Answer:
The correct answer is - a, b, c, d, g and h.
Explanation:
DNA and RNA both are nucleic acids and have considered genetic materials. There are certain difference in these molecules such as-
Different sugars present in the nucleotide, Deoxyribose sugar in DNA and ribose sugar in RNA.
There are different nitrogenous bases also present as RNA has uracil instead of thymine.
DNA normally found in double-stranded while RNA exists in single-stranded.
The term "evolution" is best described as A) a process of change in a population through time B) a process by which organisms become extinct C) the reproductive isolation of members of certain species D) the replacement of one community by another
Answer: A) a process of change in a population through time
Explanation:
Answer:
A
Explanation:
Evolution is a process of change in a population through time
A series of two-point crosses among fruit flies is carried out between genes for brown eyes (bw), arc wings (a), vestigial wings (vg), ebony body color (e), and curved wings (cv). The following number of nonrecombinant and recombinant progeny were obtained from each cross:
Genes in cross Progeny (NR) Progeny (R)
a,bw 2224 117
a,cv 2609 823
a,e 3200 3200
a,vg 5172 2379
bw,cv 4614 1706
bw,e 4150 4150
bw,vg 2796 1434
cv,e 3116 3116
cv,vg 2102 305
vg,e 4559 4559
Using these data from two-point crosses, what it the best genetic map (in m.u.) that can be developed?
A) cv 5 bw 13 a 34 vg with e assorting independently
B) bw 5 cv 24 vg 32 a with e assorting independently
C) a 5 bw 13 vg 24 e with vg assorting independently
D) cv 13 bw 5 a 27 vg with e assorting independently
E) bw 5 a 24 cv 13 vg with e assorting independently
Answer:
E) bw 5 a 24 cv 13 vg with e assorting independently
Explanation:
Due to technical problems, you will find the complete explanation in the attached files
What is an organism’s niche?
1) the physical environment of the organism
2) the role that an organism plays in the environment
3) the traits that increase an organism’s survival
4) the competitors and predators of the organism
How is the equilibrium of an ecosystem maintained?
Answer:
Biodiversity provide stability to the ecosystem and maintains the ecological balance. Plants and animals in ecosystem are linked to each other through food chain and food web. The loss of one species in the ecosystem affects the survival of other species. Thus the ecosystem becomes fragile
Explanation:
.
6. Describe/explain the primary and secondary/memory response of the adaptive immune system. Tell which antibodies appear and in what time frame.
Answer:
Immune responses to antigens may be categorised as primary or secondary responses. The primary immune response of the body to antigen occurs on the first occasion it is encountered. Depending on the nature of the antigen and the site of entry this response can take up to 14 days to resolve and leads to the generation of memory cells with a high specificity for the inducing antigen. The humoral response, mediated by B cells with the help of T cells, produces high-affinity and antigen-specific antibodies. This is in contrast with the CD8 T-cell response which leads to the generation of large numbers of antigen-specific cells that are capable of directly killing infected cells. Antigen-specific CD4 T cells, which provide help to B cells in the form of cytokines and other stimulatory factors, can also be expanded upon antigenic stimulation.
The secondary response of both B- and T cells is observed following subsequent encounter with the same antigen and is more rapid leading to the activation of previously generated memory cells. This has some quantitative and qualitative differences from the primary response.
Explanation:
GOOD LUCK!
How are abiotic factors in the ocean different from those on land?
Answer:
Biotic factors include plants, animals, fungi, algae, and bacteria. Abiotic factors include sunlight, temperature, moisture, wind or water currents, soil type, and nutrient availability. Ocean ecosystems are impacted by abiotic factors in ways that may be different from terrestrial ecosystems.
Explanation:
Hey mate,this is the correct one!
difference between incomplete and complete ventilation? any 4
Answer:
Due to exchange of gases i.e. normal and abnormal.
Explanation:
The main difference between incomplete and complete ventilation is the occurrence of normal and abnormal exchange of gases. The mechanism in which the exchange of gas happens completely without any difficulty is called complete ventilation. It is the process in which the required amount of oxygen is inhaled or inspired and appropriate amount of carbon dioxide is exhaled out of the body while on the other hand, incomplete ventilation is a mechanism in which exchange of gases is not normal.
Fungi of the phylum Basidiomycota form mycorrhizal
associations with orchids, a type of flowering plant.
How do these associations benefit both the fungi and
the orchids?
Answer:
The orchids derive nutrients from the association at very young stages of its life cycle while the fungi obtain water and organic matter
Explanation:
As stated in this question, fungi species belonging to the phylum Basidiomycota form mycorrhizal associations with a flowering plant called orchids. This relationship is a mutualistic one because both participants benefit from the relationship.
