Answer:
In somatic cells, 16 chromosomes are present whereas in sex cells, there is 8 chromosomes.
Explanation:
In the somatic cells, the replication of chromosomes occur and after the replication is completed, the parent cell is divided into two daughter cells having double number of chromosome by each daughter cell i.e. 16 chromosomes while on the other hand, in sex cells, first the parent cell divides into two daughter cells and after sometime, these daughter cells are again divided having total four daughter cells each receives half number of chromosomes i.e. 8 chromosomes.
Dark skin ( a result of increased melanin production in equatorial populations), is likely a response to ultraviolet radiation because UV radiation causes:
Answer: Skin cancer
Explanation:
Melanin is a pigment derived from an amino called acid tyrosine. The most common form of melanin is called eumelanin, which is a polymer of dihydroxyindole carboxylic acids and their reduced forms. When a person is exposed to the ultraviolet light (UV) from the sun, the melanocytes will produce eumelanin to prevent the skin from burning and damage to the cell nuclei (where DNA is found) of the epidermis. This melanin production causes the skin to darken. The eumelanin in the skin then acts as a natural sunscreen by blocking the damaging effects of sunlight. So, skin darkens when exposed UV light, thus providing greater protection when needed by producing more eumelanin, but it also becomes more likely to develop melanoma, which is a type of skin cancer. This is because UV rays damage the DNA of skin cells. The DNA (deoxyribonucleic acid) is the genetic material that has the instructios to the growth and functioning of an organisms). Skin cancers begin when eumelanin protection is not sufficient and this damage affects the DNA of the genes that control the growth of skin cells. This results in a tumor, which is the uncontrolled growth of cells (in this case, skin cells) because there will be a mutation in DNA that affects the function of the cells.
how do humans impact the biodiversity of ecosystems
Answer:
Humans affect biodiversity by their population numbers, use of land, and their lifestyles, causing damage to habitats for species. Through proper education, and by demanding that governments make decisions to preserve biodiversity, the human population will be able to sustain life on earth longer.
Explanation:
Human population levels, land usage, and lifestyles all have an impact on biodiversity, causing damage to species' habitats. The human population will be able to maintain life on Earth for longer if adequate knowledge is provided and governments are forced to make decisions that protect biodiversity.
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How do you explain Meiosis?
Answer:
Chromosome pairs with its corresponding homologous chromosome to form a tetrad.
Which of the following is correctly defined?
A. Ecosystem - A group of conspecific organisms.
B. Population - An individual life form.
C. Community - A group of populations.
D. Population - A group of communities.
I need help!!1
Answer:
both b and c I think..........
Population - An individual life form. and Community - A group of populations.
What is population?A population is the entire set of people in a group, whether that group is a country or a collection of people who share a certain trait.
A population is the group of people from which a statistical sample is taken in statistics. Therefore, a population is any collection of people who have something in common.
A statistically significant portion of a population, rather than the full population, may also be referred to as a sample. For this reason, the standard deviation, or standard error, of a statistical study of a sample from the full population must be disclosed.
Therefore, Population - An individual life form. and Community - A group of populations.
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protid không phải là thành phần của
An example of a pressure vessel is
Answer:
A closed container designed to hold gases or liquids at a pressure substantially higher or lower than the ambient pressure
How is it possible for mad made things to move?
Regarding the "East Side Story" hypothesis, what would paleoanthropologists need to show that it was false?
Answer:
Evidence of fossil apes and hominids in both East and West of the great rift valley
Explanation:
The East Side Story hypothesis opined that a tectonic plate movement created a seismic split in the earth, thus deepened the rift valley and created a geographical barrier between the east and the west of the great rift valley. The barrier created a kind of geographical isolation between the ancestors of hominids, dividing them into two with each population taking different evolutionary paths.
Thereafter, the ancestors in the western side of the rift valley evolved into the chimpanzee's family while those in the eastern side ultimately evolved into humans.
Thus, providing the fossils of apes and that of hominids in both East and West sides of the great rift valley will render the hypothesis invalid.
Which definition best describes an acid?
I know It is c hope is helps!
Explanation:
An acid is any substance that in water solution tastes sour, changes blue litmus paper to red, reacts with some metals to liberate hydrogen, reacts with bases to form salts, and promotes chemical reactions (acid catalysis)
Explain how animals may have influenced the evolution of terrestrial plants and vice versa
How are the workings of receptor in human body related to the sensors in a car listed below?
