What are the causes of variations ? please explain thi also
Answer:
variation can be caused by mutation and other things
Explanation:
A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light or cigerette smoke
➜ Following are the causes of variations:
Dual percentage: Offsprings inherit some features from mother and some from father. Hence no offspring will exactly resemble to either of the parent or each other.Mutation in gene or chromosomal pattern also causes variations.A group of mice becomes separated by the formation of a river. Over time, the northern mice became smaller and whiter, while the southern mice became larger and browner. This is an example of:
Answer Choices:
-divergence
-homology
-gigantification
-industrial melanism
This is an example of gigantification.
What is meant by evolution?
Evolution is the change in the features of a species over several generations and depends on the procedure of natural selection. The theory of evolution is based on the idea that all species are related and gradually change over time.
Thus, this is an example of gigantification.
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A climber falls down on a rope causing his body to lift up words and rise up along the rope is that newtons first law second law or third law
Complete the chart. Thymine _____, Guanine ____.
Answer: 27, 23
Explanation: Thymine goes with Adenine and together they equal 50 so Thymine would be 27 because Adenine is 23. Same with Cytosine and Guanine. They go together and equal 50 so Guanine would be 23 because Cytosine is 27. Hope this helps!
Can someone give me the answer for both questions please:)
Answer:
The answers are:
C danimeletion
B dna - rna - amino acid - protein - genetic expression
In plants and animals, sexual reproduction causes variation
within a species. This variation is vital to their survival. How does
genetic variation affect a species' survival?
A. A species with variation is more easily found by predators.
B. A species that shows more variation will have a longer life cycle.
C. A species that has no variation might eventually become extinct.
D. A species without variation will overpopulate and produce new
species.
A break in the earths crust where slabs of crust slip past each other is called
A. Plate tectonic
B. lithosphere
C. Continental drift
D. Volcano
Answer:
They should have fault for an answer choice because that the correct anwser
but the close thing to is a plate tectonic you should ask your teacher about this question
Explanation:
How do the characteristics of an organism contribute to their survival?
HELP I WILL GIVE BRAINLIEST
The main point of this page is..???
Answer:
The Main point of the page is to explain Celestial Objects to audiences who didn't know before.
Explanation:
It's a page to deeper to understanding of Celestial Objects or floating rocks :)
Which of the following is not an example of a unique adaptation that suits an organism to a particular environment?
Answer:
Could you possibly provide the list in which I can choose from to state the answer?
Plants growing high up on mountains tend to be much smaller than those growing at sea level. This is because the rate of photosynthesis for plants on the mountain is slower. Which factor is at a lower level in the mountain environment, causing a limit to the rate of photosynthesis?
Answer:
CO2
Explanation:
Viruses are able to infect cells because they share a common genetic code and are able to use host cell enzymes to carry out protein synthesis. There are some structures which are
unique to viruses and not found in cells. These include which of the following:
l. Protein capsid
II. Nucleic acids
III. Cell wall
Answer:
Protein capsid are unique to viruses.
Explanation:
Answer:
1 only
Explanation:
what controls the passage of materials into and out of a cell
Answer:
The cell membrane.
Explanation:
3. Si sales de tu casa y recorres 5 metros de distancia. ¿A qué distancia te
desplazaste?
Answer:
5 metros.
Explicación:
Si sale de su casa y camina 5 metros, significa que está a 5 metros de su casa porque cubre 5 metros de distancia. La distancia es la longitud que recorre un cuerpo entre dos puntos. Aquí un punto es la casa y el otro punto es la persona, por lo que si calculamos la longitud, encontramos que el individuo cubre 5 metros por lo que podemos concluir que el individuo está a 5 metros de su casa si camina 5 metros de su casa. casa al exterior.
Write a paragraph (at least 5 complete sentences) about the positive experiences during your Spring Break 2021.
Can you relate any of your time well spent to science?
Try to use two of these words in your paragraph:
Allele
Antibody
Artery
Bacteria
Bronchus
Cell Cycle
Cell Membrane
Chromosomes
Cytoplasm
DNA
Enzyme
Esophagus
Evolution
Fossil
Genotype
Homeostasis
Independent Variable
Kidney
Larynx
Mitosis
Nucleus
Answer:
your gonna have to use your own resources (memory etc.) to tell about your spring break... think about anything you saw or did or whatever including these terms:)
Starting on bare rock what is the usual ecological succession of organisms
Complete question:
Starting on bare rock, what is the usual ecological succession of organisms?
a)shrubs--grasses--lichens--trees
b)lichens--shrubs--grasses--trees
c)grasses--shrubs--lichens--trees
d)liches--grasses--shrubs--trees
Answer:
d)liches--grasses--shrubs--trees
Explanation:
The succession is the colonization of an open area and includes all the changes the area suffers since then. It is a sequence of events that involves the establishment of different species through time.
There are two types of succession, primary and secondary, depending on the magnitude of the alteration.
Primary succession refers to an open space with no living organisms, such as a bare rock exposed due to a retreating glacier, a volcanic activity, or an intense fire. If previous species were inhabiting this area, after the event, nothing is left.
In those cases where there is an alteration or disturbance at a site that opens the area, it allows new species to grow. With time, new species arrive and manage to establish again. The order of the establishment depends on the strategies of each of the species to survive.
