Answer:
A
Explanation:
The component not part of a chromosome is 'many strands of RNA'. The chromosomes are composed of DNA, specific sections of which form genes, and histone proteins for structural support. Although RNA results from genetic instructions within chromosomes, these strands of RNA are typically not part of the chromosome itself.
Explanation:The correct answer to your question is a: many strands of RNA. To explain, chromosomes are made up of densely packed DNA and proteins and carry genes that contain instructions for making proteins. This process takes place in the cell nucleus. The DNA in the chromosomes is first transcribed into RNA and then RNA is translated into proteins. However, these strand of RNA are generally not part of the chromosome itself but result from the genetic instructions coming from the genes residing in the chromosomes.
The options b: many proteins, c: a strand of DNA and d: a gene are indeed components of a chromosome. The DNA forms the basis of the chromosome and genes are specific sections of this DNA that code for specific proteins. The proteins mentioned here primarily refer to histone proteins around which the DNA is wrapped, providing structural support to the chromosome.
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Ignore the bottom question (how to know If gene therapy is successful)
Gene therapy is successful if the replacement gene is transcribed in the person's cells
Sickle-cell anemia is caused by a mutation in the gene encoding hemoglobin, causing red blood cells to appear
A. half-moon shaped.
B. like discs.
C. spherical.
D. long and stringy.
I believe the answer is C
Answer:
The correct answer would be option A. half moon shaped.
Explanation:
Sickle-cell anemia is a genetic disorder in which normal blood cells become rigid or stick and look like a crescent moon or half moon shape. In sickle-cell anemia condition, there are not sufficient healthy red blood cells or RBCs to carry enough oxygen throughout the body.
In sickle-cell anemia, the mutation causes a single change in the amino acid of hemoglobin, the building block of oxygen-transport protein. The alpha and beta subunits are the two subunits of hemoglobin. In sickle cell anemia, the beta subunit has valine at position 6 instead of glutamic acid that is present in normal hemoglobin.
Thus, the correct answer is option A. half moon shaped.
Which would not be considered a human activity contributing to be loss of biodiversity on earth
Human activities such as habitat destruction, introduction of invasive species, and over-harvesting are contributing factors to biodiversity loss. Ecosystem collapse as a result of these activities can significantly affect human welfare. Conversely, non-disruptive observation and conservation efforts are not considered to contribute to biodiversity loss.
Activities that contribute to the loss of biodiversity are numerous and include human endeavors such as habitat destruction, for instance, due to agriculture, urban expansion, and deforestation for logging or mining. Other contributing factors are the introduction of invasive species and over-harvesting of wild species.
Ecosystems such as tropical rainforests, which possess a high level of biodiversity, are being destroyed at an alarming rate for timber and agricultural land. Practices like these not only lead to the loss of individual species but can ultimately have dire consequences for human welfare due to ecosystem collapse.
A human activity that would not be considered contributing to biodiversity loss could be passive activities like observing wildlife without disturbing natural habitats, research, and conservation efforts.
This is the normal nucleotide sequence on a DNA strand:
A-C-T-G-G-A-T
What is an insertion?
A. A-C-T-G-C-G-A-T
B. A-C-T-G-A-T
C. A-G-T-G-G-A-T
D. A-C-T-G-G-A-U
Answer:
A. A-C-T-G-C-G-A-T
Explanation:
An insertion is when a DNA base is added into a DNA strand usually from mutations.
Invasive species often unbalanced the ecosystem into which they are introduced because
Answer:
Invasive species are those species that are non native to a given ecosystem of concern and also whose introduction causes or is likely to cause economic or environment harm or harm to the organisms in the ecosystem. They are considered as the second most threat to biodiversity, after habitat loss.
SOURCE FROM: BRAINLY ITSELFFF
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What happens during meiosis 1?
(A)Chromosome pairs separate and are distributed into new sex cells.
(B)Chromosome pairs remain together when new sex cells are formed.
(C)Two sex cells combine to form a single new cell.
(D)Each sex cell copies itself to form four new chromosomes.
The Answer D sound logical however I’m not sure about the 4 new chromosomes
During meiosis I, homologous chromosomes pair up, recombine through crossing over, and separate into two daughter cells, reducing the chromosome number from diploid to haploid.
During meiosis I, the main event is the separation of homologous chromosomes into two different daughter cells. Initially, homologous chromosomes pair up during prophase I, allowing for crossing over and genetic recombination, which introduces genetic variation. Each chromosome, consisting of two identical sister chromatids, then lines up with its homologous partner in the middle of the cell during metaphase I.
Following this alignment, the homologous pairs are pulled apart by the spindle fibers, and each moves towards opposite poles of the cell. This step ensures that each of the resulting two daughter cells contains just one chromosome from each pair, thereby reducing the chromosomal number by half, from diploid to haploid. Thus during meiosis I, chromosome pairs separate and are distributed into new sex cells, rendering answer choice (A) correct.
