Answer:
evolución
Explanation:
Explain why stem cell research is a controversial subject. What are some of the sources for stem cells?
Answer:
Stem cell research is a controversial subject because they are human embryonic stem cell (hESC), and obtaining stem cells involves the destruction of human embryos
Explanation:
The inner cell mass of a 5 to 7-day-old blastocyst can be used to generate pluripotent stem cell lines. Human embryonic stem cell investigation, on the other hand, is morally and politically fraught since it encompasses the killing of human embryos.
What are stem cells?Stem cells are the primary raw material of the body, the cells that give rise to every other cells with specialized functions.
Under the right circumstances, stem cells differentiate to form the most cells known as daughter cells in the body or in a research lab.
Stem cells are mostly found in bone marrow. This is how they divide in order to produce new blood cells.
Once mature, blood cells end up leaving the bone marrow and reach the bloodstream. A small number of immature stem cells enter the bloodstream.
Bone Marrow has long been thought to be the best source of stem cells.
Previously, if a patient required a stem cell transplant but didn't have access to umbilical cord blood stem cells, they earned a bone marrow transplant.
Thus, this is the reason to have stem cell research as a controversial subject.
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An atom with 17 protons 17 neutrons and 17 electrons has a net charge of what
Answer:
0
Explanation:
Since we have the same amount of protons and electrons, our net charge is 0.
Hope this helped,
~cloud
Which of the following would be examples of abiotic factors in a mountain river ecosystem?
fish, algae, and sand
sand, water, and fish
sand, water, and minerals
water, fish, and algae
oil-rich countries in the middle east cover about 4% of earth's total land area but posses about 48% of the world's known oil reserves. what is the main reason for high concentration of reserves in this part of the world?
The correct answer is A. Geological processes.
Explanation
Oil is a hydrocarbon of fossil origin by geological processes that transforms large amounts of organic matter deposited on anoxic bottoms of seas or lake areas of the geological past, which were later covered by heavy layers of sediment. This causes organic materials to be transformed into oil by the heat and pressure of the upper layers. However, this phenomenon does not occur in all parts of the earth because in some, as in the case of the Middle East, there were large amounts of organic matter that became an oil reserve. So the correct answer is A.
which of the following is true for a eukaryote?
A. it is one of the first life forms to appear on earth.
B. it doesn't have a nucleus and organelles.
C. it must be a multicellular organism.
D it evolved from prokaryotes
Answer:
D it evolved from prokaryotes
Explanation:
let me know if you have any questions
which structure will be found in the nucleus of body cells in a woman?
a) x allele
b) x chromosomes
c) y allele
d) y chromosome
The x chromosomes are found in the nucleus of body cells in a women. Thus option b is correct.
What are chromosomes?Chromosomes are defined as a thread like structure located in the nucleus of every cell in our body and are formed of tightly coiled DNA surrounding proteins.
Chromosomes plays very important role in human body.
The primary purpose of chromosomes is to transport DNA and genetic information from parents to offspring.
It play a vital role during cell division.
They keep DNA from becoming twisted and damaged.
There are basically two types of chromosomes.
AutosomesSex chromosomesThus, the x chromosomes are found in the nucleus of body cells in a women. Thus option b is correct.
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Genetic variation is more commonly found in sexually reproducing organisms, as compared to asexually reproducing organisms, because
1 point
in asexual reproduction gametes fuse to lead to new genetic combinations
in sexual reproduction the gametes formed are all genetically identical
in asexual reproduction the gametes formed are genetically different
in sexual reproduction gametes fuse to lead to new genetic combinations
Answer:
In sexual reproduction gametes fuse to lead to new genetic combinations
Explanation:
In sexually reproducing organisms, there are two parents who create genetically diverse offspring.
This occurs because the gametes of the two parents combine to create very unique genetic combinations, which lead to increased genetic variation.
On the other hand, asexually reproducing organisms reproduce without a partner.
Their offspring are identical clones to the parent, so they have much less genetic variation.
So, the correct answer is that In sexual reproduction gametes fuse to lead to new genetic combinations.
An example of a density-independent factor that affects a population's growth is Select one: a. insects eating your tomato plants. b. your tomato plants competing for water. c. a fungus infecting your tomato plants. d. frost killing all of your tomato plants. e. All answers are correct.
Answer:
The correct answer is - D. frost killing all of your tomato plants.
Explanation:
Density independent factors are the factors that are limiting factor that are affects the size of population of the living beings without being affected by density of population. In such factors density of population does not play any role or affect the size of population.
In the given option other than frost all are density dependent factors affecting size of population.
A technique that can be used to separate proteins based primarily on the presence of non-polar residues on their surface is called A) ion-exchange chromatography. B) gel filtration chromatography. C) affinity chromatography. D) gel electrophoresis. E) hydrophobic interaction chromatography.
