Answer:
At the end of mitosis, the two daughter cells will be exact copies of the original cell. Each daughter cell will have 30 chromosomes. At the end of meiosis II, each cell (i.e., gamete) would have half the original number of chromosomes, that is, 15 chromosomes.
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Explanation:
Match the structure with the correct type. A structure type may be used more than once. 35.bat wing and mouse arm_____A. homologous structure 36.reptile foot and bird foot ____B. analogous structure 37.dolphin fin and fish tail ____C. vestigial structure 38.eves on a blind cave fish ____ 39.snake tongue and dog nose ____
Answer:
35. A. homologous structure
36. B. analogous structure
37. B. analogous structure
38. C. vestigial structure
39. B. analogous structure
Explanation:
A homologous structure is a similar structure/trait found in different species because they diverged (evolved) from a common ancestor, i.e., these species share a common ancestor that had the homologous structure/trait. A homologous structure may have the same or different functions in the descendants. Conversely, an analogous structure is a similar structure/trait that evolved independently (i.e., by convergent evolution) in different species to have the same function, thereby these species don't share a common ancestor with the trait. Finally, a vestigial structure is a rudimentary biological structure found in an organism that has lost its original/ancestral function (e.g., the appendix in humans or the hindlimbs of the snake). Vestigial structures provide strong evidence for evolution by use/disuse of body parts.
Homologous and Analogous structures differentiate in origin and function. Vestigial structures have lost their function. A) Homologous, B) analogous, C) analogous, D) vestigial, E) analogous.
What is an homologous structure?Homologous characters are the structures of different organisms that,
are composed of the same basic elements. share the same position in the body and the same relationship with adjacent structures.share the same embryological development.These structures might express some variations between the organisms that might be related to their function and to the environment. Their function is not necessarily the same in all the organisms involved.
These homologous characters are present in organisms related that share a common ancestor.
What is an analogous structure?Analogous structures are those body parts of different organisms that accomplish the same function, but they are originated from different areas. These structures do not share the same origin.
What is a vestigial structure?Vestigial structures are those body parts, genetically determined, that have been retained during the evolution of the taxonomic group but have lost or reduced their original function.
Such vestigial structures were plenty functional in the ancestors of new species, but now are typically degenerate, stunted, or rudimentary, and tend to be much more variable than homologous non-vestigial parts.
According to these definitions, we can answer the questions.
bat wing and mouse arm_homologous structure_reptile foot and bird foot _analogous structure dolphin fin and fish tail _analogous structure_eyes on a blind cave fish are _vestigial structure_ snake tongue and dog nose _analogous structure_You will learn more about homologous, analogous and vestigial structures at
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The ability of our bodies to maintain internal stability is called:
A. Balance
B. Digestion
C. Hypertonicity
D. Homeostasis
Answer:
D. Homeostasis
Explanation:
The ability of our bodies to maintain internal stability is called: Homeostasis
What creates a positive charge inside the cell during a nerve impulse?
A. Gated sodium channels open and sodium ions flood into the cell.
B. Negatively charged ions leave the cell and make the inside positive.
C. Carbon dioxide molecules break apart and become ions to create an overall positive charge.
D. Across the synapse, positively charged ions of many different elements flow into the cell.
Answer:
a gated sodium channels open and sodium ions flood into the cell
All prokaryotes are _________ eukaryotes
More complex than
Smaller than
Larger than
Similar in size to
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Which of the following is a result of limiting weed growth through mulching?
A. lowers the need for herbicides
B. increases the amount of pests
C. lowers the amount of crops that can grow
D. increases the need for water
Answer: its B or D
Explanation: ihope this helps
Explain: What triggers each step in the synthesis of tryptophan?
Hello!
What triggers each step in the synthesis of tryptophan?
Each step is triggered by a specifi c enzyme. The tryptophan operon contains fi ve genes (trpA through trpE) needed to make the amino acid tryptophan. When tryptophan levels are low, RNA polymerase binds to the operator, turning on the transcription of the fi ve enzyme genes needed for tryptophan synthesis.
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Each process is started by a unique enzyme. The five genes (trpA through trpE) of the tryptophan operon are required to produce the amino acid tryptophan.
What is a synthesis of tryptophan?The five enzyme genes required for tryptophan production are turned on by the binding of RNA polymerase to the operator when tryptophan levels are low.
Due to this, the cell either stops further synthesis or binds to a repressor, which induces the creation of the enzymes needed for its manufacture and synthesis.
When tryptophan levels are low, the trp operon is expressed (or "turned on"), and when levels are high, it is repressed (or "shut off"). The trp repressor prevents the operon from being expressed when it is linked to tryptophan.
Therefore, (trpA through trpE) of the tryptophan operon is required to produce the amino acid tryptophan.
