What expression represents chromosome numbers during fertilization?

Answers

Answer 1

Answer:

n + n = 2n I think.


Related Questions

A(n)\ is an area of the planet that shaves similar conditions of climate, fauna (animal life), flora (plant life) and geography .
1.biome
2.environment
3.habitat
4.ecosystem

Answers

A BIOME, also called a bioclimatic landscape or biotic area, is a certain part of the planet that shares the climate, flora and fauna. A biome is the set of characteristic ecosystems of a biogeographic area that is defined from its vegetation and the predominant animal species

[tex] \bold{biome }[/tex]

⭐----------------------------------------------------------------------------------------------✄ ----------------------------------------------------------------------------------⭐

BRAINLYMENTALMENTE

Which combination correctly pairs a product from a reaction in the nitrogen cycle with a molecule synthesized by plants using that product

Answers

Answer:

(A) nitrates—proteins

Note: The question is not complete. The complete question is given below:

Which combination correctly pairs a product from a reaction in the nitrogen cycle with a molecule

synthesized by plants using that product?

(A) nitrates—proteins

(B) ammonia—carbohydrates

(C) nitrogenous wastes—nitrites

(D) atmospheric nitrogen—nitrates

(E) atmospheric nitrogen—ammonia

Explanation:

The nitrogen cycle refers to the cycle through which nitrogen is transferred for use through both living and non-living things, involving the atmosphere, soil, water, plants, animals and bacteria.

The nitrogen cycle is especially important for living things because nitrogen is essential for the formation of amino acids which form proteins.

The nitrogen cycle occurs in five stages:

1. Nitrogen fixation - Nitrogen gas from the air is converted to nitrate compounds by nitrogen-fixing bacteria in soil or root nodules. Lightning also converts nitrogen gas to nitrate compounds.

2. Nitrification - Ammonia is converted to nitrates by nitrifying bacteria in the soil.

3. Assimilation - Plants absorb nitrates from the soil and use them to make proteins. The plant is then eaten by an animal and are used to produce animal protein.

4. Ammonification- Decomposers break down the bodies of dead organisms, urine and faeces converting them to ammonia in the soil, which is then converted to nitrates by nitrifying bacteria.

5. Denitrification - Denitrifying bacteria in the soil break down nitrates and return nitrogen back to the air.

From the above stages and the options provided, the correct option is A - nitrates from the nitrogen cycle is converted to protein by plants.

Evolution Quick Check
Which of the following principles is NOT part of Darwin's theory of evolution by natural selection?

Answers

Answer: (You were right!) C. Mutations are the ultimate source of genetic variation.

Evolution is the biological and chemical changes that occur over generations that results in the variation of the observable traits in the organism. According to Charles Darwin evolution happened because of natural selection and many other factors.

Mutations are the ultimate source of genetic variation.

What did Darwin's theory state?

Charles Darwin gave the theory of evolution and natural selection in which the major points were variation, lineage, preference and duration.

According to his theory mutations are not the ultimate source of the genetic variations as natural selection and many other factors play roles in the variation and speciation.

Therefore, option C is correct and is not part of the theory.

Learn more about Darwin's theory here:

https://brainly.com/question/9035409

The father of two children is type 0+, and the mother is type A+. The children are O- and A+.
Given this information, what can you say about the genotypes of father and mother?

Answers

The father and mother both heterozygous gene that is Blood type A and O so mother is AO and father also AO so crossing over will get AA, AO or OO.

I really need help in biology please

Answers

Answer:

What is the genotype for a h0m0zygous dominant plant? PP

What is the phenotype? Purple plants

What is the genotype for a h0m0zygous recessive plant? pp

What is the phenotype? White plants

What is the genotype for a heterozygous plant? Pp

What is the phenotype? Purple plants.

What is the genotype for a h0m0zygous dominant for freckles? FF

What is the phenotype? Freckles

What is the genotype for a h0m0zygous recessive for freckles? ff

What is the phenotype? No freckles

What is the genotype for a heterozygous individual for freckles? Ff

What is the phenotype? Freckles.