Identify the objective lens of the compound light microscope.
Answer:
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Answer:
The answer is actually C
Explanation:
Just took the test
Which of the following is a major disruptor of the carbon cycle?
A.
use of chemical fertilizers
B.
volcanic eruptions
C.
acid rain
D.
burning of fossil fuels
Burning of fossil fuels is a major disruptor of the carbon cycle.
How does burning of fossil fuels affects carbon cycle?Carbon that has been held underground for millions of years in coal, oil, and natural gas deposits is being released into the atmosphere at a rapid rate, causing a huge imbalance in the cycle.Carbon dioxide levels in the atmosphere and nitrogen levels in the biosphere have both risen dramatically as a result of human activity.Biodiversity, food security, human health, and water quality are all more vulnerable to climate change as a result of altered biogeochemical cycles.learn more about carbon cycle here:
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What condition is required for ATP synthase to move hydrogen down its gradient?
A. More hydrogen ions inside the membrane than outside it
B. More hydrogen ions outside the membrane than inside it
C. A day with 75 percent direct sunlight
D. More ATP molecules ahead of the hydrogen than below it
Answer:
A. More hydrogen ions inside the membrane than outside it
Explanation:
During electron transfer from water molecule to PS II and then through electron transport chain to the PS I pumps the hydrogen ions inside the thylakoid lumen. ATP synthesis is driven by energy of proton concentration gradient that moves the hydrogen ions (protons) from lumen of thylakoid membrane towards the stroma. Hence, ATP synthesis requires presence of more hydrogen ions inside the membrane.
What part of the water cycle is occurring at point A
Where is point A?and add a photo or make a new question with the photo
Which sexual transmission disease produces painful blisters in the jungle
Answer:
This sore is known as a chancre. Because this sore commonly occurs on the vulva, vagina, anus, or penis, syphilis most often is spread through sexual contact. The genital sores caused by syphilis also make it easier to become infected with and transmit HIV.
Explanation:
Genital Herpes and Chancroid are STIs that cause painful blisters or sores on the genitals, with Genital Herpes caused by a herpes virus and Chancroid by Haemophilus ducreyi.
Sexually Transmitted Infections (STIs) can present with various symptoms, including the occurrence of painful blisters. One such STI is Genital Herpes, which is caused by the herpes virus. Individuals with genital herpes experience painful blisters on the genitals that can reappear throughout one's lifetime. These outbreaks can be triggered by factors like stress and illness, and the likelihood of transmission is higher during these times. Another STI that results in genital sores is Chancroid, caused by Haemophilus ducreyi. It is characterized by soft, painful, open sores that may bleed or produce a highly contagious fluid
the evolution of lungs and gills, which developed to serve a similar gas-exchange purpose in distantly related organisms, is an example of what type of evolution?
A. convergent evolution
B. natural selection
C. emergent evolution
D. divergent evolution
Answer:
A. Convergent evolution
Explanation:
If analogous or structurally different oragns performing similar function.. We call that convergent evolution.
Answer:
The correct answer is option A, that is, convergent evolution.
Explanation:
The convergent evolution in evolutionary biology refers to the phenomenon in which the organisms that are not closely associated, that is, not monophyletic, autonomously evolve identical characteristics as a consequence of having to amend to ecological niches or identical surroundings.
For example, the evolution of lungs and gills that serves similar functions in distant organisms is an illustration of convergent evolution.
A dense group of bacteria that are difficult to treat with antibiotics is called
Answer: staphylococci bacteria.
Explanation:
Answer:
The correct answer will be biofilm.
Explanation:
Biofilm is an aggregate of micro-organisms formed of one or more types which can grow on different surfaces such as dental plaque formed on the surface of teeth. The biofilm mass is mostly composed of proteins, extracellular polysaccharides (EPS), and DNA.
Bacterial formed biofilms show resistant to antibiotics like biofilm formed by Staphylococcus aureus which causes wound infections. Poly-microbial biofilms are usually more resistant to antibiotics compared to single-species biofilms. EPS present in the biofilm attaches antibiotics.
Thus, biofilm is the correct answer.
Which term refers to the loss of fertile soil from drying out
Answer:
A desertification refers to the term which means desertlike conditions in a region. This region exhibit lack of water. Loss of fertile soil from drying out is desertification. The soil being exposed to warm weather conditions looses it's water content and becomes compact and hard.
Explanation:
Answer:
the answer is B desertification
Explanation:
just got it right on edge 2020
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How does water effect metamorphic process
Answer: The role of water in metamorphism is determined by the independent variables rock pressure, temperature, water pressure, and the amount of water present.
Explanation:
Answer:
1) Water pressures lower than the rock pressure cause metamorphic reactions to run at lower temperatures.
2) Water facilitates the transfer of ions between minerals and within minerals, and therefore increases the rates at which metamorphic reactions take place. So, while the water doesn’t necessarily change the outcome of a metamorphic process, it speeds the process up so metamorphism might take place over a shorter time period, or metamorphic processes that might not otherwise have had time to be completed are completed.
3) Water, especially hot water, can have elevated concentrations of dissolved substances, and therefore it is an important medium for moving certain elements around within the crust. So not only does water facilitate metamorphic reactions on a grain-to-grain basis, it also allows for the transportation of ions from one place to another. This is very important in hydrothermal processes, which are discussed toward the end of this chapter, and in the formation of mineral deposits.
Explanation:
what does the golgi apparatus do?
Why might a farmer choose to install wind turbines rather than solar panels?
A. Wind turbines allow agricultural use of the land.
B. Wind turbines make less noise than solar cells.
C. Wind turbines harm fewer animals than solar cells.
D. Wind turbines are more reliable than solar cells.
Since wind turbines take less space than solar panels and may be installed in fields with crops and cattle, a farmer may decide to install wind turbines rather than solar panels. So, the correct option is A.
What are Wind turbines?Tall, tower-like devices called wind turbines are used to transform the kinetic energy of the wind into electrical energy. They typically consist of a nacelle (or housing), a tower, and a rotor (or blades).
A wind turbine is built with blades that are intended to harness wind energy and turn the rotor. The generator in the nacelle is connected to the shaft that the rotor is attached to. The generator is turned as the rotor revolves, transforming kinetic energy into electrical energy. The rotor and nacelle are supported by the tower, which also raises the blades high into the air to catch the wind.
Since wind turbines take less space than solar panels and may be installed in fields with crops and cattle, a farmer may decide to install wind turbines rather than solar panels.
Therefore, the correct option is A.
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Which is a frameshift mutation
Answer: if I’m correct it’s deletion
Explanation:
Which process led to the release of large amounts of carbon dioxide at the end of the Devonian period?
A. The breakup of Pangaea
B. The extinction of plant life
C. The melting of glaciers
D. The volcanic activity
It is c my friend hope this helps
Answer:
Option (D)
Explanation:
The Devonian period represents the fourth period of the Paleozoic era, ranging from about 420 million years to 360 million years back. This period represents the age of fishes because a variety of fish species were present and also during this time, the plants that colonized on the land areas started undergoing evolution giving rise to the formation of gymnosperms.
By the end of this period, about 360 million years ago, massive and rapid volcanic eruptions took place, that released an extensively large amount of carbon dioxide into the atmosphere. This eventually lead to a mass extinction event, eliminating nearly 80% of the total living species present on earth.
Thus, the correct answer is option (D).
What would happen if a major predator was removed from the food web?
Answer:
Prey population explosion
Explanation:
If a major predator is removed from the ecosystem, it will disturb the predator-prey relationship in the ecosystem that will result in the direct increase in the prey population. This phenomenon is called population explosion where there is no check and balance on the prey population.
For example, if there is a major predator in the forest ecosystem it will feed on herbivores and keep their population at a certain level. This is called predator-prey balance where predators kill prey which in-turn cause food scarcity for predators and leads to a decrease in predator population too. So if any major predator is removed from ecosystem it will disturb this intricate balance.
Hope it helps!
Answer:
The population of prey would increase/
Explanation:
Hope this helps. :>
In general, due to the laws of physics, as magnification INCREASES in a microscope, the field of view A) blurs B) decreases C) doubles D) increases
Answer:
The answer is B) Decreases.
Explanation:
Let me know if I'm right.
Which neurotransmitter would you expect to see in high quantities, if you could, in the brain of someone who has just been rewarded with a large raise in salary for all his or her hard work?
Answer:
Dopamine is the correct answer. Dopamine would be the neurotransmitter expected to be seen in high quantities in the brain of someone who has be rewarded.
Explanation:
Dopamine can be described as an important chemical that serves both as a hormone and as a neurotransmitter in the body.
One of the dopamine pathways in the brain is involved in sending signals for the reward system. This system is responsible for the generation of signals for reward or craving for rewards, positive attitude, pleasure etc. Hence, the neurotransmitter, dopamine would be present in enhanced quantities in the brain of a person who has been rewarded with pay raise.
Answer:
Dopamine
Explanation:
Dopamine can be described as an important chemical that serves both as a hormone and as a neurotransmitter in the body.
One of the dopamine pathways in the brain is involved in sending signals for the reward system. This system is responsible for the generation of signals for reward or craving for rewards, positive attitude, pleasure etc.
In the biosphere, cycles can be very complex and interdependent. No cycle happens in isolation.
Answer: Thrue
Explanation:
which of the following best describes earthquakes along transform plate boundaries? a. common and large. b. common but small-scale. c. rare but large. d. rare and small-scale.
Answer:c
Explanation:
what is not true about the Archean eon?
A. oldest fossil is found from this time period
B. formation of earliest solid rock
C. oxygen begins to appear in the atmosphere
D. Spanned from about 3.8 billion to about 2.5 billion years ago
Answer:
D. Spanned from about 3.8 billion to about 2.5 billion year ago
Explanation:
The Archean eon expanded from 4 billion years ago, until 2.5 billion years ago, being predeceased by the Hadean eon, and being followed by the Proterozoic eon. During this eon there were numerous very important things that happened. The first solid rocks were formed, thus the basis for the first continents arrived on the scene. The oldest fossils of living organisms are also dated to this eon, and they were the ones that started to slowly change the atmosphere by introducing free oxygen molecules to it.
Small organisms, such as lichens, help break up bare rock into soil. A lichen is an example of a:
Succession
Primary Succession
Secondary Succession
Soil
Climax Community
Pioneer Species
Answer:
primary succession
Explanation:
Lichens are example of Primary succession and Pioneer species.
Answer: Option B & F
Explanation:
The lichens are nothing but combination of two microorganisms called fungi and algae. They survive together based on mutual benefit. Lichens are regularly the main creatures to colonize inhabitant rock.
They are in this manner the pioneer species in primary progression. Numerous life forms require soil before they can colonize a region. Lichens that colonize uncovered rock emit acids that separate the stone and start the dirt creation process.
Additionally, as lichens bite the dust, they give some natural issue that likewise adds to soil. Following this certain other events required for mature forest formation occurs.
The two ends of a strand of DNA are called the
A. starting end and the ending end, based on the orientation of the DNA within the chromosome.
B. 5′ and the 3′ end, based on modifications in the deoxyribose sugar.
C. sense end and the antisense end, based on the location of the phosphate groups.
D. codon and the anticodon, based on the order of the deoxyribose sugars and the phosphate groups.
Answer:
The correct answer will be option B (5′ and the 3′ end, based on modifications in the deoxyribose sugar).
Explanation:
DNA is a large molecule which acts as genetic material of the organisms. DNA exists in intertwined double helical form consisting of two DNA chains or strands.
Each DNA strand is a long, continuous thread like structure made up of repeating units called nucleotides. Each nucleotide comprises of three subunits: five carbon sugar called deoxyribose, phosphate group and nitrogen-containing bases.
Each nucleotide is connected to next nucleotide by the formation of phopho-diester bond between free 5’ phosphate (PO³⁻₄ ) group of one nucleotide and the 3’-OH group of another deoxy-ribose sugar. This gives a phosphate-sugar-phosphate-sugar chain which forms the backbone of DNA molecule and is read in 5’ -> 3’ direction.
Thus, option B is the correct answer.
Explain how biodiversity is affected by natural selection
Answer:
Biodiversity is the variety of different species of organisms on Earth, or within an ecosystem. High biodiversity is important. It make sure that ecosystems are stable becuase different species depend on each other for things like shelter and fodd. Different species can also help to maintain the right physical environment for each other (e.g. the acidity of the soil.)
Explanation:
How is NADPH different from NADP+? A. It has lost one electron B. It has gained one electron C. It has gained one proton D. It has lost one proton
Answer: The correct answer is -
A. It has lost one electron.
Explanation:
NADPH acts as a reducing agent as it can donate electron to get converted to NADP+.
This means that NADP+ due to extra proton in its chemical structure, is an oxidised form of NADPH.
NADP+ is a significant molecule that is used in the movement of high energy electrons in several processes like photosynthesis.
Thus, when NADPH loses one electron, it produces NADP+.
NADPH differs from NADP+ in that it has gained one proton, transforming from its oxidized form (NADP+) to its reduced form (NADPH) through the addition of two electrons and one proton. Hence, the correct option is C.
NADPH differs from NADP+ in that it has gained one proton. This is because the reduction of NADP+ to NADPH involves the addition of two electrons and one proton. This process transforms NADP+, the oxidized form of the molecule, into NADPH, its reduced form. Essentially, NADPH holds more energy than NADP+ due to the gain of electrons and a proton, making it a crucial molecule in the photosynthetic process, where it acts as a carrier of electrons and protons.
I need a sentence with the word chloroplast in it.
Answer:
Plant cells carry chloroplasts: organelles containing the pigment chlorophyll, which they employ to entrap sunlight
Hope this helps!
Chloroplasts have chlorophyll in them, this is a green pigment which helps to trap sunlight which enables photosynthesis for a plant.