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which process uses carbondioxide present in the air
a.burning of fossil fuels
b.production of glucose
c.asimillation in animals
d.breakdown of organic matter
Answer:
a.burning of fossil fuels
Answer:
b.production of glucose
when two heterozygous individual are crossed,the proportion of the offspring that are true breeding for dominant trait is
Answer:
75%
Explanation:
If you drew a Punnett Square, you will see that the possible outcomes would be AA, Aa, aA, and aa. Three out of the four would exhibit the dominant trait.
what is photo synthesis ?
[tex]\sf\purple{Photosynthesis}[/tex] is a process by which phototrophs convert light energy into chemical energy.
The word “photosynthesis” is derived from the Greek words "phos" (which means “[tex]\sf\pink{light}[/tex]”) and "σύνθ-εóîς" (which means “[tex]\sf\red{combining\:together}[/tex] .”) And so it means “combining together with the help of light.”
The process of photosynthesis occurs in green plants (the primary producers in a food chain) and a few other autotrophic organisms such as cyanobacteria, purple bacteria and green sulfur bacteria.
Following is the photosynthesis formula:
6 CO2 + 6 H2O —> C6 H12 O6 ([tex]\sf\blue{glucose}[/tex]) + 6 O2 ([tex]\sf\pink{oxygen}[/tex]).
[tex]\large\mathfrak{{\pmb{\underline{\orange{Happy\:learning }}{\orange{.}}}}}[/tex]
Answer:
the process by which green plants and some other organisms use sunlight to synthesize nutrition form carbon dioxide and water.
Often organisms seem similar in their outward appearances. For example, a porpoise and a shark seem closely related, but they are not. Such similarity is the result of .
Answer: Such similarity is the result of CONVERGENT EVOLUTION
Explanation:
Evolution can be defined as the theory that was developed based on the findings of scientists that living organisms are descended from a common ancestor.
The current theory of the process of evolution makes use of present day knowledge of genes and chromosomes to explain the source of genetic variation upon which natural selection works. It postulates that although natural selection is the only force that regularly produces adaptive evolutionary change, other forces too play a part in evolution.
Evolutionary changes may show the following patterns:
--> one species gradually transform into another species.
--> one or more species evolve as offshoots of a single ancestral species to fill a wide variety of habitat. This is known as divergent evolution.
--> Many superficially similar looking species arise from different ancestral species. This is known as CONVERGENT EVOLUTION. It is shown by organisms occupying very similar kinds of environment. That is why a porpoise and a shark seem closely related, but they are not.
If 65,000 kcal are
available in the
producers trophic
level, how much
energy is available
to the secondary
consumers?
Answer:
13000 would be avalable because 10% is taken every time it is eaten so 65,000 with 10% taken out twice (20% of 65,000) is only 13,000 kcal available to the secondary consumers.
11. The heart is made of *
O involuntary cardiac muscle
O voluntary muscle
O skeletal muscle
Answer:
involuntary muscle
Explanation:
The heart has 4 different lobes with two on each side and arteries connecting both sides. The heart is made of bones and involuntary muscle. This is the reason why the heart is able to make beats. The answer is involuntary muscle.
Provide an example of how eukaryotic cells are used in biotechnology: *
Answer:
Eukaryotic cells are plants, animals, protists, fungi. Their genetic material is organized in chromosomes. Golgi apparatus, Mitochondria, Ribosomes, Nucleus are parts of Eukaryotic Cells.
Animals such as cats and dogs have eukaryotic cells.
Plants such as apple trees have eukaryotic cells.
Fungi such as mushrooms have eukaryotic cells.
Protists such as amoeba and paramecium have eukaryotic cells.
Insects have eukaryotic cells.
Humans are composed entirely of eukaryotic cells. Related Links: Examples.
Explanation:
Bacterial strains, especially Actinomycetes have been used in biotech production and drug discovery for years. Genetic methods now open the field of combinatorial biosynthesis that has improved impressingly in the past couple of years. Also, the productivity of yeast and other fungi in a variety of different processes has improved significantly since genetic methods have been introduced. In addition, a number of recent works considerably widens the potential of plant biotechnology. This review covers examples describing the use of prokaryotic cells and plant cells in biotech production.
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Bacterial strains such as Actinomycetes have been used in biotech production and drug discovery for years.
What is Biotechnology?Biotechnology is defined as the integration of natural sciences and engineering sciences to achieve the application of organisms, cells, their parts and molecular analogs to products and services.
It is described as the technology that uses biological systems, living organisms or parts thereof to develop or create various products such as brewing and baking bread are examples of processes that fall under the concept of biotechnology where the use of yeast i.e. living organism to prepare the desired product, bacterial strains such as Actinomycetes for making drug etc.
The most important area of biotechnology is the production of therapeutic proteins and other drugs through genetic engineering.
Thus, Bacterial strains such as Actinomycetes have been used in biotech production and drug discovery for years.
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A cut parallel to the midsagittal plane would produce a ________ section. A cut parallel to the midsagittal plane would produce a ________ section. parasagittal superior frontal transverse coronal
How do wales differ from fish
Answer:
Whales are mammals that need air from the sea's surface to survive. Whales are capable of giving birth to live young. Fish have gills and use them to draw oxygen from the water. The majority of fish lay eggs. Whales and other marine animals with horizontal tail fins, such as dolphins, have vertical tail fins, while fish have vertical tail fins.