In this association, the young orchid plant relies on the mycorrhizal fungi's metabolism to get nutrients needed for its development in form of carbohydrates while the fungi in return gets water (from the roots of the plant) and organic matter.
which of the following are examples of mechanical erosion/weathering
A. Wind blowing sand
B. water flowing over rock
C. a plant's roots cracking
rock
D. none of the above
E. A & B only
Answer:
c. a plant's roots cracking rock
Answer:
C.) a plant's roots cracking rock
Which type of society has an economy primarily based on manufacturing
goods and products?
A. Hunter-gatherer
B. Industrial
C. Pastoral
D. Agrarian
Answer:
B. Industrial
Explanation:
Industrial society is the society that prospers under the name of machines and technology. In this type of society, mass production of goods and services are enabled. The use of fossil fuels help in the production of the goods. The advancements in terms of manufacturing and production. Such societies were prevalent during the Industrial revolution. It also brought urbanization and increase in the labor workers.
Which activity is most likely a result of a sudden change in the environment
phân tích đặc điểm thích nghi sinh lý của sinh vật đất
Answer:
Các vi khuẩn Psychrotolerant rất quan trọng đối với các ứng dụng công nghệ sinh học và chu trình cacbon. Tuy nhiên, các cơ chế cho phép chúng tồn tại và hoạt động trong môi trường đông lạnh vẫn chưa rõ ràng. Để làm sáng tỏ sự thích nghi của màng tế bào vi sinh vật với sự đóng băng, chúng tôi ủ đất với glucose được đánh dấu 13C theo vị trí cụ thể ở + 5 (đối chứng), - 5 và - 20 ° C và định lượng 13C trong CO2 và axit béo phospholipid. Quá trình oxy hóa cao của glucose C-1 ở + 5 ° C cho thấy sự biến đổi thông qua con đường pentose phosphate. Tuy nhiên, ở nhiệt độ subzero, sự oxy hóa ưu tiên của vị trí C-4 gợi ý chuyển sang quá trình đường phân. Sự gia tăng gấp ba lần axit béo photpholipid Gram âm trong đất ủ ở - 5 ° C đi kèm với sự gia tăng gấp hai lần sự kết hợp ở 13C. Sự gia tăng không đều này của các axit béo phospholipid và kết hợp 13C có thể được giải thích là do sự khử bão hòa đồng thời của các chuỗi axit béo hiện có và sự tổng hợp de novo của các axit béo không bão hòa đơn, cho thấy sự phát triển của vi sinh vật. Ngược lại, vi khuẩn Gram dương kết hợp các axit béo phospholipid ở nhiệt độ - 20 ° C cao hơn 2 lần so với ở - 5 và + 5 ° C mà không làm tăng đáng kể hàm lượng axit béo của chúng. Điều này phản ánh việc sửa chữa chuyên sâu các màng bị hư hỏng ở - 20 ° C mà không có sự phát triển của vi sinh vật. Tỷ lệ nấm / vi khuẩn thấp hơn 1,5 lần ở nhiệt độ subzero so với + 5 ° C, phản ánh sự thay đổi cấu trúc cộng đồng vi sinh vật theo hướng vi khuẩn. Theo đó, vi sinh vật đất thích nghi với sự đóng băng bằng cách (1) chuyển con đường trao đổi chất của chúng từ con đường pentose phosphate sang đường phân, (2) điều chỉnh axit béo phospholipid bằng cách khử bão hòa và, (3) chuyển cấu trúc cộng đồng vi sinh vật sang vi khuẩn Gram âm bằng cách khử nấm dân số.
Explanation:
Không phải lời của tôi! Tôi hi vọng cái này giúp được!
A group of organ systems makes up a
Answer:
Organs are grouped into organ systems, in which they work together to carry out a particular function for the organism. For example, the heart and the blood vessels make up the cardiovascular system.
Explanation:
If the contents of a cell have a solute concentration of 0.04 percent which of these solutions would cause it to swell?
Answer:
The contents of a cell if has the solute concentration as 0.04 percent then it should have much lesser concentration that the cell, then only it will allow the cell to swell. Because of the solutions with a lower osmotic pressure than a cell fluid solution concentration, can make it swell.
Explanation:
Science is concerned with explaining natural phenomena, based on observation, experiments, and evidence. Other questions are best answered by using other forms of knowledge and understanding, such as art, philosophy, or religion. Read each topic and select the topics for Science.
Select ALL that apply.
behavior of alligators
meaning of existence
black holes
deep-sea vents
the Aurora Borealis (Northern Lights)
ghosts, goblins, and other creatures in stories
Answer:
These:
Explanation:
behavior of alligators
black holes
deep sea vents
the Aurora Borealis
Any event or an occurrence that happens on its own without any human intervention is termed as a natural phenomena.
