Answer:
A
Explanation:
help please!!! don’t mind the answer that’s filled in already i don’t know the answer
Answer:oop
Explanation:thats hard
The graph shows the rate of the reaction of an enzyme-catalyzed
reaction at different temperatures. Which statement is best supported
by the data?
as the temperature increases the enzymes gradually increase their performance until it reaches the optimum temperature which is the peak after that it denatures because teh temperature is too high and hence the activity drops quickly.
As the temperature increases the enzymes gradually increase their performance until it reaches the optimum temperature which is the peak after that it denatures because teh temperature is too high and hence the activity drops quickly.
What are enzymes?Enzymes may be defined as the bio catalyst that can increase the speed of a bio chemical reaction of the body. Enzymes decreases the activation energy of the reaction and maintains the reaction equilibrium.
Wendy has investigated the rate of the catalysis of reaction at different temperatures. Enzymes are very specific in nature and works at optimum temperature conditions only. The enzyme catalyze the reaction at highest speed if the temperature is optimum for the enzymes.
Enzymes are the biocatalyst that increases the rate of a reaction without getting consumed in a reaction. They participate in the reaction and increase the rate of the reaction by decreasing the activation energy of the reaction.
The relation between the reaction rate and enzyme is shown in the following graphs. The rate of reaction is on the x-axis and the enzyme-catalyzed reaction is on the y-axis.
Therefore, As the temperature increases the enzymes gradually increase their performance until it reaches the optimum temperature.
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draw neat and labelled diagram of smooth muscle?
Muscular system is an organ system, Body performs all the kind of movements with the help of muscular system. Almost all the animals have muscles. The muscular system is composed of specialized cells called muscle fibers. Their predominant function is contractibility. Muscles are attached to bones or internal organs and blood vessels. There are more than 600 muscles present in a human body.
[tex]\Large\textbf{Types of Muscles:}[/tex]
There are three types of muscles in a vertebrate body. They are
skeletal musclescardiac musclessmooth muscles[tex]\Huge\text{Smooth Muscles}[/tex]
Smooth muscles are structurally the simplest of all muscles types. They are non-striated, and consist of long spindle shaped uni-nucleated muscle cells that are usually arranged in sheets that surround the body's hollow organs. Smooth muscles are also involuntary in action. Smooth muscles push the food through the digestive tract, they empty your urinary bladder, they control the diameter of the blood vessels, the diameter of your eye, the state of erection of hair of the skin, and the smooth muscles form the layer of sheet around all the visceral organs.
Non-striated muscles, this means that muscles do not have transverse light and dark bands. The striations are caused by the regular arrangement of contractile proteins (actin and myosin). Actin is a globular contractile protein that interacts with myosin for muscle contraction. This means that non-striated muscles can not contract, thus they can not move.
Uni-nucleated Muscles, Smooth muscles are the only muscles which have cells with only one nuclei.
Involuntary in action, This means that their contraction is not under the control of somatic nervous system. The involuntary muscles are automatically controlled by the autonomic nervous system controls the activities of the inner visceral organs (heart, glands, smooth muscles), while the somatic nervous system controls all the voluntary actions.
Visceral Organs, word Visceral arises from latin word Viscera which means "the organ of the body", So Visceral organs are all the internal organs of the body, specifically those within the chest and abdomen. They are covered with visceral membrane made of smooth muscles.
I have attached two pictures of the smooth muscles, one is colored and the other one is colored and the other one is diagrammatic.
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The recent development of hybrid and electric vehicles has what effect on
the environment?
Please help for my homework
Answer:
They help reduce greenhouse gas emissions, but the downside is hybrid cars require more energy to produce than normal cars
Explanation:
Ok I'll see what I can do. I'll try my best to provide you the correct answer.
What causes the "plastic" nature of
the asthenosphere?
A. it is mostly water
B. it only found under the ocean
C. constant earthquake activity
D. heat from below
The heat from below causes the "plastic" nature of the asthenosphere. The correct option is D.