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If H X G means H is to the South of G
H + G means H is to the North of G
H ÷ G means H is to the East of G
H-G means H is to the West of G
Then, in A÷ B +C-D; D is in which direction with respect to B.
a)North
b)South
c)North-East
d)South – East
Answer:
C. North-East
Explanation:
North" (and any subsequent words) was ignored because we limit queries to 32 words.
40. Which table describes adaptations that allow organisms to survive in a desert environment?
Answer:
Explanation:it needs to be able to store water long periods of time
What would you expect to occur if you were to repeatedly lift 25 pounds over your head for 1 minute, rest for 1 minute, and then repeat the exercise?
a group of cells which have a common origin,structure and function
What causes the plates in Earth's crust to move?
0 Ocean currents
O Solar energy
Convection cells
O Sea floor spreading
Toxic gases enter earth due to
Explanation:
Carbon dioxide (CO2) is the primary greenhouse gas emitted through human activities
PLEASE HELP IM ABOUT TO FAIL THE CLASS!!
What is mainstreaming?
*SOCIOLOGY*
What is sprouting
How do we commonly make curd at home
Answer:
Sprouting is the natural process by which seeds or spores germinate and put out shoots, and already established plants produce new leaves or buds or other newly developing parts experience further growth.
Es verda que Las plantas de semilla se dividen en dos grupos de acuerdo con el lugar donde se desarrolla la semilla, en angiospermas y gimnospermas
Answer:
No.
Explicación:
No, las plantas de semilla no se dividen en dos grupos según el lugar donde se desarrolla la semilla en angiospermas y gimnospermas. Se dividen en dos grupos sobre la base de semillas desnudas y semillas cerradas. En las angiospermas, las plantas son plantas con flores que llevan sus semillas cerradas dentro de los frutos mientras que en cambio, en las gimnospermas son plantas que no producen flores y llevan conos y semillas.
↬Define a Cell in Biology.
The cell is the basic structural, functional, and biological unit of all living organisms.
The structural and essential component of life is the cell. Cell biology is the study of cells, including their fundamental makeup and the purposes of each of their organelles.
The first biologist to discover cells was Robert Hooke. Cells make up every living thing. They could consist of several cells (multicellular) or just one cell (unicellular) (multicellular).
The tiniest cells known to science are mycoplasmas. All living things are constructed from cells. They give the body structure and turn the nutrients from the diet into energy.
Complex cells conduct a variety of tasks for an organism's parts. They resemble masonry bricks in that they come in a variety of sizes and forms.
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Which 'if any' of the following are true? Aquatic animals present a greater risk to divers than any other factor. Most aquatic animal bites result from an animal's defensive response to a perceived threat or, on rare occasions, from a case of mistaken identify. Because they are perceived as more aggressive, men are more likely to be the victim of an aquatic animal attack than women are. None of the above.
Answer:
B. Most aquatic animal bites result from an animal's defensive response to a perceived threat or, on rare occasions, from a case of mistaken identify.
Explanation:
A strain of Neisseria gonorrhea has a mutation which has caused it to lose the ability to produce fimbriae and become less virulent as a consequence. What function has this pathogen lost
Answer: The pathogen has lost the function of the ability to adhere to cells of the body.
Explanation:
Neisseria gonorrhea is a gram negative bacteria that has the ability to attack and cause disease in man using its virulent factors. It is know to attack the urethra of both male and female producing an acute urethritis and tenda to spread locally if not treated. The virulent factors determines the ability of the organism to infect or damage it's hosts tissues and they include:
--> endotoxins
--> pilli
--> fimbriae
--> capsule polysaccharide expression
The fimbriae is one of the virulent determinants which the organism uses to attach to the host cells. As these bacteria multiple and grow, there are chances of mutation occuring. MUTATION is defined as the errors during DNA replication or induced by exposure to mutagens (like chemicals and radiation)
If the bacteria is affected by mutation, which can cause the gene for fimbriae production not to be expressed, the virulent factor of the organism will be highly affected as the first step to cause an Infection which is attachment is lost.
How do you think new proteins affect the fitness of children?
They have no effect on fitness
They increase fitness
They decrease fitness
All of the above
Answer:
All of the above
Explanation:
Protein is especially important to consume after a workout, as during exercise you are effectively breaking your muscles down. That is why it's common to see people at the gym eating protein bars or drinking whey shakes when they have finished their routine. It helps to increase the impact of their exercise.
Excess protein consumed is usually stored as fat, while the surplus of amino acids is excreted. This can lead to weight gain over time, especially if you consume too many calories while trying to increase your protein intake
Some high-protein diets include foods such as red meat and full-fat dairy products, which may increase your risk of heart disease. A high-protein diet may worsen kidney function in people with kidney disease because your body may have trouble eliminating all the waste products of protein metabolism.
number the steps for using a microscope to view a slide order from 1-11
can u zoom in cant see it