First, pioneer species arrive. These are the first inhabitants, mostly lichens or moses with the capability of surviving in such an environment. Only a few pioneers can establish in the open space. Pioneers modify the habitat. They make it more suitable for the establishment of later species, converting rock into fertile soil. As conditions get better, new species arrive like grasses. Grasses and pioneers keep modifying the soil, making it better with time. New species arrive, like small species, bushes and shrubs. Habitat modification keeps on going while new species establish (trees, pines, among other big species). They produce shadows, alter the temperature, and humidity, fertilizing the soil, competing for resources. Competition becomes more frequent between species. The first species are eventually eliminated by competition, but new species keep appearing and competing for resources. This sequence continues until the commuting reaches a climax, becoming stable and lasting for hundreds of years until another disturbance occurs.
Answer:
D. liches--grasses--shrubs--trees
Explanation:
primary ecological succession will be as: lichens inhabit bare rocks and breakdown the minerals rich material in the rock and die to produce organic material so that new species could be formed as grasses will grow which will become shrub and eventually the tree. Animals eat those grass, shrub or tree products.
How can having 100 trillion microorganisms on and in the human
body be healthy?
Answer:
Explanation:
Immune response Evidence points to the fact that this early microbial colonization helps our body to defend itself against disease.
How many PAIRS of chromosomes are in a human egg cell?
Answer:
23 pairs, 46 chromosomes in total.
Explanation:
Describe how ballet dancers endure the pain of the equivalent of three elephants standing on their toes.
Answer:
They trudge through it.
Explanation:
They also have special shoes to make it more comfortable.
Answer:
Hope this helps
Explanation:
The shoes are also equipped with a reinforced insole, called the shank. Along with the box, the shank provides support for the dancers body weight as it supports the arch of dancers foot, allowing them to stand upright on their toes.
Help... I have number one done I just need to awnseres to 2 and 3
It is not the strongest of species that survive nor the most intelligent but the one most responsive to __________________
Answer:
change
Explanation:
This is a quote from Charles Darwin (a.k.a the father of evolution)
So, your full quote would be "It is not the strongest of species that survive nor the most intelligent but the one most responsive to change"
Which cell replicates via meiosis?(1 point)
sperm cell
heart cell
skin cell
red blood cell
thanks!!
Answer:
Sperm cell
Explanation:
Because it is a reproductive cell and in one of the stages of foetus growth is meiosis so this cell undergoes meiosis to pass that stage
Meiosis is the process by which cells divide into four haploid daughter cells.Sperms are the cells that replicates via meiosis. Option A is correct.
Meiosis:
It is the process by which cells divide into four haploid daughter cells.
The daughter cells contains half of its parents chromosomes.The daughter cells are genetically different from the parent cells.It is occur in the germ cells of the organisms to produce gametes like sperm and ovum.Therefore, sperms are the cells that replicates via meiosis.
To know more about Meiosis,
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Human Immunodeficiency Virus (HIV) is a virus that infects (and destroys) Helper T Cells. As a result, people who are HIV+ generally have a low number of these T Cells. How would the dramatic decrease in Helper T Cells caused by HIV affect a person’s immune response? Be specific using details from what you learned about the immune response.
Answer:
HIV invades various immune cells (e.g., CD4+ T cells and monocytes) resulting in a decline in CD4+ T cell numbers below the critical level, and loss of cell-mediated immunity − therefore, the body becomes progressively more susceptible to opportunistic infections and cancer.
HIV infects and deletes CD4+ T cells that normally coordinate the adaptive T- and B-cell response to defend against intracellular pathogens. The immune defect is immediate and profound: At the time of acute infection with an AIDS virus, typically more than half of the gut-associated CD4+ T cells are depleted, leaving a damaged immune system to contend with a life-long infection.
What is the lowest level of organization of the biosphere, or the one that
has the fewest members?
Answer:
Organism
Explanation:
the answer is Organisms
The immune response consists of different components playing their role for a common goal: to rid the body of a pathogen. Create an analogy that helps explain the roles of the responses of the immune system and describe the relationship between the responses.
Answer:
In a primary immune response, naive B cells are stimulated by antigen, become activated, and differentiate into antibody-secreting cells that produce antibodies specific for the eliciting antigen.
A secondary immune response is elicited when the same antigen stimulates memory B cells, leading to the production of greater quantities of specific antibodies that are produced in the primary response
Answer:
In a primary immune response, naïve B cells are stimulated by antigen, become activated, and differentiate into antibody-secreting cells that produce antibodies specific for the eliciting antigen.
A secondary immune response is elicited when the same antigen stimulates memory B cells, leading to the production of greater quantities of specific antibodies that are produced in the primary response.
What determines the potential energy of particles in matter?
if you answer correctly i will award brainliest
What is the result of normal chromosome replication?
O a
b
Lost or worn out chromosomes are replaced.
Each daughter cell is provided with twice as many
chromosomes as the parent cell.
The exact number of centrioles is provided for
spindle fiber attachment.
Two identical sets of chromosomes are produced.
Answer:
Two identical sets of chromosomes are produced.
Explanation:
hope this helps!
HELP ME
I NEED THIS FOR NOW
I WILL GIVE YOU BRAINLIEST
Answer:
1) As soon as the paper cuts into the cells of your skin, your body springs into action. First, blood cells called platelets join together at the paper cut and form a clot to stop the bleeding.
The process is called Blood clotting.
2) The cell that are made will have the same same amount of DNA/chromosomes.
3) Chromosomes come in pairs. Normally, each cell in the human body has 23 pairs of chromosomes (46 total chromosomes). Half come from the mother; the other half come from the father. Two of the chromosomes (the X and the Y chromosome) determine your sex as male or female when you are born.
When the humidity (amount of water vapor) increases, the air pressure decreases or increases
Answer:
decreases :)
Explanation: