Which diagram correctly represents a step in the normal process of human reproduction?
Key
2n = total genetic material of a human cell
n
= one half of the total genetic material of a human cell
Answers
Answer:c
Explanation:
The diagram that correctly represents a step in the normal process of human reproduction is n + n = 2n (Option C).
Meiosis is a reductional type of cell division that produces four daughter haploid cells.These meiotic haploid (n) cells are known as gametes or germinal cells.During fecundation, two different germinal cells fuse to produce a diploid zygote.In conclusion, the diagram that correctly represents a step in the normal process of human reproduction is n + n = 2n (Option C).
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Answer:
6
Explanation:
Answer:
B
Explanation:
If the shaded part is the trait then half would only be carriers and would not actually have the trait. It would need to be fully shaded. So only 4.
What role does the esophagus play in the human body and what is its importance in the human body
Answers
Answer:
the esophagus is a highway for food and drink to travel along to make it to the stomach.
Explanation:
Answer:
y
Explanation:
what happens when an atom has lost an electron comes in contact with an atom that has gained an electron?
Answers
Answer: When an atom that has lost an electron comes in contact with an atom that has gained an electron, usually the the two atoms would attract each other and form a compound. This compound would be ionic since it is governed by ionic bonding.
Explanation:
What do the D and T in ADP and ATP mean?
Answers
Answer:
Are you talking about a chemical compound?
because if you are then T in ATP would be triphosphate.
Meanwhile D is Diphosphate.
What state(s) of matter would you find between points D and E?
Answers
Answer:
gases
Explanation
The cellular mechanism that determines the independent assortment of maternal and paternal chromosomes is: Please choose the correct answer from the following choices, and then select the submit answer button. determined by their dominant or recessive inheritance pattern. separation of sister chromatids at anaphase II of meiosis. separation of sister chromatids at anaphase I of meiosis. separation of homologous pairs at anaphase II of meiosis. separation of homologous pairs at anaphase I of meiosis.
Answers
Answer:
separation of homologous pairs at anaphase I of meiosis.
Explanation:
Independent assortment law establishes that the alleles from two or more different genes distribute in gametes independently from each other. In other words, a gamete receives an allele from a gene that does not depend or influence the allele of another gene in the same gamete. This random distribution can only be applied to independent genes. These genes segregate independently after crossing over because they are located far away from each other.
When cell division is going on by meiosis, it involves the random and independent segregation of the alleles. During anaphase I (meiosis), the pairs of homologous chromosomes separate independently of each other. Each integrant of the homologous pair migrates to opposite poles of the cell. This separation generates different chromosomal combinations in the daughter cells. The process is as follows.
During metaphase I, homologous pairs together migrate to the equatorial plane, where they randomly aline with their kinetochores facing opposite poles. The random arrangement of tetrads is different in every cell going through the meiosis process. There is no equal alinement between two cells. When tetrads aline in the equatorial plane, there is no predetermined order for each of the homologous chromosomes of each tetrad to face one of the poles and then migrate to it while separating. Any chromosome of the homologous pair might face any of the poles and then migrate to it. Each of the chromosomes has two possibilities for orientation at the plane. During anaphase I, each of the homologous chromosomes migrate to the corresponding pole. When the new haploid cells are formed, the number of variations in each cell is also different and depends on the chromosomes that form that cell. This random order in the equatorial plane is what introduces variation into the gametes. It is almost impossible that two gametes resulting from meiosis will get the same genetic charge.
Which choice best describes an independent variable in a scientific investigation?
An independent variable is the one variable changed and tested by a scientist in a scientific investigation.
An independent variable is an educated guess that a scientist makes after observing something interesting.
An independent variable is one part of the hypothesis a scientist writes prior to beginning a scientific investigation.
An independent variable is the fastest way to measure the success of a scientific investigation.
Answers
Answer:
A
Explanation:
independent variable is the one variable changed and tested
Help please!:) brainliest involved ofc
Answers
Which areas of the ocean experience the greatest variation in salinity?
Answers
Answer:
The Atlantic ocean is the saltiest
The student wants to make a model to provide information about cellular respiration. Drag and drop the
responses below to complete the model.
carbon dioxide and water
chemical bonds
energy released
glucose and oxygen
mitochondria
Answers
Answer:
where? mitochondria
inputs. carbon dioxide and water
outputs. glucose and oxygen
energy resources. chemical bonds
energy result. energy released
im not sure but hope this helps :)))
Why are there more colorblind males than females
Answers
Answer:becuase
Explanation:
To fill out the chart on nonrenewable and renewable natural resources, should Hector add trees under the heading "Renewable
Resources"?
A)
No. Trees can die from disease.
B)
Yes. There are many uses for trees.
C)
Yes. Trees can be cut down but planted again.
D)
No. There is only so much land for trees to grow.
Answers
Answer:
c
Explanation:
the market for wood furniture and other products are on high demand so cutting down and planting again will help in availability and good weather
2. What is the change (mutation) in DNA?
Answers
Answer:
A mutation is a change in a genetic sequence. Mutations include changes as small as the substitution of a single DNA building block, or nucleotide base, with another nucleotide base. Meanwhile, larger mutations can affect many genes on a chromosome. Along with substitutions, mutations can also be caused by insertions, deletions, or duplications of DNA sequences.
Explanation:
Some mutations are hereditary because they are passed down to an offspring from a parent carrying a mutation through the germ line, meaning through an egg or sperm cell carrying the mutation. There are also nonhereditary mutations that occur in cells outside of the germ line, which are called somatic mutations. Mutations can be introduced due to mistakes made during DNA replication or due to exposure to mutagens, which are chemical and environmental agents that can introduce mutations in the DNA sequence, such as ultraviolet light. Some mutations do not result in changes in the amino acid sequence of the encoded protein and can be described as silent mutations. Other mutations result in abnormal protein products. Mutations can introduce new alleles into a population of organisms and increase the population's genetic variation.
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What does the dotted lines on this cladogram represent?
Answers
Explanation: hope this is helpful :))
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How do mutations occur in the genetic code? This represents crossing over during meiosis.
a) During DNA replication, the original DNA strand GTC ACA GGC ATC is copied into complementary strand CAG CCG TAG. This is an example of deletion.
b)Mutations can only occur when passed on thorough reproduction. The majority of mutations are the result of exposure to mutagens.
c)A woman who has sickle cell anemia passes this disease on to her offspring. This means that the mutation for sickle cell anemia MUST occur in the woman’s gametes.
d)Mutations can be silent and not affect the organism that has them
Answers
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Which of the following claims correctly describes a kingdom of Domain Eukarya?
A. Kingdom Protista includes single-called organisms that lack nuclei
B. Kingdom plantae includes multicellular organisms that can move independently
C. Kingdom animalistic includes multicellular organisms that make their own food
D. Kingdom fungi includes organisms that get energy by decomposing materials in their environment
Answers
Answer:
D
Explanation:
1. protists have nuclei
2. plants don't move independently
3. animals don't make their own food
so option D is the best option
good luck
The following claims correctly describes a kingdom of Domain Eukarya is Kingdom fungi includes organisms that get energy by decomposing materials in their environment.
What are the main features of the Fungi kingdom?Fungi are heterotrophic and eukaryotic organisms that can be unicellular or multicellular. The vast majority of species are filamentous, and these filaments are called hyphae. Some fungi are formed by several densely packed hyphae, which form the so-called mycelium.
The Fungi Kingdom is represented by unicellular or multicellular eukaryotic organisms, being found in the most diverse types of environments. Fungi include mushrooms, molds, wood ears, lichens, among other organisms.
See more about Fungi Kingdom at brainly.com/question/11829903
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Why do single-celled organisms divide?
A.to repair damaged cells
B.to transmit genetic material by reproduction
C.to reduce the number of chromosomes in the cell
D.to increase the number of chromosomes in the cell
Answers
Answer:
C
Explanation:
Single-celled organisms use cell division as their method of reproduction
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Answers
Planets like Jupiter, Neptune, Saturn, and Uranus all are made up of hydrogen and helium.
How many divisions take
place during meiosis in
order to produce the four
haploid (reproductive)
cells?
A. two
B. one
C. four
Answers
Answer:
two cell divisions happen throughout the overall process, so a result of four haploid cells are produced.
Explanation:
A because it consists of two nuclear divisons resulting in four nuclei that are usually turned into four new haploid daughter cells
15 POINTS + BRAINLY the answer selected is wrong
Answers
Answer:
I think it's the second option
Correct me if i'm wrong but i hope i helped! xoxo
I think weirdly, but what i am thinking is that since A has more molecules but it’s at the same level as B, then that means if you give B more molecules, then it will be higher because it requires less.
Sorry if i’m wrong, but hope this helps!
Errors that occur during meiosis are present in all cells of the body, whereas errors that occur during mitosis may occur in only a small number of cells.
Answers
Answer:
Due to difference in their presence in the body.
Explanation:
Errors that occur during meiosis are present in all cells of the body because meiosis cell division occurs in the sex cells of an organisms so that the errors are effects all the cells of that organism, while on the other hand, errors that occur during mitosis may occur in only a small number of cells because mitosis cell division occurs in the somatic cells so the errors are present in some body cells so we can conclude this errors in meiosis affect all cells whereas errors in mitosis affect less number of cells.
why are manure better than fertilizers
Answers
Manure is better than fertiliser. Manure is derived naturally and adds a lot more than just nutrients to the soil. They increase the activity of the microbes in the soil and increase its fertility. On the other hand, fertilisers harm these microbes and cause health issues in the consumers since they are synthesised chemically.
Light travels through the eye by entering through the protective layer called the cornea (17). It then moves through the opening of the pupil which is surrounded by the iris (18), which is a muscle. It will then go through the transparent structure behind the pupil known as the ______________(19) that changes shape to help focus images on the retina in a process known as ________________ (20) The retina contains the photoreceptors known as the _________________(21) and ________________(22). It is there that the actual process of transduction occurs when the photoreceptors excite the ________________(23) cells which in turn send the message on to the _______________(24) cells whose axons make up the optic nerve. The information will then travel to the ____________________(25), which is the sensory switchboard within the brain and end up in the ____________________ (26) lobes where the information is processed specifically within the primary ____________________cortex (27).
Answers
Answer:
The correct answer is - 17) Cornea , 18) Iris , 19) Lens, 20) Accommodation , 21) Rods, 22) Cones, 23) Bipolar, 24) Ganglion , 25) Optic Nerve, 26) Occipital, 27) Visual.
Explanation:
The protective layer called the cornea that allows light to enter travel through it to the eyes. Light moves through the pupil surrounded by the muscle called the iris and travels through the lens, a transparent structure that changes its shape on the basis of the intensity of light to help focus images on the retina during the accomadation process. Photoreceptors that are present in the retina are called cones and rods.
The process of transduction takes place when these photoreceptors excite bipolar cells to send signals or messages to the ganglion cells that have axons that make the optic nerves, the sensory switchboard within the brain, and get the messages sent by the photoreceptors. These optic nerves end in occipital lobes where all the signals and messages are processed specifically within the region called the primary visual cortex.
I asked this question yesterday and no one responded so I'm asking it again. BTW this is my bio homework. Thank you
Answers
Answer:
figure 18 is equal to 16
Explanation:
The ovaries release the female gamete each month.
True
False
Answers
I also need help with this question
Answers
Answer:
the gastric chief cell
Explanation:
produces pepsin in stomach
which region has the second largest ecological footprint?plz help me
Answers
Directions: Answer the questions below. In order to earn full points students must have original descriptions, labels, and drawings/sketches of their own ideas. Images copied/pasted from our models, online, or searches will not count.
1) Draw/sketch and describe what the structure of DNA is [5pts]
2) Draw/sketch and describe how DNA Replicates. Make sure to label important players involved [5pts]
3) Describe Transcription [3pts]
4) Where does transcription take place in the cell? [2pts]
Answers
4) Transcription is the first step in gene expression. It involves copying a gene's DNA sequence to make an RNA molecule. Transcription is performed by enzymes called RNA polymerases, which link nucleotides to form an RNA strand (using a DNA strand as a template).
What are the 3 main layers of the Earth?
а.
b.
C.
Answers
Answer:
the crust
the core
the mantle
Explanation:
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please help with my biology
Answers
Answer:
Reptiles, like early dinosaurs.