A. Light:
B. Touch:
C: Sound:
D: Speed:
dialogue between two friends planning a road trip
What must happen before meiosis can begin ?
which structures are found in typical prokaryotic cells and also in typical plant cells
a) cell walls
b) histones
c) telomeres
d) tonoplasts
Answer:
a. cell wall
pls Mark brainliest
what is the total number of bones in the skeleton system
Answer:
Bones provide the structure for our bodies. The adult human skeleton is made up of 206 bones.
OAmalOHopeO
is it possible that after the first meeting of male and female through sexual inter course
the female become pregnant after the sex??
Answer:
Yes, it is possible because, if the sperm from the male goes into the egg of the female it can cause the female to get pregnant by that male. And its very rare for the female not to get pregnant after having inter course with the male. That's only if they had unprotected sex.
I hope this helps you!
XoXo Mashayla
Explanation:
Chordates have a chord in the back for support. In animals with vertebrates, the
chord itself becomes the
Answer:
1
Explanation:
Membrane proteins: are sometimes covalently attached to lipid moieties. are sometimes covalently attached to carbohydrate moieties. are composed of the same 20 amino acids found in soluble proteins. diffuse laterally in the membrane unless they are anchored All of the answers are correct.
Answer: All of the answers are correct.
Explanation:
Membrane proteins are sometimes covalently attached to lipid moieties. They're also composed of the same 20 amino acids found in soluble proteins and diffuse laterally in the membrane unless they are anchored. They're sometimes covalently attached to carbohydrate moieties as well.
Therefore, the correct option is All of the above.
What is NOT an effect of growth hormone?
a. Growth hormone directly stimulates osteoblasts in the periosteum to promote appositional growth.
b. Growth hormone increases the rate of mitosis in the epiphyseal plate of growing bones.
c. Growth hormone promotes the closure of the epiphyseal plate.
d. Growth hormone increases the activity of osteogenic cells.
C. Growth hormone promotes the closure of the epiphyseal plate.
The closure of the epiphyseal plate is NOT an effect of growth hormone (option c).
The epiphyseal plate is a layer of hyaline cartilage between the epiphyses and metaphyses at the ends of long bones.
The epiphyseal plate is completely closed when bone growth is completed (around age 18 to 21 years).
Different hormones (i.e., testosterone and estrogen) released at puberty initiate the closure of epiphyseal plates.
In conclusion, the closure of the epiphyseal plate is NOT an effect of growth hormone (option c).
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At a birthday party, a teen decides to inhale some of the helium from a nearby balloon using his mouth. Before the helium gas reaches his right and left lungs, through which order of structures will it flow?
A. Oral cavity to the oropharynx to the trachea to the right and left main bronchi.
B. Oral cavity to the trachea to the trachea to the nasopharynx to the right and left main bronchi.
C. Oral cavity to the right and left main bronchi to the trachea to the oropharynx.
D. Oral cavity to the trachea to the larynx to the right and left main bronchi.
E. Oral cavity to the nasopharynx to the trachea to the right and left main bronchi.
Answer:
D. Oral cavity to the trachea to the larynx to the right and left main bronchi.
Explanation:
The respiratory system may be a system consisting of specific organs and structures used for gas exchange in animals and plants.
What is the process of respiration?We have a pair of external nostrils opening out above the upper lips. It results in a nasal chamber through the nasal passage. The nasal chamber opens into the pharynx, some of which are the common passage for food and air. The pharynx opens through the larynx region into the trachea.Trachea is a straight tube extending up to the mid-thoracic cavity, which divides at the extent of the 5th thoracic vertebra into a right and left primary bronchi. Each terminal bronchiole gives rise to a variety of very thin, irregular-walled, and vascularized bag-like structures called alveoli. The branching network of bronchi, bronchioles, and alveoli comprise the lung.
Thus, we can conclude that the correct option is (e).
The oral cavity to the nasopharynx to the trachea to the right and left main bronchi.
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What fraction of the progeny of the cross BbTt x BbTt will have black fur and long tails?
A) 0/16
B) 1/16
C) 3/16
D) 9/16
E) 16/16
Answer:
plzzzz upload a full picture
In most unsaturated fatty acids found in animal fats, vegetable oils, and biological membranes, the cis isomer predominates. true false
Answer:
The correct answer is - true.
Explanation:
Most unsaturated fats are oils and normally are biological membranes or plant-based such as vegetables. These fats mostly have cis isomer in them. Unsaturated fats help to lower blood cholesterol levels.
However, few oils show saturated fats but these are few in number, the majority are made up of unsaturated fats that have double bonds.
What is an ecosystem?
purple flower = P
white flower = p
round seed = R
wrinkled seed = r
look at the punnett square and list the genotypes that would correspond to each phenotype
purple flowers, round seeds:
purple flower, wrinkled seeds:
white flowers, round seeds:
white flowers, wrinkled seeds:
Answer: this is a long one lol
Explanation:
purple flowers and round seeds could be both PPRR and PpRr because it's both dominant traits and heterozygous genotypes still show the phenotype of the dominant gene. purple flower and wrinkled seeds would be PPrr or Pprr for the same reason. white flowers and round seeds would be ppRR or ppRr, and finally white flowers and wrinkled seeds would be pprr. hope this helped :)
1.) Citrus Red Mites can disperse to other locations by ______.
Choose the best answer.
a. crawling and roping.
b. using their wings to fly.
c. egg expulsion shot into other plants.
d. being carried by other insects.
2.) Mark all correct answers.
The mouth parts of insects are important for these reasons.
They can help us identify the insects
They tell us how they feed on a plant
What show the sort of damage they cause.
The kinds of disease they spread.
Answer:
A crawling and roping
They can help us identify the insect
in order for polar compounds to enter into the hydrophobic space of phospholipid tails, it would need to break the many ___ bonds
Answer:
In order for polar compounds to enter into the hydrophobic space of phospholipid tails, it would need to break the many hydrogen bonds
Explanation:
In the presence of water, the hydrophobic tails tend to interact with each other, creating a hydrophobic space from which water is excluded and in which other hydrophobic molecules can be trapped, while the polar head interacts with water, and is solvated, preserving the hydrophobic part from all contact with water. For a hydrogen bridge to form, a molecule that has hydrogen attached to an atom of high electronegativity and another molecule that has another electronegative atom with high electron density (that is, a negative partial charge) is required. Water molecules in the bulk of the body of water maintain multiple interactions with other molecules through an extensive network of hydrogen bridges, so for polar compounds to enter, it would be necessary to break many of these bonds.
A cell membrane has permeability, which means that the membrane?
If the entire mRNA sequence for a polypeptide was AUGUACUCGCGACCGUAA, how many amino acids does the polypeptide have
Answer:
5 amino acids
Explanation:
The process of translation involves synthesizing a sequence of amino acids from a mRNA template. The mRNA molecule is read in a group of three nucleotides called CODONS. A codon specifies or codes for an amino acid.
In the question, a mRNA sequence was given as follows: AUGUACUCGCGACCGUAA. From this sequence comprising of 6 codons, 5 possible amino acids will be contained in the polypeptide encoded by this mRNA molecule as the last codon (UAA) is a STOP codon. The following are the codons in the mRNA sequence and their respective amino acids:
*AUG- methionine (met)
*UAC - tyrosine (Tyr)
*UCG - Serine (Ser)
*CGA - Arginine (Arg)
*CCG - Proline (Pro)
*UAA - Stop
What trait are narcissists likely to have that is associated with leader emergence but not effectiveness
Answer:
Agreeableness.
Explanation:
Agreeableness is the trait that narcissists likely to have which is negatively corelated and is associated with leader emergence but not effectiveness. The tendency toward self-interest would attract the person into follow his or her own goals rather than the interests of their group or company. The term Narcissism originated from Greek mythology, where a young man whose name is Narcissus fell in love with his own image reflected in a pool of water so that's why selfness and self interests refers to Narcissism.
If 23 molecules of glucose are catabolized, how many molecules of ATP are produced (via substrate level phosphorylation) by the TCA cycle? How many FADH2 molecules and NADH molecules are produced by the cycle?
Answer:
A
If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
B
If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
C
If Assertion is true statement but Reason is false, then mark (3)
D
If both Assertion and Reason are false statements, then mark (4)
Explanation:Substrate-level phosphorylation is a type of metabolic reaction that results in the formation of Adenosine Triphosphate (ATP) of Guanosine Triphosphat (GTP) by the direct transfer and donation of a phosphoryl (PO3) group to Adenosine Diphosphate (ADP) of Guanosine Diposphate (GDP) from a phosphorylated reactive intermediate.
In glycolysis substrate level phosphorylation occurs in following two reactions
(i) 2molecules of 3-phosphoglyceric acid react with 2 molecules of ADP to from 2 molecules of 3-phosphoglyceric acid and 2 molecules of ATP.
1,3−diphosphoglyceric2 mol eculesacid+2ADP−→−−−−−−−−phosphotransferaseMg2+2−phosphoglyceric2mol eculesacid+2ATP
(ii) 2 mol ecules of phosphoenolpyruvic acid reacts with 2 mol ecules of ADP to from 2 mol ecules of pyruvic acid and 2ATP.
1−phosphoenolpyruvic acid2mol ecules2ADP−→−−−−−−Pyruvic kinaseMg2+Pyruvic acid2mol ecuels+2ATP