What is asthenosphere?The asthenosphere is the upper mantle's mechanically sluggish and ductile region.
It is located beneath the lithosphere, somewhere around 80 and 200 kilometers underneath the surface, and can extend up to 700 kilometers. However, the asthenosphere's lower boundary is not well defined.
Semi-plastic rock makes up the Asthenosphere. Because of Lithosphere has a lower density, it resides on top of the Asthenosphere, much like an iceberg or a block of wood does on water.
The lower mantle beneath the Asthenosphere is stiffer and less plastic. The outer core is located beneath the Mantle.
The "plastic" essence of the asthenosphere is caused by heat from below.
Thus, the correct option is D.
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Which process occurs in sexual reproduction?
(1) fission
(2) budding
(3) vegetative propagation
(4) fusion of gametes
In terms of a molecule, is DNA large or small?
Answer:
In all three cases, the large structure—a train, a sentence, a DNA molecule—is composed of smaller structures that are linked together in non-random sequences— boxcars, letters, and, in the biological case, DNA monomers.
1. The moon and Mars have a similar composition. Why is the gravity on the surface of Mars greater than the gravity on the moon's surface?
A. Mars is a solid and the moon is not.
B. Mars has a greater mass than the moon.
C. Mars is farther away from the Earth than the moon.
D. Mars is farther away from the Sun than the moon.
Answer:
The weaker gravity on the moon is due to its' smaller mass.
These cliffs found off the coast of Ireland were formed from limestone deposits, as the Earth's sea level rose and dropped over millions of years. The limestone layers became cliffs when they were pushed up by
A) faulting
B) earthquakes
C) landslides
D) volcanoes
Answer:
Answer down below!
Explanation:
A. Faulting
Faulting is a process where the Earth's tectonic plates shift up and down, thus, the mountains were formed by faulting!
Answer: The answer is faulting.
Explanation:
hope this helps you.
Spontaneous generation is the idea that new living organisms can form from nonliving matter. Cell theory, however, states that cells
can only grow from other cells.
Which of the following experimental results supports the idea that new cells can only form from other cells?
A. A plant cell had its cell wall broken, and the cell was found to no longer be able to function.
OB. A piece of uncovered meat that was left outside contained maggots by the end of one day.
OC. A container of soup that was heated and sealed did not grow mold even after several months.
OD. A mold sample examined under a microscope showed a regular structure made of many individual cells.
Answer: C. A container of soup that was heated and sealed did not grow mold even after several months.
Explanation:
HELP PLEASE ITS DOMINANT AND RECESSIVE TRAITS
Answer:
It will be full black bc the full color has dominat agents all the other rabbits
Explanation:
Answer:
[tex]Himalayan[/tex]
Can someone give your perspective on the negative impact of human activity on the environment. include pollution of marine and wetlands.....PLEASE I NEED THIS ONE!
thanks:)
If you need to drive from Dallas, Texas, to Salt Lake City, Utah, (about 1500 miles), and the speed limit is 60 mph most of the way, what is the least amount of time you will need?
Answer:
25 hours
Explanation:
Speed is a measure of the distance traveled by a body relative to the time taken to complete a trip or a journey. Mathematically, speed can be expressed as;
speed = distance/time
Hence, time = distance/speed
The distance covering Dallas, Texas, to Salt Lake City, Utah is about 1500 miles and the speed limit is 60 mph, hence;
time = 1500/60
= 25 hours
Therefore, the least amount of time that would be needed to cover the journey is 25 hours.
Answer:
25 hours is your answer
Explanation:
Herbivores get energy by eating plants. Plants get energy from sunlight. Why does most of the energy captured by plants never become available to herbivores?
Answer:
Because they lose most of the energy as heat when they perform metabolic activities
Explanation:
Cells of all living organisms require energy in form of ATP to perform their cellular functions. In an ecosystem, organisms obtain this energy by feeding on one another. However, these energy transfer starts from organisms capable of using sunlight called PRODUCERS e.g plants.