Each individual has two alleles for a given gene.

For example, the allele dimples are dominant. How would you represent this allele? With capital letters, for example, DD.

The allele for no dimple is recessive. How would you represent this allele? With lowercase letters, for example, dd.

The allele for brown eyes is dominant. How would you represent this allele? With capital letters, for example, BB.

The allele for blue eyes is recessive. How would you represent this allele? With lowercase letters, for example, bb.

PP: h0m0zygous dominant; Yy: heterozygous; Ss: heterozygous; bb:h0m0zygous recessive; FF: h0m0zygous dominant

Explanation:

Every being, such as plants, animals, or humans, have two different copies of a gene. These are alleles. These copies can be dominant or recessive.

Dominant genes are the ones that we will see. They "hide" the recessive gene. Recessive genes are the ones that we will only express if the two alleles are recessive since there is no dominant gene that hides the other.

Genotype is the genes that an individual or animal has. We can not see it. For example, a person can have a dominant trait for blue eyes and a recessive trait for brown eyes (Bb)s. In other words, it is the genetic information that a person carries. The phenotype is what we can see of a trait. Following the previous example, the dominant trait is blue eyes, and the recessive is brown, so the gene that will express itself is blue eyes, and we will able to see it.

The pair of alleles can be h0m0zygous and heterozygous. H0m0zygous is when the two traits are the same, for example, BB or bb. Heterozygous is when the traits are different, like, Bb.

Pea plants have two flower varieties where purple is dominant over white. The dominant trait, we represent it with a capital letter, in this case, P, because it is the first letter in purple. The recessive trait we represent it with a lowercase letter, in this case, p.

The genotype for a h0m0zygous dominant plant would be PP. We have to remember that the genotype is the information that the plant carries. If this information is h0m0zygous, it means the two alleles are the same, and if they are both dominant, we write capital letters. The phenotype is what we can see of the information; the gene that it is expressed, in this case, would be the color purple.

A h0m0zygous recessive plant has two alleles with the same information, and as they are recessive, we write two lowercase letters (pp). The genotype would be white plants since there is no dominant allele that covers the recessive one.

In a heterozygous plant, the traits are different. We have the dominant trait purple (P) and the recessive trait white (p). The dominant is the one that will express itself and the one that we will be able to see, see in a purple plant.

The following questions are similar to the first one. We know that freckles are a dominant trait, so we use a capital letter to represent it (F) and a lowercase letter to portrait the recessive trait, which is no freckles (f).

A h0m0zygous dominant means that the two alleles are the same and that one does not hide the other so, the genotype would be FF, and the phenotype would be a person with freckles.

If the person is h0m0zygous recessive, it means that it has the same traits, but one allele does not hide the other. The genotype would be ff, and the phenotype would be no freckles.

In the last case, the person is heterozygous, which means that it has one dominant and one recessive allele. The dominant allele will express itself; the genotype would be Ff, and the phenotype freckles.

In the following questions, we know that we represent dominant alleles with capital letters and recessive ones with lowercase letters, if it is a dominant allele for brown eyes, we write BB, taking the first letter of the dominant trait, in this case, brown. If it is a recessive trait, we write lowercase letters, in this case, bb for blue eyes.

In the last set of questions, we have to observe the letters to find the genotype.

PP, FF: the two letters are the same, which means that the allele is h0m0zygous. Also, they are both in capital letters, so they are dominant traits. Yy, Ss: the two letters are different, one is in capital letters, and the other is not. The allele is heterozygous. bb: the two letters are the same, so they carry the same information. They are h0m0zygous. Both of them are in lowercase, so they are recessive alleles.

what is calcination and roasting?​

Answers

Answer:

Explanation:

Calcination is a process in which ore is heated in the absence of air or air might be supplied in limited quantity. Roasting involves heating of ore lower than its melting point in the presence of air or oxygen. Calcination involves thermal decomposition of carbonate ores.