Answer:
E) hydrophobic interaction chromatography.
Explanation:
Hydrophobic interaction chromatography (HIC) is a methodology used to separate protein molecules depending on their hydrophobicity. HIC enables the separation and purification of proteins by using a reversible interaction between the target protein and the hydrophobic ligand of a HIC resin such as, for example, methacrylate-based beads. This interaction is influenced by the running buffer (high salt concentrations favor hydrophobic interactions). HIC enables the separation of proteins under low denaturation conditions, thereby preserving their biological functions.
Genesis that forms from high-grade region of heat and pressure example of steps in ____ cycle
1. Rock cycle
2. Carbon cycle
3. Tectonic cycle
4. Water cycle
Answer:
tectonic cycles
Explanation:
the house in question was
Which capacity makes living beings to adjust in hard environment
The biological referred to as Adaptation makes living beings to adjust in exhausting atmosphere.
Adaptation, in biology, is that the method by that species measure suitable their several atmosphere, thanks to Natural Selection’s method ensuing into patrimonial variation over many generations.
What is Adaptation?According to Evolution, Adaptation method is that the process underneath that organisms suits the present atmosphere in conjunction with the modifications thanks to change in atmosphere.
Adaptation is connected with the idea of evolution that was propounded by Darwin and Wallace.
According to Wallace, the evolution of organisms was supported 2 factors: Adaptation and dynamic atmosphere.
To develop the idea of evolution by survival, Wallace and Darwin targeted not solely on straightforward adaptation however additionally proceeded more to clarify however organisms adapt and evolve.
Biologically Adaptation will be in 3 forms:
- Psychological kind
- generative kind
- sequence Frequency
Psychological form- associate degree animal or plant adapt by adjusting consistent with its immediate atmosphere.
Example- modification in temperature or metabolism with a rise in altitude
Reproductive form- method of adaptation thanks to genetic variations among people that is customized i.e. having larger success in—a specific environmental context.
Gene frequency- the method of adaptation happens through associate degree ultimate modification within the sequence frequency relative to blessings bestowed by a selected characteristic, like the coloration of wings within the moths.
Organisms will adapt to associate degree atmosphere in several ways in which. they will adapt biologically, which means they alter body functions
Example- individuals living at high altitudes have evolved changes in their body chemistry and may survive at high altitudes for a brief time as a result of their bodies raise their levels of hemoprotein.
They can additionally exhibit activity adaptation.
Example of activity adaptation is however emperor penguins in Antarctica foregather to share their heat within the middle of winter.
What is theory of Natural Selection?The theory of survival was given by Darwin in 1859.
Natural selection is that the method through that populations of living organisms adapt and alter.
Individuals in an exceedingly population square measure naturally variable, which means that they're all completely different in some ways in which.
This variation means some people have traits higher suited to the atmosphere than others. people with adaptive traits—traits that provide them some advantage—are a lot of seemingly to survive and reproduce.
These people then pass the adaptive traits on to their offspring. Over time, these advantageous traits become a lot of common within the population.
Through this method of survival, favorable traits square measure transmitted through generations.
Natural selection will cause phylogeny, wherever one species offers rise to a replacement and clearly completely different species. it's one among the processes that drives evolution and helps to clarify the range of life on Earth.
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Which level of organization is characterized by a group of cells that work together to perform a common function?
organ
tissue
organ system
organism
Answer:
B
Explanation:
Answer:B
Explanation:
Which of these organelles is NOT in animal cells?
Ribosome
Endoplasmic Reticulum
Cell Wall
Động vật nào sau đây máu đu nuôi cơ thể không pha trộn giữa máu giàu o2 và máu giàu co2
Answer: Tôi không thể giúp anh vì anh chưa bao giờ đặt tên cho bất kỳ con vật nào
Glycolysis and gluconeogenesis are opposing pathways in that they begin or end with the same metabolites and share common intermediates and/or enzymes. Yet, for energetic reasons, the two processes cannot be the exact reverse of each other. How is this possible
Answer:
Due to difference in their products.
Explanation:
Glycolysis and gluconeogenesis are not exact reverse to each other because in glycolysis, glucose is converted into pyruvate, adenosine triphosphate (ATP), NADH, protons i.e. hydrogen ions and water whereas in gluconeogenesis, pyruvate is converted into glucose and glycogen. So due to the formation of different products of each process we can say that glycolysis is not exact reverse of gluconeogenesis.
Which of the following is a start codon?
A.UAG
B.AUG
C.UAA
D.UGA
Answer:
AUG
Explanation:
you can use a codon chart to help or double check.
