The bigger,stronger and more aggressive animal wins the better territory and keeps it safe against others.
Of the 500 eggs produced by a certain female frog only 10 percent developed in adult frogs. Which part of Darwin’s theory does the best illustration?
Answer:
Mutations occur by chance
How does the cell make RNA?
Whats the difference between genotype and phenotype.
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The genotype is a set of genes in the DNA which are responsible for the unique trait or characteristics. Whereas the phenotype is the physical appearance or characteristic of the organism. Thus, we can find the human genetic code with the help of their genotype.Organisms may look the same but still may not have the same genotype. One can determine the genotype by the biological tests. On the other hand, the phenotype is determined by an individual’s genotype and can be expressed as genes or by the visible traits. Such traits are hair color or type, eye color body shape, and height, and many such more. It will depend on the genotype but also influenced by the factors existing in the surrounding.What are two major external characteristics that distinguish mammals from other animals.
Explanation:
Two characteristics are used to define the mammal class. They are mammary glands and body hair (or fur). Female mammals have mammary glands.
The number of a specific organism living in an area is called a
biodiversity
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Blood Vessels Blood flows through the circulatory system in blood vessels:Arteries are large vessels that carry blood away from the heart to the tissues of the body. Except for the pulmoNry arteries, all arteries carry oxygen-rich blood.Capillaries are the smallest vessels. Their thin walls allow oxygen and nutrients to pass from blood into tissues and wastes to move from tissues into blood.Veins return blood to the heart. Many have valves that prevent backflow. The contractions of the heart produce a wave of fluid pressure in the arteries, known as blood pressure. Without that pressure, blood would stop flowing through the body. The body regulates blood pressure through actions of the brain and the kidneys.
6. As blood flows through the body, it passes through three types of blood vessels. Complete the table by Nming each type and describing its structure and function.
Blood vessels
Structure
Function
Answer:
Arteries = Transports blood away from the heart. They carry oxygenated blood away from the heart and to the body with the exception of the pulmonary artery that takes deoxygenated blood from the heart to the lungs to be oxygenated. They have large muscular walls to withstand the pressure of the heart beats and since there is such large pressure, they have smaller lumen compared to the veins as the pressure drives the blood forward.
Veins = Transports blood to the heart. They tend to carry deoxygenated blood to the heart except for the pulmonary vein. Large lumen and small muscular walls with valves. The large lumen is so that more blood can flow through the veins as there's less pressure which is also why there are smaller muscular walls. There are also valves in the veins to prevent the backflow of blood.
Capillaries = Allows gas exchange and waste diffusion into blood. It is also one cell thick to allow diffusion to happen efficiently and the small structure increases the surface area to volume ratio.
Please Help 100 Points! A DNA molecule is found to contain 40% of the nitrogenous base thymine(T). What percent of Nitrtogenous base adenine(A) does this molecule contain?
A. 20% C. 60%
B.40% D.80%
What is the formula for alcohol fermentation? (Hint- ethyl alcohol formula is C2H66O)
Answer:CH3COCOO− + H+ → CH3CHO + CO
Explanation:
What are the four main types of tissue in animals?.
Answer:
Nervous Tissue
Muscular Tissue
Connective Tissue
Epithelial Tissues
Explanation:
if a person changes lotion every week can he or she get cancer
Answer: Maybe
Explanation:
It depends on the lotions used. Many lotions can have cancer-causing ingredients. If you are using mainstream lotions then there is a decent chance you will use one that can cause cancer.
What part of the blood carries the oxygen?
a. the heme group of hemoglobin
b. the platelets
c. the nucleus of the red blood cell
d. the white blood cells
Explanation:
. the nucleus of the red blood cell is the write answer
True of false The main function of the ozone layer is to shield the earth from the harmful ultraviolet rays of the sun
Answer:
true
Explanation:
the ozone layer covers the entire planet and protects life on earth by absorbing harmful ultraviolet-B (UV-B) radiation from the sun
From a classification standpoint, which of these organisms shares the LEAST similarities with humans?
A. Prosimians
B. Birds
C. Fish
D. Insects
Answer:
a
Explanation:
Explanation:
Not prosimians , correct result plis
Competition between species occurs over many resources including mates habitats dominance and food. students claim that competition can drive evolution in population
Competition is the interaction of individuals that for a common resource that is in limited supply, but more generally can be defined as the direct or indirect interaction of organisms that leads to a change in fitness when the organisms share the same resource.