3. Describe how the protein's Structure and/or Function are changed.

Answers

Answer:

The gene, or sequence of DNA, ultimately determines the unique sequence of amino acids in each peptide chain. A change in nucleotide sequence of the gene's coding region may lead to a different amino acid being added to the growing polypeptide chain, causing a change in protein structure and therefore function.

Explanation:

How is an ecosystem’s biodiversity a measure of its health?

Answers

Biodiversity is a measure that combines richness and evenness across species. It is often measured because high biodiversity is perceived a synonymous with ecosystem health. Diverse communities are believed to have increased stability, increased productivity, and resistance to invasion and other disturbances. Hope this helps! Mark brainly please!

When an organism fights with another organism over a limited resource it is called?
A. carrying capacity

B. symbiosis

C. competition

D. predator-prey relationship

Answers

C. Competition: fight between the two animals over food or any resource

Plants and animals are part of the ______________ group

Question 1 options:

Eukaryota


Bacteria


Archaea


Rodent

Answers

Answer: Eukaryota are organisms with nucleus within cells.

Explanation: Animals, Plants, Fungi, and Protists are all part of Eukaryota.

DUE SOON PLZ HELPP!!!!!!!!
Which of the following is an example of a step in an EXPERIMENTAL scientific investigation?


A. Recording the sound of a test tube breaking

B. Placing test tubes in a water bath

C. Nothing a color change in a test tube

Answers

the correct answer is A. Recording the sounds of a test tube breaking

Please answer me what’s the answer for this ?

Answers

Answer: Gene flow my man

Explanation:

What's something you liked or found interesting about any one of the episodes of the aquarium? (Make sure to write at least 4 sentence).​

Answers

Answer:

An interesting episode of the aquarium I had was seeing a dolphin show. The dolphin was super smart, and I have to admit it was smarter than me. I mean I was like 3 when I went there so, I guess that is normal? Anyways, the dolphin was doing cool tricks like twist jumping, and even I tried it but failed. The dolphin went to the worker when the worker called its name. I learned that day that you shouldn't underestimate dolphins because they are smart.

Explanation:

This is an example, so do not copy. You may get inspired.

1 sentence:introduction(aka what you liked or found interesting stuff about the aquarium)

2-4 sentence:the main area(talking about what happened)

1 sentence:conclusion

Can you define these words?? Thanks!

Cellulose
Chlorophyll
Chloroplast
Bryophyte
Pterophyte
Gymnosperm
Cone
Angiosperm
Flower
Cuticle
Vascular tissue
Xylem
Phloem
Roots
Root hairs
Stems
Leaves
Photosynthesis

Answers

Answer:

Cellulose - It is described as a complex carbohydrate that forms the main constituent of the cell wall in most plants and is important in the manufacture of numerous products like pharmaceuticals, textiles, etc.

Chlorophyll - Any of a group of green pigments that are found in the chloroplasts of plants and in other photosynthetic organisms such as cyanobacteria.

Chloroplast - An organelle found in the cells of green plants and in photosynthetic algae, where photosynthesis takes place.  

Bryophyte - Any plant of the division Bryophyta, defined "sensu lato" to comprise the mosses, liverworts, and hornworts, and corresponding to all embryophytes that are not vascular plants.

Pterophyte - It is characterized as any fern(seedless plant) that is a division of Pteridophyta.

Gymnosperm - Any plant such as a conifer whose seeds are not enclosed in an ovary or those who don't bear seeds or fruits. Example; Cycads.

Cone - A cone-shaped flower head of various plants like banksias and proteas.

Angiosperm - Any flowering plant characterized by having ovules enclosed in an ovary and thus, produces fruits, as well as, seeds.

Flower - A reproductive structure in angiosperms and often conspicuously colorful and typically including sepals, petals, and either or both stamens and/or a pistil.

Cuticle - A noncellular protective covering outside the many invertebrates and plants.

Vascular tissue - The complex tissues that consist of various cell types and primarily responsible for transporting liquid and other nutrients throughout the plant or animal body.