Herbivores, which are PRIMARY CONSUMERS get their energy by feeding on these plants. However, according to the PYRAMID OF ENERGY, which represents the flow of energy in an ecosystem, only a few portion of the energy (about 10%) derived by plants from the sun gets transferred to herbivores. This is because most of the energy (about 90%) is lost as heat when the plants undergo metabolic activities.
The majority of the energy captivated by the plants never become accessible to herbivores because of the 10 percent rule, that is, for each trophic level, only approximately 10% of the energy moves from one level to the next level.
• An animal, which primarily consume plants and its products is termed herbivore.
• The herbivores occupy the second level and consume producers, that is, the plants, thus, they are termed as the primary consumers.
• Approximately, 10% of the energy is passed from one level to the next, for each trophic level. This is known as the 10% rule.
• Due to this rule, the herbivores only get about 10% of the energy stored by the plants they consume.
Thus, due to 10% energy rule, the majority of the energy captured by the plants never become available to herbivores.
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Whats sounds can dogs hear that we cant ?
Answer/Explanation:
Dogs have outstanding senses. not only do they have good smelling sense but they also have a good sense of hearing. Humans can't hear hear above 20,000 HZ. However, dogs can hear much higher pitches than we can. Dogs can hear up to 65,000 HZ. This is why we are unable to hear a dogs whistle, but the dogs can.
What is it called when an aquifer gets refilled/replenished? if you answer correctly i’ll make you brainliest:)
Answer:
A recharge zone usually occurs at a high elevation where rain, snowmelt, lake or river water seeps into the ground to replenish the aquifer. A discharge zone can happen anywhere. ... Many people with wells are accessing an unconfined aquifer layer for drinking water. This can be an issue when there is a drought.
Explanation:
aquifer?
If Im wrong please correct me(･д･｀o)
A man catches a disease. The man has not been immunised against this disease. A doctor gives the man a course of antibiotics. Figure 2 shows how the live number of live disease in the body changes when the man is taking the antibiotics. Four days after starting the course of antibiotics the man feels well again. It is important that the man does not stop taking the antibiotics .Explain why
Answer: To kill the bacteria causing the illness
Explanation:
When a person takes antibiotics, the bacteria causing diseases will be severely hampered in its operations which will lead to the symptoms of the disease reducing. The bacteria will not die until the drug is taken as prescribed which is why the full dosage must be taken.
If it is not, the bacteria can regain strength and start causing sickness again except this time, it may grow an immunity to the antibiotics which means that an even stronger dosage of antibiotics will be needed.
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Ignore the draw arrow thing :)
Which of the following characteristics of a population will make it better able to adapt to environmental changes?
A.Rapid production of many offspring.
B.Specialization in one type of food source.
C.Large amount of inherited genetic variation.
D.Isolation to a limited geographic range.
Answer:
C
Explanation:
Answer: C. Large amount of inherited genetic variation.
If you had a population where the genetic variation wasn't as high or practically non-existent, then that population is likely suited to that very narrow specific environment. If the environment doesn't change, then the population wouldn't have a problem. However, the environment isn't likely to stay static. Things change all the time and this change will bring challenges to the population that was suited for the old environmental conditions.
Populations with high genetic variability will have some individuals thrive while some unfortunate members will perish. The members that die off are likely the ones who cannot adapt to the changes. As the environment changes, the individuals who survive will pass on their DNA to their offspring, allowing for natural selection to reinforce those favorable traits. Since the environment is constantly changing, whether that change is slow or fast, this means the process is continued indefinitely. So that's why high genetic variability is favored.
what is a function of a protein marcomolecule?
Answer:
Proteins are a class of macromolecules.
Explanation:
Proteins are a class of macromolecules, that can perform a diverse range of functions for the cell. They help in metabolism by providing structural support and by acting as enzymes, carriers or as hormones. The building blocks of proteins are amino acids.
During the late Precambrian era, enough
a
escaped from volcanoes to begin
period of
global warming.
Answer:
Eventually, enough CO2 escaped from volcanoes to begin a period of global warming; melting opened a great variety of new niches. When CO2 levels were high, they created a greenhouse effect. More heat was trapped on Earth's surface, and the climate became warmer.
Explanation:
Which would be an autotroph in a grassland ecosystem
Answer:
prairie cordgrass
Explanation:
Spartina pectinata is a species of cordgrass known as prairie cordgrass, freshwater cordgrass, tall marshgrass, and sloughgrass. It is native to much of North America, including central and eastern Canada and most of the contiguous United States except for the southwestern and southeastern regions.
Autotrophic organisms may synthesize organic chemicals from inorganic substances like light prairie cordgrass is an autotroph in a grassland ecosystem, hence option B is correct.
What are autotrophs?Autotrophs are another name for producers. Through a process known as photosynthesis, they produce all of their own food.
Autotrophic organisms are producers because they have the ability to transform inorganic elements like light into the nourishment that best suits their requirements. The majority of these species are plants that photosynthesize.
1% of the energy that reaches the earth's surface is absorbed by autotrophs. From autotrophs to heterotrophs, this little fraction of energy passes through the entire ecosystem before dissipating in the environment.
Therefore, organisms may synthesize organic chemicals from inorganic substances like light prairie cordgrass is an autotroph in a grassland ecosystem, hence option B is correct.
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The given question is incomplete so the most probable complete question is,
Which would be an autotroph in a grassland ecosystem?
A. monarch butterfly
B. prairie cordgrass
C. mallard duck
D. muskrat
Which of the following is not true of chromosomes?
They are condensed form of chromatin for cell division
They are found in the nucleus of cells
They are found on genes
They are made up of DNA and histones
Answer:
I believe its B, I could be wrong
Identify part A, B and C. What is the function of part B?
⚠️⚠️⚠️PLEASE HELP QUICK!⚠️⚠️⚠️Complete the following Punnett square,show the genotypes produced by the previous question. Assume the agouti rabbit is female. Place your answers in their correct spots on the grid. The grid is below. Please help me.
Answer:
Now there we go! That's the complete question. But anyway, here's your answer:
C C
A AC AC
A AC AC
Basically, what this Punnett Square means is that all of the offsprings will be Agouti, due to Agouti being the dominant trait. However, the genotype of the offsprings will be heterozygous since all offsprings also carry the allele C as well.
Explanation:
Hope this helped!
Explanation:
What is the role of microfilaments in cell division?
Answer:
to help divide the cell during mitosis/ aid the process of cytokinesis
Explanation:
Answer:
microfilaments are made up of proteins including actin and myosin
these proteins help "pinch off" the two daughter cells during cell division during the final stages, a microfilament ring forms and contracts to separate the new cells during cytokinesis.
hope this helped :D
How are water scarcity and water pollution related?
Water pollution is a solution to water scarcity.
Water scarcity contributes to water pollution.
Water pollution contributes to water scarcity.
Water scarcity is a solution to water pollution.
In the mainlands of Southeast Asia
what crop does the climate help to
foster?
A. cantaloupe
B. wheat
C. rice
Answer:
the answer is A. cantaloupe
Explanation:
Which of the following are examples of geological processes that occur slowly
Answer:
Explanation:
Earth changes in its own natural ways. Some changes are due to slow processes, such as erosion and weathering, and some changes are due to rapid processes, such as landslides, volcanic eruptions, Tsunamis and earthquakes.
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The examples of geological processes that occur slowly is soil erosion and weathering.
What do you mean by soil erosion?Soil erosion is the denudation or wearing away of the upper layer of soil. It is a form of soil degradation. This natural process is caused by the dynamic activity of erosive agents, that is, water, ice, snow, air, plants, and animals.
Soil erosion occurs primarily when dirt is left exposed to strong winds, hard rains, and flowing water. In some cases, human activities, especially farming and land clearing, leave soil vulnerable to erosion.
Removing trees and plants, plowing fields, and overgrazing by livestock disrupts roots that stabilize sediment and soil. These human activities can increase erosion rates 10 to 100 times that of non-human geologic processes.
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