cell membrane
A selectively permeable membrane allows some molecules across but not others. The cell membrane controls what enters and exits the cell and thus protects the cell.
What process involves the change of an allele's frequency in a
population due to the fitness benefit it gives to the individuals
who have it?
Answer:
The correct answer is - natural selection.
Explanation:
The change of an allele's frequency or microevolution in a particular population due to its fitness benefit it provides to the individuals of the population can be caused by the natural selection process. Relative reproductive success is a measure of Fitness.
The change of an allele's frequency in deleterious traits mostly decreases in a population and this process is known as adaptive evolution. There is no or very small number of relative reproductive success present.
Answer:
Natural selection
Explanation:
PLZ HELPPPPPPPPPPPPPPPPPP
Answer:
the answer is the third one
answer and show work,
Answer:
D
Explanation:
A is not correct as the lighter mouse are more visible, and are more likely to die. They can't reach reproductive age if dead.
B is not correct because lighter mice cannot be successful in finding food if easy prey for predators.
C is not correct because the question shows the predator being the variable that changed the population of lighter mice, not food.
What is an air mass that forms over either the northern or southern
regions of the globe?
The San Andreas fault is an example of which kind of boundary? A. Transform B. divergent C. oceanic D. convergent
Answer:
C
Explanation:
It’s near the ocean
Skin cells form new cells to replace the damaged cells. What is the most important outcome of this process?
Mitosis is the process which is responsible for the replacement of old and damaged skin cells with new skin cells. This process is responsible for the formation of new cells which are similar to the parent cell.
What is Mitosis?Mitosis is the process of cell division wherein the chromosomal material of the cell replicate and get equally distributed into the two daughter cells. The chromosome number in each of the daughter cells produced is equal to that in the parent cell which is diploid (2n). Hence, mitosis is known as equational division.
The offspring or daughter cells produced through mitosis are similar to the parent cells and are called as clones. The mitotic division is divided into four main phases which include prophase, metaphase, anaphase, and telophase.
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I’ll mark brainiest if your right need ASAP
Answer:
D: Bb
Explanation:
Answer:
bb
Explanation:
Bro, I can't explain because anything I say says that it contains a link
actually I don't even look this up bc I already learned this so my bad
1 pts
Which of these materials is opaque?
Opaque, adj.: not transparent or translucent; impenetrable to light; not
allowing light to pass through.
air
aluminum
fog
water
because im too lazy to look them up what are the definitions of:
^Air mass
^Front
^Cold front
^Warm front
^Occluded front
^Stationary Front
^Low pressure system
^High pressure system
^Coriolis effect
(please put in the same format, ty :D)
Answer:
Explanation:
Air Mass: a body of air with horizontally uniform temperature, humidity, and pressure.
Front: the forward edge of an advancing mass of air.
Cold Front: the boundary of an advancing mass of cold air, in particular the trailing edge of the warm sector of a low-pressure system.
Warm Front: the boundary of an advancing mass of warm air, in particular the leading edge of the warm sector of a low-pressure system.
Occluded Front: a composite front produced by occlusion.
Stationary Front: a front between warm and cold air masses that is moving very slowly or not at all.
Low Pressure System: A low pressure system has lower pressure at its center than the areas around it. Winds blow towards the low pressure, and the air rises in the atmosphere where they meet.
High Pressure System: A high pressure system has higher pressure at its center than the areas around it. Winds blow away from high pressure.
Coriolis Effect: an effect whereby a mass moving in a rotating system experiences a force (the Coriolis force ) acting perpendicular to the direction of motion and to the axis of rotation. On the earth, the effect tends to deflect moving objects to the right in the northern hemisphere and to the left in the southern and is important in the formation of cyclonic weather systems.
What advantage does fruit provide for the seeds inside?
A)
The fruit protect the seed from water.
B)
The fruit provides the seeds the nutrition they need to grow.
The fruit makes the seeds less appealing to animals and prevents them
from being eaten.
D)
The fruit makes the seeds appealing to the animals who disperse the seeds
in their waste
Answer:
b
Explanation:
The karyotype below depicts a mutation on chromosome #23. What type of mutation is this?
a
deletion
b
nondisjunction
c
down syndrome
d
translocation
Answer:
option B is correct.
non disjunction
Explanation:
there are three chromosomes in 23rd pair. it is a type of mutation called non disjunction.
Answer:
The correct answer is non disjunction
Explanation:
Non-disjunction refers to the chromosomes failing to separate correctly, resulting in gametes with one extra, or one missing, chromosome.
Hope this helped
why milk eventually goes sour.
Answer:
Explanation:
It is the lactic acid which makes milk taste sour. Pasteurising milk kills off harmful bacteria and greatly reduces the number of lactobacillus ensuring that milk will last up to three weeks in a fridge. Lactobacillus is a very useful bacterium as the acidic conditions it creates makes a milk protein called casein turn to curd.
Answer:
due to lactic acid makes milk taste sour
We do not usually experience sensations directly.
True or false
Answer:
true
Explanation:
Where do animals get the matter they need to form new tissue?
Which conclusion do the graphs support?
The question on the left show
Answer:
where is the picture of the graphs
Explanation:
what is the probability that a mother with type O blood and a father with type AB blood will have a child with type B blood
Answer:
So, without being given any more information (like that another child is already A, B, or O) then there are 16 possible combinations that can be had, but only one of them is type O, so there’s a 6.25% chance the child could be O.
:
For example, a friend of yours goes to the gym and takes a 30-minute, cardio interval training class. While switching between doing high-intensity push-ups, jumping jacks, and weight training, she notices that there is a burning sensation in her muscles. The burning is due to the buildup oflactate in the muscle tissue, a result of her muscles supplying ATPanaerobically . What is true about this pathway for forming ATP
Answer:
No oxygen is required.
Explanation:
This pathway for forming ATP needs no oxygen and the ATP that is produced are in very low concentration. The low amount of ATP production occurs when the cell goes for anaerobic respiration in which the cell produces less ATP. This type of ATP production occurs only when the body requires ATP quickly so that's why the body uses this type of respiration during exercise and running activities etc.
3)
When did atoms begin to form in the universe?
Answer:
As the universe continued to expand and cool, things began to happen more slowly. It took 380,000 years for electrons to be trapped in orbits around nuclei, forming the first atoms.
Explanation:
Define the mineral property of cleavage.
-the shape of a mineral
-a rocks resistance to being smashed
-the way a mineral naturally breaks when smashed
-the way a mineral reflects light
Answer:
gshwuwhwb2jnene
Explanation:
bahahahahha
Answer:
if im correct then t
he cleavage is a property of minerals that deals with the exterior, which includes the smoothness and flat surface.
While the crystal habit is all about the interior arrangement of the particles that make up the mineral. The crystal habit is an interior property, where there is a specified angle and arrangement of particles of a mineral
Explanation:
What is the source of energy behind the carbon cycle?
4
O decomposition
sun
O combustion
O consumers
Answer:
B. Sun.
Explanation:
The carbon cycle can be defined as the cycle in which carbon atoms travel from the atmosphere to earth and back to the atmosphere. As carbon is the source through which all life on earth exists.
The source of the carbon cycle is solar energy. During the process of photosynthesis, it is the sun that plays an integral role in taking carbon dioxide from plants.
Therefore, option B is the correct answer.
In meiosis, the paired
and duplicated
chromosomes are
called tetrads. Tetrads
have how many
chromatids?
A. Four
B. Three
C. Two
A farmer notices that her crops are being destroyed by wind. They are starting to lean to one side, and the soil is blowing across the field. Which soil conservation method would make the most sense for her to try?
Terraces
Windbreaks
Contour plowing
Conservation tillage
Answer:
Answer is Windbreaks
Explanation:
Windbreaks is the soil conservation method would make the most sense for her to try. So, the correct option is B.
What is Soil conservation method?Soil conservation is defined as the "combination" of practices used to protect soil from erosion, treating soil as a living ecosystem, and recognizing that all organisms that feed on soil Make your home, play an important role in making a fertile healthy.
These methods involved in preventing soil erosion, denudation, erosion and pollution which include many methods mainly involved in agricultural techniques due to the close relationship of plants with the soil. Windbreaks is the type of soil conservation method.
Therefore, the correct option is B.
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advantages and dis advantages of asexual reproduction in plants
Explanation:
Advantages Of the asexual reproduction
The organism that reproduces asexually has the ability to take many different extensive forms that allow asexual reproduction to succeed in various environments?
The asexual reproduction is only performed in the organisms that often stay in one place, It does not need mobility, So, most plants have a great ability to create their offspring as this process doesn’t need to move to another place.
Asexual reproduction has a rapid increase of offspring which is very helpful in producing lots of offspring, It lets the plants make lots of offspring effectively which will help them in increasing their genes.
Disadvantages Of Asexual Reproduction
Most organisms that only perform the asexual reproduction process have less chance to adapt to the changes of the environment as they need stable environments.
Only one parent plant is required for the asexual reproduction, the new plants are identical to the parent so that good features will always be passed on, the chromosomes and genes of the parent will be copied, So, there will be genetic defects or the mutation in the offspring with no exception.
The asexual reproduction does not have the genetic diversity, there is less variation produced with the offspring, and the organism becomes less adapted to certain environmental changes, the entire communities will not be adapted to the harsh environment.
The asexual reproduction usually leads to struggle for the existence as well as the overcrowding, and the main distinction of asexual reproduction from the sexual reproduction is that there is no need for two parents as well as special cells to reproduce.
A group of students were debating whether unicellular bacterial cells that reproduce using the process of binary fission are actually performing mitosis and meiosis. Select the student with the best argument.