Xylem - A vascular tissue in the land plants primarily responsible for the distribution of water and minerals that are taken up by the roots and also the key component of the wood.

Phloem - A vascular tissue in land plants primarily responsible for the distribution of sugars and the nutrients manufactured in the shoot.

Roots - The part of the plant which is generally underground that anchors and supports the plant body. It absorbs and stores water and nutrients, and in some plants is able to perform vegetative propagation.

Root hairs - The rhizoid of a vascular plant or a tabular outgrowth of a trichoblast, hair-forming cell on the epidermis of a plant root.

Stems - The above-ground stalk of a vascular plant that supports individual parts of a plant like leaves, flower, fruits, etc.

Leaves - The green and flat organ that represents the most prominent feature of the most vegetative plants.

Photosynthesis - The process by which plants and other photoautotrophs convert light energy into chemical energy. For example; Plants use air, water, along with sunlight to synthesize their food(carbohydrates and waste oxygen).

Young male chimpanzees look for mates outside of their own population. The males then take the females back to their group. Which of the following occurs in the original females' population?
A emigration
B immigration
C mortality
D natality

Answers

Answer:

D

Explanation:

2
Allele frequencies tend to remain the same
generation after generation unless acted
upon by outside forces. This is known as the
(3 Words)

Answers

Answer:

Hardy-Weinberg equilibrium

Explanation:

The Hardy-Weinberg law is established in it is that in a sufficiently large population, in which the matings occur randomly and that is not subject to mutation, selection or migration, the gene and genotype frequencies remain constant from generation to generation, once a state of equilibrium has been reached that is reached after one generation at autosomal loci. A population is said to be in equilibrium when alleles from polymorphic systems maintain their frequency in the population through generations.

3 poi
List the three types of heterotrophs in alphabetical order. Use commas.
Please do not use capital letters. Spelling counts.

Answers

Answer:

holozoic , saprophytic , parasitic

An
is like a tiny magnet because the electrons
spinning around its nucleus give the atom north and south
poles and a magnetic field.

Answers

The answer for this question is “Atom”. You can find the answer in Ck-12’s lesson on Ferromagnetic Material.

the law of reflection states that light will always reflect

Answers

Answer:

The law of reflection states that, on reflection from a smooth surface, the angle of the reflected ray is equal to the angle of the incident ray. ... The reflected ray is always in the plane defined by the incident ray and the normal to the surface.

Explanation:

The law of reflection states that, on reflection from a smooth surface, the angle of the reflected ray is equal to the angle of the incident ray. The reflected ray is always in the plane defined by the incident ray and the normal to the surface. The law of reflection can be used to understand the images produced by plane and curved mirrors.

lunar phases summary 2-4 sentences

Answers

Answer:

The 8 moon phases in order are New moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full moon, Waning Gibbous, Last Quarter, and finally Waning Crescent. The moon has phases the wanes, waxes, and even sometimes we can't even see the moon during its phase.

Explanation:

~Hope this helps

When is the carbon stored in plants released?
a. during cellular respiration
b. during photosynthesis
c. when they die
d. none of the above
Please select the best answer from the choices provided
Ο Α
B

Answers

Answer:

The answer is C.WHEN THEY DIE dont go with a or b both are wrong just did it rn

Explanation:

Question:"When is the carbon stored in plants released?" Answer:

The answer to this question is, C. When they die.

ExplanationEdge 2023

POST-lab Question:
What would be the effect on the butterfly population if the coloration in the environment suddenly changed? (Example: green
butterflies are living on a green plant that suddenly turns brown and loses all its leaves).​

Answers

Answer:

The butterfly population would decrease or die out.

Explanation:

If the population of the green butterfly had depended on these "green plants" or leaves, they would die out without them since they use these green plants to camoflauge and blend in with them. Its something they can use to hide away from predators, and be safe from them.