Natural phenomena harms the nature as well as life on earth.
Common examples of natural phenomena include thunder storms, earthquakes, landslides, volcanic eruptions, hurricane etc.
Some majestic natural phenomena include blood rain, Northern lights and luminous water in the world.
Natural phenomena can sometimes be destructive in nature and are therefore responsible for loss of lives and property.
It is almost impossible to predict the occurrence of any natural phenomena.
However, the negative outcome of natural phenomena can be managed with special disaster management operation
Thus, natural phenomena could only be observed and understood in science.
Learn more about natural phenomena, here:
https://brainly.com/question/28585198
#SPJ2
what are plastids?name their types.
Answer:
A double membrane bound organelle involved in the synthesis and storage of food, and is commonly found within the cells of photosynthetic organisms, like plants. Supplement. One of the distinctive features of a plant cell is the presence of plastids.Types of Plastids
Chloroplasts.
Chromoplasts.
Gerontoplasts.
Leucoplasts.
what are plant roots?
Answer:
vascular plants, the roots are the organs of a plant that are modified to provide anchorage for the plant and take in water and nutrients into the plant body, which allows plants to grow taller and faster.
Only a few thousand years
passed between the
appearance of life on Earth
and the appearance of
dinosaurs
True or false?
Answer:
hlw its jess bragoli
your answer is here
• false
Explanation:
The dinosaurs died out 65 million ago
and 65 million is a lot. Not a few
so your ans will be
false
Which nutrient cycle has NO atmospheric (gas) form
A) Carbon
B) Nitrogen
C) Phosphorus
D) Water
Answer:
c.) phosphorus
Explanation:
it can be found in the atmosphere as very little dust particles
width and size of a cheek cell
Answer:
it is 0.06milimeters or 60 micrometres
Explanation:
a human cheek cell is about 60 micrometres in diameter.if it was 100000 times bigger, it would have
the length of an average classroom (6m).
Which of the following is not a main characteristic of a mineral?
A. Man-made
B. Solid
C. Predictable chemical composition
D. Inorganic
Explain the role of enzymes to living organisms
Explanation:
enzymes create chemical reaction in the body.But they actually speed up the rate of chemical reaction to help support life.. Enzymes is important to our body as it supports in building muscles and destroying toxins..
a. Why was it important in this case to identify Salmonella Typhi in the feces of the restaurant worker?
Answer:
Some other types of Salmonella cause typhoid fever or ... Most people with Salmonella infection have diarrhea, fever, and ..
Explanation:
Add as brainlist
One of your classmates submits the post below which is a very informative post about criteria for safe food production during the manufacturing process. What is missing from this post? "I recently read that industrial food processing factories are required to undergo periodic inspections by the United States Department of Agriculture as well as by the Food and Drug Administration. For the USDA, these inspections are conducted by staff in the Food Safety and Inspection Service, or FSIS."A. Did not refer to the source of the information in the body of the postB. Did not state what s/he specifically learned from the sourceC. Did not provide a citation for the source of the information
Answer:
A. Did not refer to the source of the information in the body of the post
Explanation:
In the post written by his friend, we can see that he decided to write information about the periodic inspections carried out by the United States Department of Agriculture as well as by the Food and Drug Administration, because he read about these inspections somewhere. However, he forgot to show this place where he read this information, that is, he forgot to present the source where he got the information presented in the post. By presenting the source, it would make the post more trustworthy and relevant.
Earth's seasons are caused by its
O A. precession
O B. rotation
O C. revolution
O D. ecliptic
Answer:
seasons are caused by revolutions. hope this helps
which organism in the food web might be found in the first tropic level of a food chain
cougar
mouse
acorns
coyote
Answer:
Acorns would be found at the first trophic level of a food chain.
Explanation:
Can you add nutrition please?
Answer:
yes we can add nutrition from healthy and nutritious foods .
hope it is helpful to you
Critical thinking is the ability to reason and solve problems using facts and concepts. These questions can be approached from a number of angles, and in most cases, they do not have a single correct answer.
Give the common name of a eukaryotic microbe that is unicellular, walled, nonphotosynthetic, nonmotile, and bud-forming.
Answer:
Yeast
Explanation:
The correct answer would be yeast.
Yeast belongs to the fungi kingdom. Organisms in the fungi kingdom are generally eukaryotic in that their cells contain a nucleus and membrane-bound organelles such as mitochondrion. Fungal cells lack chlorophyll and are therefore nonphotosynthetic. They are also nonmotile
While fungi exhibit different body forms in terms of body complexity, the only unicellular form is yeast. The organism possesses all the attributes of fungi highlighted above, has a cell wall made largely of chitin, and reproduces through budding.
Answer: Yeast.
Explanation:
Yeasts are eukaryotic organisms, more precisely microscopic fungi that do not form filamentous networks (hyphae), classified as ascomycetes or basidiomycetes and are predominantly unicellular in their life cycle. The cell wall of yeasts is composed of complex "B"-glucan polysaccharides, mannoproteins and chitin. Also, yeast are non-motile organisms when they grownon a solid media.
They usually reproduce asexually by budding or bipartition and by having sexual stages that are not attached to a sporocarp (fruiting body). During asexual reproduction, a new bud emerges from the mother yeast when suitable conditions are met, after which the bud separates from the mother upon reaching adult size. In the case that they reproduce sexually, this occurs by means of ascospores or basidiospores. In conditions of nutrient scarcity, yeasts that are able to reproduce sexually will form ascospores.
Yeasts are important because of their ability to carry out the decomposition by fermentation (predominantly alcoholic) of various organic compounds, mainly sugars or carbohydrates, producing different substances. Therefore, they do not photosynthesize to obtain energy, since they do not possess chlorophyll (pigment responsible for capturing solar energy for photosynthesis).
At her initial evaluation, Ms. Jones reports that she has lost 25 pounds over the past eight months despite an increase in her appetite. She complains of extreme fatigue, heart palpitations and irritability. Clinical observations reveal a protrusion of the eyeballs and hand tremors. You suspect that she might have:
a. hypothyroidism
b. diabetes mellitus
c. hypopituitarism
d. hyperthyroidism
Answer:
d. hyperthyroidism
Explanation:
Hyperthyroidism is a condition that occurs when the thyroid gland in our body secretes too much of the thyroxin hormone. Thyroid gland is a butterfly shaped gland that is located in our neck and it produces the hormone called thyroxin. Excess production of thyroxin leads to a condition named hyperthyroidism.
A person's metabolism increases when he or she is suffering from hyperthyroidism. One's weight is lost but the appetite increases. Other symptoms are extreme fatigue, irritability, heart palpitations, sweating and puffy eyes.
Thus in the context, Ms. Jones is suspect to have hyperthyroidism as she she is showing all the above symptoms.
Two different enzymes catalyze the same reaction and both exhibit the same Vmax. When Enzyme A was run with a 40 uM substrate, the initial rate (Vo) was 10 uM/min, and when g it was run with a 4 mM substrate, the Vo was 20 uM/min. Estimate the approximate Vmax and Km of Enzyme A. When Enzyme B was run with 80 uM substrate, the initial rate (Vo) was 10 uM per minute. Estimate the Km of Enzyme B.
Answer:
a) k_m = 4.08 uM
V_{max} = 20.07 uM/min
b) k_m = 8.16 uM
Explanation:
Given that:
For Enzyme A:
the substrate concentration [S] = 40 uM
the initial velocity rate v = 10 uM/min
when it was 4mM, v = 20 uM/min
i.e.
at 4mM = 4000 uM;
Using Michealis -menten equation;
when v = 10
[tex]V = \dfrac{V_{max}[S]}{k_m+[S]}[/tex]
∴
[tex]10 = \dfrac{V_{max}\times 40}{k_m + 40}[/tex]
[tex]10 (k_m + 40) = V_{max}40[/tex]
[tex]40V_{max} -10k_m = 400 --- (1)[/tex]
when v= 20
[tex]20= \dfrac{V_{max}\times 4000}{k_m + 4000}[/tex]
[tex]20 (k_m + 4000) = V_{max}4000[/tex]
[tex]4000V_{max} -20k_m = 8000 --- (2)[/tex]
equating equation (1) and (2):
[tex]40V_{max} -10k_m = 400 --- (1)[/tex]
[tex]4000V_{max} -20k_m = 8000 --- (2)[/tex]
let multiply equation (1) by 100 and equation (2) by 1
4000V_{max} - 1000K_m = 4000
4000V_{max} - 20 k_m = 8000
0 -980k_m = 4000
k_m = 4000/-980
k_m = 4.08 uM
replacing the value of k_m into equation (1)
40{V_max } - 10(4.08) = 400
40{V_max } - 40.8 = 400
40{V_max } = 400 + 40.8
40{V_max } = 440.8
V_{max} = 440.8/40
V_{max} = 11.02 uM/min
b)
Since V_{max} of A ie equivalent to that of B; then:
V_{max} of B = 11.02 uM/min
Here;
[S] = 80 uM
V = 10 uM/min
∴
[tex]10 = \dfrac{11.02 \times 80}{k_m + 80 }[/tex]
10(k_m +80) = 881.6
10k_m = 881.6 - 800
10k_m = 81.6
k_m = 81.6/10
k_m = 8.16 uM