There are two major forms of competition. Two of them are interference competition and exploitation competition are categorized as real competition. Interference competition occurs directly between individuals, while exploitation competition and apparent competition occur indirectly between individuals.
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Runoff has increased in recent years because of human activities. Which activity has
caused the greatest increase in polluted runoff?
A. Higher water usage
C. City urbanization
B. Illegal dumping
D. Irrigation
Answer: B llegal dumping
Explanation:
In a eukaryotic cell undergoing mitosis, how many chromosomes will be found in each of the two new cells formed
Answer:
23 Chromosomes
Explanation:
nuclear division begins, and the parent cell is divided in half, forming 2 daughter cells. Each daughter cell will have half of the original 46 chromosomes, or 23 chromosomes.
Cancer is the uninhibited growth of cells. Which of the following would be most likely to
cancer?
Carcinomas that begin in different epithelial cell types have specific names: Adenocarcinoma is a cancer that forms in epithelial cells that produce fluids or mucus. Tissues with this type of epithelial cell are sometimes called glandular tissues. Most cancers of the breast, colon, and prostate are adenocarcinomas.
24
Everyone has different
so there's no point in comparing yourself to others.
OA hair and skin color
OB. strengths and abilities
OC interests
D. ethnicities
Answer:
Option B. makes the most sense to me.
Why are alternatives to fossil fuels needed?
I need the answer ASAP
Answer:
Lower emissions, lower fuel prices and the reduction of pollution are all advantages that the use of alternative fuels can often provide.
Explanation:
Hope this helps loves x!
Both Earth systems and life systems had to evolve to create habitats before the evolution of new life-forms could occur. Which of the following could be used as evidence to support this
statement?
A.Life system: cyanobacteria begin photosynthesis and produce oxygen. Earth system: free oxygen reacts with rocks (axidation), resulting in increased rates of weathering for soil
production. Life system: land plants evolve and take root in terrestrial soil.
B.Life system: cyanobacteria begin photosynthesis and produce oxygen. Earth system: free oxygen reacts with all available dissolved iron in the ocean. Life system: mass extinction
event of anaerobic organisms occurs from buildup of oxygen in the ocean.
C.Earth system: oxygen moves from the ocean to the atmosphere through gas exchange. Earth system: free oxygen reacts with incoming solar radiation to form ozone. Earth system:
ozone collects in the stratosphere to form the protective ozone layer.
D.Earth system: molten Earth forms into layers based on density and pull of gravity. Earth system: Earth cooled, and the water vapor in the atmosphere condensed and created the
oceans. Life system: cyanobacteria evolved.
Answer:
A
Explanation:
The cyanobacteria were already there without the oxygen, so that rules out A and a lot of prokaryotes were anaerobic, so that rules out Finally, Photosynthesis does not require oxygen. Instead, Oxygen is a waste product of it.
What is photosynthesis?
Photosynthesis is a process that occurs in the chloroplast organelle of plant cells. The typical light reaction of photosynthesis takes place inside the thylakoid membrane of the chloroplast. The chief reactants such as water and carbon dioxide participate in the reaction. The water gets oxidized in the reaction to release oxygen as a product. The carbon dioxide gets reduced.
Thus, Photosynthesis is a process that occurs in the chloroplast organelle of plant cells
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What is the probability of an offspring with the genotype Hh resulting when parents with
the genotypes HH and hh are crossed?
A. 50%
B. 100%
C. 25%
D. 0%
Answer:
100%
Explanation:
the only possibilities from HH and hh are: Hh Hh Hh Hh
How is the atmosphere a system? Explain and give one example.
Answer:
Because it is a fluid system, the atmosphere is capable of supporting a wide spectrum of motions. These range from turbulent eddies of a few meters to circulations with dimensions of the Earth itself. By rearranging mass, air motion influences otheratmospheric components such as water vapor, ozone, and cloud, which figure prominently in radiative and chemical processes. Such influence makes the atmospheric circulation a key ingredient of the global energy budget.
Explanation:
right off of go ogle
compare electron and light microscope
The electron microscope uses a beam of electrons for magnifying the real image of an object. While the light microscope uses visible light to magnify the images of miniature substances or biological specimens.
What do you mean by Microscope?A microscope may be defined as an instrument that is to be used to magnify small objects such as biological cells, minerals samples, etc.
Electron microscopes have a higher level of magnification and a threat of radiation leakage as compared to the light microscope. In the electron microscope, image formation relies on the scattering of electrons while it depends on light absorption in the light microscope.
The electron microscope offers high resolution and is thus expensive as compared to the light microscope.
Therefore, it is well described above.
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Drag each item to indicate whether it is an example of water used in the production of food or energy.
Compare the Early Earth's Atmosphere to today's Atmosphere. What change in the atmospheric conditions impacted life on earth the most?
Answer:
For early earth, it was filled with loads of oxygen and could kill humans if they breathed the oxygen that was in the air about 100 million years ago. This massive amount of oxygen cause massive creatures like the dinosaurs to exist. Current earth has an atmosphere with not too much oxygen.
Explanation:
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Which taxonomic domain would the following organism be classified with the following characteristics?
no membrane enclosed nucleus
can be classified by shape
exisits all over the world in many types of environments
Domains are classified by scientist Carl Woese on the basis of presence of nucleus in cells, their ability to make food, and the number of cells in organism bodies.
What is domain and types?Domain is defined as the highest taxonomic rank in the hierarchical biological classification system, above the kingdom level. There are three domains of life namely the Archaea, the Eucarya and the Bacteria.
Archea do not have a nucleus whereas Eubacteria have a non-enveloped nucleus and Eukarya have enveloped nucleus.
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Why can things like the sea fans and cuttlefish live in the seas off europe?
Answer:
The Common Sea Fan can be found in patches of reefs and outer areas of the reefs typically in water depths up to 30 meters, and they tend to thrive in areas where the water flow is at a constant speed. The speed of the water is important due to the fact that all sea fans are filter feeders.
Which of the following statements BEST describes a relationship between two animals in the diagram? A.The turtle and fish have gills. B. The turtle and prairie dog have gills. C.The turtle and prairie dog are cold-blooded. D. The turtle and fish are cold-blooded.
Answer:
D. The turtle and fish are cold-blooded.
Explanation:
Some cold-blooded animals include insects, worms, fish, amphibians, and reptiles.
All creatures except mammals and birds are cold-blooded.
How many cherry pies have 90 or more cherries?
Answer:
6 pies
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A pair of membranes enclosing the nucleus with pores allowing the movement of molecules in and out of the nucleus is the nuclear.
Answer:
The nuclear membrane encloses the nucleus in eukaryotes. The membrane is penetrated by nuclear pore complexes.
Explanation:
The nuclear membrane (nuclear envelope, nucleolemma) isolates the interior of the nucleus from the cytoplasm. The membrane has two layers enclosing a distinct inner lumen (em). The nuclear membrane is penetrated by large nuclear pore complexes, which selectively transport molecules into or out of the nucleus. The luminal space within the double-layered nuclear membrane is continuous at points with the endoplasmic reticulum, a membrane-enclosed organelle (continuous with the outer nuclear membrane) to which are attached ribosomes (em2) executing translation of genetic coding into polypeptides and proteins.
Type V intermediate filaments are lamin proteins that have a nuclear signal sequence and form a filamentous support called the nuclear lamina just beneath the inner nuclear membrane. The lamina a net-like meshwork array that lines the inner nuclear membrane and governs the shape of the nucleus. Of the three nuclear lamin proteins, two are alternatively spliced products encoded by a single gene, while the third lamin is encoded by a separate gene. Nuclear lamins form a fibrous network that supports the nuclear membrane.
Lamins have a very long rod domain and carry a nuclear transport signal, they are located in the nucleus just beneath the nuclear envelope so they are vital to the re-assembly of the nuclear envelope after cell division. Lamins are phosphorylated at the end of prophase and this causes them to disassemble simultaneous with dissolution of the nuclear envelope. After cell division, they are dephosphorylated just before the nuclei of the daughter cells form and lamin filaments reassemble around each set of chromosomes. They are continuous except for a break at the sites of nuclear pore complexes. Lamins were probably the first intermediate filaments to evolve. Controlled by cdc2 kinase, lamin filaments disassemble prior to or early in mitosis then reassemble after cell division. Phosphorylation of serine residues in the N-terminal domain of lamin A by cdc2 kinase induces the disassembly of intact filaments and prevents reassembly.
Nuclear lamins help attach the chromosomes to the nuclear membrane and provide anchorage points for the nuclear pores. It is believed that nuclear lamins are the evolutionary ancestor of cytoplasmic intermediate filaments, which evolved through duplication and translocation of the gene product to the cytoplasm