Name some harmful substances found in cigarette smoke. How do these
substances affect the respiratory and the circulatory systems?​

Answers

There are more than 7,000 harmful chemicals in tobacco smoke, at least 250 are known to be harmful. Some of these chemicals are:

Nicotine
Formaldehyde
Lead
Arsenic
Ammonia
Radioactive elements such as Polonium-210
Benzene

How some of those chemicals affect the body:

Nicotine is highly addictive and can cause an increase in blood pressure, heart rate, flow of blood to the heart and a narrowing of the arteries (vessels that carry blood).

Symptoms for formaldehyde are watery eyes; burning sensations in the eyes, nose, and throat; coughing; wheezing; nausea; and skin irritation

High levels of lead may cause anemia, weakness, and kidney and brain damage. Very high lead exposure can cause death.

Arsenic poisoning occurs over a brief period of time, symptoms may include vomiting, abdominal pain, encephalopathy, and watery diarrhea that contains blood. Long-term exposure can result in thickening of the skin, darker skin, abdominal pain, diarrhea, heart disease, numbness, and cancer.

High concentrations of ammonia in air causes immediate burning of the eyes, nose, throat and respiratory tract and can result in blindness, lung damage or death.

Tobacco smoke contains many chemicals that are harmful to both smokers and nonsmokers.


Acetaldehyde.


Aromatic amines.


Arsenic.

Benzene.


Beryllium (a toxic metal)


1,3–Butadiene (a hazardous gas)


Cadmium (a toxic metal)


Chromium (a metallic element)



what factors can change the population size?​

Answers

Answer:

Birth rate, death rate, and immigration of foreign species

The diagram shows a portion of the fossil record. Select ALL of the statements that are supported by the record. A) Life moved to land in layer 6. B) Layer 5. is older than layer 2. C) Fish were the first life forms. D) The oldest life existed in water. E) Shelled organisms existed before fish.

Answers

Answer:

D,E

Explanation:

biolofy help questions
help pls.

Answers

Answer:

2:a

3:b

Explanation:

Meiosis Produces 4 haploid daughter cells from a diploid mother cell. This is important for genetic variation when producing gametes (egg and sperm cell). Mitosis produce 2 diploid daughter cells that are exactly the same

Explain the difference between mitosis and meiosis.

Answers

Answer:

Mitosis involves the division of body cells, while meiosis involves the division of sex cells. The division of a cell occurs once in mitosis but twice in meiosis. Two daughter cells are produced after mitosis and cytoplasmic division, while four daughter cells are produced after meiosis

Explanation:

hope it hepl u

please heip i am giving away brainiliest for the best answer


Which substance produced by the immune system is involved in both active and passive immunity?


A. antibiotic


B. antibody


C.vaccine


d. mucus



no dam links

Answers

Answer: b

Explanation:

Answer:

B. Antibody

Explanation:

Trust me I've learned this is middle school

What type of physical evidence is acquired through the senses

help quick

Answers

Answer:

Empirical evidence is information acquired by observation or experimentation.

Explanation:

I hope it will help you

Chain Pickerel is a freshwater fish that is a member of the pike family. Chain Pickerels are found along the Eastern coast of answers - The dissolved oxygen of the water decreases

The salinity of the water decreases

The amount of light penetrating the water increases

The temperature of the water increases in the summer
question - Florida all the way around to Texas. Sometimes called a "jack fish" or a "southern pike," pickerel feed mainly on smaller fish, ambushing them with sharp teeth. These fish are often found throughout the state of Florida in rivers, lakes and creeks. Spawning occurs in late winter to spring among heavy aquatic weed growth or flooded grasses, in water from a few inches deep to several feet deep. Large number of adhesive eggs are scattered over vegetation. Based on this information, which of the following scenarios would impact the population of Chain Pickerel and cause a decrease in the population size?

Answers

Answer:

the dissolved oxygen of the water decreases.

the fish need the oxygen for respiration, breathing through their gills.

Explanation:

The salinity decreasing doesn't affect the pickerel, because it's a freshwater fish. no salt needed.

more light penetrating the water just means that more aquatic weed or grasses would grow, giving the pickerel more area to spawn their eggs.

temperature increase in the summer has no affect on the fish, since the spawning happens in late winter.

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