Poppy: A bacterial cell is going to undergo mitosis so that it can create offspring with double the number of chromosomes. The offspring with the double amount of chromosomes will then divide with mitosis creating four daughter cells with triple the amount of chromosomes.
Zabriya: The process of binary fission and meiosis are basically the same process with the same end result, a daughter cell with half the number of chromosomes. Unicellular organisms are not going to undergo mitosis because mitosis doubles the number of chromosomes.
Gauge: The process of binary fission is similar to mitosis because the results are identical cells, but binary fission always results in new identical organisms with the same chromosomes as the parent.Meiosis is not performed because the offspring would have half the number of chromosomes.
Dacy: A bacterial cell is going to do both mitosis and meiosis. The bacterial cell will divide using the process of mitosis and then it will divide again using meiosis creating four daughter cells with the same number of chromosomes as the parent bacterial cell.
Answer:
poppy is the best of the debating
The cell cycle is disrupted when there is an abnormal increase in the rate of mitosis. An
abnormal and uncontrolled increase in the rate of mitosis is frequently associated with an
individual developing
A. O a type of cancer.
B.
into two or more organisms.
C.
only one sex cell.
D.
a single set of chromosomes.
Answer:
A
Explanation:
Cancer is the uncontrolled increase of cells, so when the rate of mitosis increases, so does the number of cells. This means A is the answer.
Uncontrolled cell growth is cancer. Gene mutations can increase the pace of cell division or suppress natural mechanisms that keep the body in check, like cell cycle arrest or programmed cell death. Thus, option A is correct.
What results, uncontrolled increase in the rate of mitosis?The cell's size, the presence of neighboring cells, and other chemical stimulators are three of the key elements in mitotic regulation.
Numerous mitogens are involved in regulating mitosis. Therefore, cell size, cell existence, and chemical stimulators are the proper answers.
When cancer cells develop in body tissues, they undergo aberrant cell growth patterns known as hyperplasia and dysplasia.
An increase in the quantity of cells in an organ or tissue that look normal under a microscope is known as hyperplasia.
Therefore, An abnormal and uncontrolled increase in the rate of mitosis is frequently associated with an individual developing cancers.
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The health, management and conservation of biodiversity, is a challenge facing ecosystems worldwide. The major factors that
affect the health and function of the Great Barrier Reef are climate change and pollution. Which question investigates the effects
of a biotic factor on the reef ecosystem?
A)
How do calcium levels affect the habitat of stony corals?
B)
How do nitrogen levels affect the amount of algae in the reef?
How does the number of predators affect the lion fish population?
D
How does water temperature affect the reproduction rate of coral?
Answer:
CExplanation: Yes
what are the method of beekeeping
Answer:
The ultimate aim of bee keeping is to get more and more honey in pure form. The old method commonly used by old apiculture is very crude, cruel and of unplanned type. This old method is called as Indigenous method.
the following phase of meiosis then put them in the correct order
Anaphase I , Metaphase II , Telophase l , Prophase l , Telophase ll / Cytokinesis ll
Telophase ll , Prophase ll , Metaphase l
Answer:
The correct order is
Prophase l , Metaphase l, Anaphase I, Telophase l, Prophase ll, Metaphase II, Telophase ll / Cytokinesis ll
Explanation:
In Meiosis there are total two phases - Meiosis I and Meiosis II and each phase consists of total six sub phases which are as follows -
Meiosis I
1. Prophase I
2. Prometaphase I
3. Metaphase I
4. Anaphase I
5. Telophase I
6. Cytokinesis I
Meiosis II
1. Prophase II
2. Prometaphase II
3. Metaphase II
4. Anaphase II
5. Telophase II
6. Cytokinesis II
Hence the correct order is
Prophase l , Metaphase l, Anaphase I, Telophase l, Prophase ll, Metaphase II, Telophase ll / Cytokinesis ll
What is the correct order of units in a living organism, from smallest to
largest?
A. Tissue, organ, cell, organ system
B. Cell, tissue, organ, organ system
C. Cell, organ, tissue, organ system
D. Tissue, cell, organ, organ system
Answer:
b
Explanation:
because I know.......
Answer:
The levels, from smallest to largest, are: molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere.
Explanation:
A geneticist is trying to recreate a strand of DNA from a crime scene investigation. The strand of DNA recovered from the scene was 1800 bases long. The geneticist has determined that the strand contained 425 thymine
nucleotides. Based on this information, identify the number of cytosine nucleotides
Answer:
475
Explanation:
The strand is only made up of Adenine, Thymine, Cytosine and Guanine. There will be the same number of Adenine as there are Thymine and the same number of Cytosine as there are Guanine.
We know there are 425 Thymine. This means there are also 425 Adenine. Therefore, you would subtract 850 (425x2) from 1800 to find the amount of Cytosine and Guanine left, which is 950.
Out of the 950, half will be Cytosine and half Guanine. 950/2 is 475.