B) you can use a software to check
Biological method involves all the following except
(a) data collection (b) observation (c) proportion (d) experiment
Que tipo de ecosistema tienen los pingüinos emperador y Adelia?
Answer:
Los pingüinos Adelia viven en el continente antártico y en muchas pequeñas islas costeras circundantes. Pasan el invierno en alta mar en los mares que rodean el hielo antártico.
Los pingüinos emperador viven exclusivamente en entornos antárticos gélidos. Prefieren reproducirse durante el invierno, cuando el hielo se congela y se estabiliza. Estos pingüinos suelen crear colonias de reproducción en áreas cercanas a icebergs y acantilados helados, que los protegen de los peores vientos fuertes.
Explanation:
te ayuda esto?
What type of evolutionary adaptations did plants acquire to allow them to grow in areas that were not directly on a water source?
Answer:
Plants developed roots to absorb water from the ground
Answer:
Vascular seedless plants evolved specific structures to transport and hold fluids, reducing dependence on water sources.
Explanation:
If given the ability to hold on to water, the plant does not have to frow directly on a water source.
What is the function of the Xylem in a leaf?
plzzzzzz hellppppp......
answer h and i urgently
no explanation needed
Answer:
h. I think option c growth of an organism in not true
What is the difference between sediments deposited in outwash and sediments deposited in moraines?
1. Sediments in the outwash are larger.
2. Sediments in the outwash are sorted
3. Sediments in the outwash are more angular
4. Sediments in the outwash are older.
Answer:
2. Sediments in the outwash are sorted
The difference between sediments deposited in outwash and sediments deposited in moraines is that-Sediments in the outwash are sorted. Therefore, the correct option is 2.
What is the sediment of outwash and moraines?Outwash is the sediment that is carried away from a glacier by meltwater and deposited in streams and rivers. This sediment is typically well-sorted, which means that particles are relatively uniform in size, shape, and composition.
Moraines are piles of unsorted sediment that are left behind by a glacier as it retreats. This sediment is typically a mix of different particle sizes, shapes, and compositions.
The glacier's movement is not strong enough to sort the sediment of moraines, so it remains unsorted. Therefore, the correct option is 2.
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What is the Constant of “which bait works best for a fly trap?”
Answer:
Mix scraps of meat (the older, the better) with something sweet. Lots of people swear by using rotten fish or shrimp, which probably work best because they smell so much. Bait for Fruit Flies: Use fruit (the riper, the better), apple cider vinegar, fruit juice, syrup, wine, beer, or any combination
What is an advantage of electron microscopes compared to light microscopes?
They have a much higher power of resolution.
They can be used to view live specimens.
They are inexpensive and commonly found in classrooms.
They are helpful during dissections.
Answer:
They have much higher power of resolution.as compared to light microscope.
identiying Parts of Spheres Use the drop-down menus to identify the spheres to which each part belongs.
A lake is part of the ___
Water vapor in the air is part of the___
Glacier and iceburgs are part of the___
The rocky mountains are part of the___
A deer is part of the____
Answer:
Answer is
A lake is part of the hydrosphere.
Water vapor in the air is part of the atmosphere.
Glacier and icebergs are part of the cryosphere.
The Rocky Mountains are part of the geosphere.
A deer is part of the biosphere.
what are the two characteristics of Pine due to which it is not placed under sub division angiosperms
Answer:
The angiosperms, or flowering plants, are the largest and most species-rich phylum of plants, with more than 250,000 species estimated.
Defining Characteristics
The term "angiosperm" derives from two Greek words: angeion, meaning "vessel," and sperma, meaning "seed." The angiosperms are those plants whose seeds develop within a surrounding layer of plant tissue, called the carpel, with seeds attached around the margins. This arrangement is easily seen by slicing into a tomato, for example. Collectively, carpels together with the style and stigma are termed the ovary, and these plus associated structures develop into the mature
Explanation:
A group is considered monophyletic if
A. all members of the group share a common ancestor that is included in the group.
B. all members share homoplastic traits.
C. the group does not contain the most recent common ancestor.
D. not all descendants of the common ancestor are included.
E. it is the most parsimonious grouping.
Explain how the changes in the villi of a person with coeliac disease may cause the person to lose weight and have low amounts of vitamins and minerals in their body
Answer:
The changes in the villi of a person with coeliac disease may cause the person to lose weight and have low amounts of vitamins and minerals in their body because Villi absorb vitamins, minerals and other nutrients from the food you eat.which best describes a bacterium
Answer:
Bacteria
Bacteria are a type of biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were among the first life forms to appear on Earth, and are present in most of its habitats. Wikipedia
Explanation:
a member of a large group of unicellular microorganisms which have cell walls but lack organelles and an organized nucleus, including some that can cause disease.
