Answer:
Both organelles present their genetic material. Both organelles divide by binary fissionBoth organelles present a double membrane, the internal one looks identical to the bacterial membrane, while the external membrane looks like the eukaryotic one. In the internal membrane are placed the energy centers, just as it occurs in bacterias membrane. The sizes of the organelles are similar to the size of some procaryotesExplanation:
The endosymbiotic theory essentially states that some organules of the eukaryotic cells, such as mitochondria and chloroplasts, were once free-living bacteria. Probably, these organisms must have been phagocytized but not digested by another cell. These bacteria were able to adapt to their host, establishing a bond of dependence among each other.
Both organelles have many similarities with other free-living bacteria. For this reason, the theory states that chloroplasts derivate from cyanobacteria (because they both absorb sunlight, store the energy in ATP, and produce organic molecules) and that mitochondria derivate from rickettsias (because they produce ATP in the same way, by using the Krebs Cycle and Oxidative Phosphorylation).
This theory is supported by a few characteristics of the chloroplasts and mitochondria that suggest that they once were free cells. For example,
Both organelles present their genetic material. This DNI is independent of the cells´ DNA, is bi-catenary and circular, identical to the bacterial DNA, and very different from the one of the eukaryotic cells.Both organelles divide by binary fission, not by mitosis, and can synthesize their ribosomes and organelles. Both organelles present a double membrane, a characteristic that reinforces the idea of being phagocyted. The internal membrane looks identical to the bacterial membrane, while the external membrane looks like the eukaryotic one. In fact, in this internal membrane are placed the energy centers, just as it occurs in bacterias membrane. Finally, the sizes of the organelles are similar to the size of some procaryoteswhy parasitic worms do not have elaborate system
Enzymes and pH
2. What is the pH scale?
Which of the following statements stated below is precisely correct?
O
A. FADH2 is tightly linked to coenzyme Q, which forms complex ll of the electron transport chain.
O
B. FADH2 is able to deliver its high-energy electrons to coenzyme Q. complex III, cytochrome c, and complex IV.
C. FADH2 carries less high-energy electrons than NADH.
O p. Answers A and B are the right answer choices for this question.
O E. Answers A, B, and C are the right answer choices for this question.
Answer:
A
Explanation:
FADH2: High energy electron carrier used to transport electrons generated in Glycolysis and Krebs Cycle to the Electron Transport Chain.
Darwin and Wallace both observed greater species richness in the tropics than in Europe, but neither of them had a good explanation for why. One of the best-supported modern-day hypotheses to explain this pattern is that mutation rates are higher in the tropics than in temperate latitudes. Why would higher mutation rates lead to greater species richness
Answer:
Mutation shows the species energy relationships, tropics are more rich with energy as compared to the temperate europe.
Explanation:
The rate of species evolution is defined by the type of environment or the natural surroundings it lives in. Mutations Can affect organisms by making changes in their physical characteristics. Such can impact their DNA code and may even lead to death in many. The richness of species in the tropics is due to the more warmer and humid climates. They are suited to the development and germination of certain bacterias and have certain climatic phenomena.1. Which statement describes only biotic factors in a forest ecosystem? *
A bird and a squirrel are living in a tree.
B . Birds and clouds are moving in the wind.
C .Sunlight, air, and water are used by the grass.
D. fish, rocks, and a turtle exist within a stream.
Answer:
A describes only biotic factors.
Explanation:
Biotic factors are defined as living things that play an important role in an ecosystem. A bird and a squirrel living on a tree are biotic factors of the forest ecosystem. Thus, option A is correct.
What is an ecosystem?An ecosystem is defined as the organization of the community together that involves the interaction between the biotic and the abiotic factor. The biotic factors include the organisms and the abiotic factors include the physical characteristic.
It is a complex system of various interconnected networks that includes biogeochemical cycles and the flow of energy. There are four ecosystems, including grassland, forest, desert, and tundra. The ecosystem includes the interdependent relationship necessary for the biosphere to exist.
The forest ecosystem includes biotic factors like a bird, squirrels, and trees. They are considered biotic as they are living things that undergo metabolic and cellular processes.
Therefore, option A. a bird, squirrel, and a tree are biotic factors of the forest ecosystem.
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Which statement is true based on the data in the table?
A. The United States uses more land to grow crops than to maintain forests
B. The United States uses more land for parks and wildlife than for forests
C. The United States uses more land for parks and forests than for urban areas.
D. The United States uses more land for urban areas than for grasslands and ranges
Answer:
C. The United States uses more land for parks and forests than for urban areas.
Explanation:
According to the given data, the size of land used for parks and forests in United States is 313 million acres. The land used for urban areas is 61 million acres. This data here presents a comparative detail of the size of land and the purpose it is used for.
The maximum land used by United States is for forest area and grass range. This depicts that more stress is levied on keeping the land green.
Answer:
C.
Explanation:
Person above is right.
2. Why is the cell cycle important?
A. O it enables organisms to grow, develop, and maintain healthy cell tissue
B. O it causes fertilization of eggs, enabling sexual reproduction
C. O it regulates the use of nutrients and energy by organisms
D. O it determines the fate of undifferentiated stem cells in organisms
Explanation:
The cell cycle is the replication and reproduction of cells, whether in eukaryotes or prokaryotes. It is important to organisms in different ways, but overall it allows them to survive. ... Plants require the cell cycle to grow and provide life for every other organism on earth.
11. Liquid methane has a heat of vaporization of 122 calories per gram (cal/g). Compare the
effectiveness of liquid methane and water for evaporative cooling.
Answer:
Water is more effective for evaporative cooling than liquid methane since, it would result in a higher temperature drop for the same mass of liquid methane.
Explanation:
Since the heat of vaporization of water is 540 calories per gram and that of liquid methane is 122 calories per gram, for each gram of the water evaporated, 540 calories is lost while for each gram of liquid methane evaporated, 122 calories is lost.
Since a higher heat loss would result in a higher temperature drop, water is more effective for evaporative cooling than liquid methane since, it would result in a higher temperature drop for the same mass of liquid methane.
Plz answer this test ASAP
The cardiovascular system is composed of two circulatory paths: pulmonary circulation and systemic circulation.
Pulmonary circulation transports deoxygenated blood from the right side of the heart to the
A. left side of the heart where it is pumped to the lungs for oxygenation
B. lungs where blood picks up oxygen and returns to the left side of the heart
C. lungs where blood picks up oxygen and returns to the right side of the heart
D. lungs where the blood picks up oxygen and transports it to the tissues of the body
Answer:
B. lungs where blood picks up oxygen and returns to the left side of the heart.
Explanation:
In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.
Generally, the cardiac cycle occurs in two (2) stages;
1. Diastole : in this stage, the ventricles is relaxed and would be filled with blood.
2. Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.
The cardiovascular system comprises of two circulatory paths:
I. Pulmonary circulation.
II. Systemic circulation.
Pulmonary circulation transports deoxygenated blood from the right side of the heart to the lungs where blood picks up oxygen and returns to the left side of the heart.
The pulmonary circulation loop is mainly supported (powered) by the right atrium and right ventricle.
Additionally, the right atrioventricular valve (AV) also referred to as the tricuspid valve is located on the right dorsal side of the human heart. The right atrioventricular valve (AV) comprises of three (3) leaflets (flaps) which opens and closes in order to allow for the flow of blood from the right atrium of the human heart to the right ventricle. Also, the right atrioventricular valve is saddled with the responsibility of preventing blood from flowing backward in the mammalian heart.
When completing this exercise, it may be useful to refer back to Labs 10-12 for information about living primates. In 2009, a new fossil species, called Darwinius masillae, was identified in Germany, represented by a nearly complete skeleton nicknamed Ida (depicted on p. 387 of your lab manual). It lived around 47 mya. It had a small brain, short protruding snout, large eyes, and postorbital bar. Its diet probably included a lot of fruit and leaves. It did not have a dental comb. It had nails instead of claws and was probably an arboreal quadruped. Researchers disagree about whether the fossil is more similar to living haplorhines (tarsiers, monkeys, and apes) or more similar to strepsirhines (lemurs and lorises). The skeleton is about 23 inches (58 cm) long including the tail, and has a body length of about 9 inches (24 cm) without the tail. Describe at least two features that Darwinius shares with living haplorhines.
Answer:
short protruding snoutlarge eyesIt had nails instead of clawsAbsence of dental combLong tailExplanation:
Haplorhines and Ida share the following characteristics:
- Both of them have plane nails in their fingers instead of claws. Nails are useful while eating and grooming. They might be necessary for defense too.
- They have a short snout, which is the cause of a poorly specialized olfactive perception.
- Neither of them has the dental comb characteristic of strepsirrhines.
- Eyes are big, located in the frontal area of the skull, and facing front. Vision sense is very developed. They have binocular vision, which allows them to calculate distances.
- The long tail is shared by both groups. Used during motion, to equilibrate, to hold, or grab.
Analyzing the following tree, prove the relationship between ray-finned fish and crocodiles using the characteristics given below. Include at least three (3) characteristics that the organisms DO NOT have in common and one characteristic that they DO have in common. Your paragraph should be at least four (4) sentences. Remember to answer in COMPLETE sentences and use proper grammar.
Answer:
The Ray- Finned Fish has a bony skeleton just like crocodiles. Crocodiles evolved more and adapted to their environment. Along the way Crocodiles grew to have four limbs, were born from an amniotic egg, and then their eggs also have shells, unlike the Ray-finned fish. Therefore the three characteristics they do NOT have in common are: Four Limbs, Amniotic Egg, and Eggs with Shells. The one trait they do have in common is Bony Skeletons. They also both have vertebrae.
Look at the picture below. In which part of the plant does the most photosynthesis occur?
Answer:
B
Explanation:
Photosynthesis occurs most in the leaf.
does anyone know how to do this?
6. Wave and tidal power are expensive to maintain.
true
false
Answer:
true
Explanation:
A Shut the water off except during lunch time.
B Take out all classroom faucets
C Fix the leaks in the faucets, water fountains, and toilets.
D Shut water off during the weekend while school is not in session.
DNA and Biochemistry examples
which lymphoid organs atrophies with age???????
a)Peyer patches
b)Thymus
c)Bone marrow
d)Spleen
answer plz (╯︵╰,)
Suppose all the alleles on on the left and right chromosomes switched places but kept the same order. Would the organism be different? Why or Why not?
Answer:
No
Explanation:
The chromosome will stay the same organism.
The organism would be same in both homogenous and heterogenous chromosome . Therefore, switching the alleles won't change the organism if order is maintained.
What is chromosome and its type ?The thread-like chromosomes that convey the genomic information from cell to cell are formed of protein and a single DNA molecule. Chromosomes are found in the nucleus of cells in both plants and animals, including humans.
An organism is said to be homozygous if it has identical genes on both chromosomes. It is referred to as heterozygous if the organism possesses two distinct alleles of the gene.
Therefore, if the alleles switched places but the order remains same then organism will be same too in case of homologus as well as heterologus chromosome.
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Need help with this one :)
Answer:
Your answer would be D: Carnivorous
Hope this helps out =)
5 Which word should replace the question mark in the diagram? ? Water droplet Reflection А Refraction B Reflection C Light energy D Rainbow
Answer:
percipitation
Explanation:
I took this class already
Make a comics strip of your successful life starting today until 20 years later.
Answer:A comic strip is a sequence of drawings, often cartoon, arranged in interrelated panels to display brief humor or form a narrative, often serialized, with text in balloons and captions. Traditionally, throughout the 20th and into the 21st century, these have been published in newspapers and magazines, with daily horizontal strips printed in black-and-white in newspapers, while Sunday papers offered longer sequences in special color comics sections. With the advent of the internet, online comic strips began to appear as webcomics.
Explanation:
Comic strips are used to tell a story. The three crucial elements of a story are setting, characters, and plot. Comic books evenly mix text and visuals. In comic strips, the evolution of the tale is shown by a sequence of frames.
What role of comics strips?A comic strip is a collection of images, frequently cartoons, that are arranged in related panels to tell a story or display quick humor. They are frequently serialized and have captions and text in balloons.
The 20th and into the 21st century saw the traditional printing of these in newspapers and periodicals.
Therefore, Daily horizontal strips were printed in newspapers in black and white, while Sunday papers offered lengthier sequences in specialized color comics sections. As the internet expanded, webcomics—online comic strips—started to appear.
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Describing the path of a water molecule through a convection current
Answer:
When we heat a container full of water, the water in the lower part of the container i.e. near the flame gets heated first. Warm water rises up and the cold water rushes below to take its place. This water again gets heated and rises up and the cycle continues.
which of these BEST describes the formation of earth
a. earth was formed when Jupiter, the largest planet split into smaller pieces during its formation
b. earth was formed from a cloud of gas and dust spinning and moving some distance from the sun.
c. earth was formed from the collision of multiple asteroids. the asteroids merged into a planet.
d. earth was formed when a piece of the sun broke off the star as it was forming
Answer:
b. earth was formed from a cloud of gas and dust spinning and moving some distance from the sun.
Explain how cladograms shows relationships between organisms.
Answer:
A cladogram is a diagram used to represent a hypothetical relationship between groups of animals called a phylogeny. a cladogram is used by scientists studying phylogenetic systematics to visualize the groups of organisms being compared, how they related, and the most common ancestors.
Explanation:
Hope this helped Mark BRAINLEST!!!!
Which sequence of events best describes the current theory of the origin of life on Earth?
RNA formation→DNA formation→Development of simple bacteria
Development of simple bacteria→DNA formation→RNA formation
DNA formation→RNA formation→Development of simple bacteria
Development of simple bacteria→RNA formation→DNA formation
Answer:
The correct answer is - Development of simple bacteria→RNA formation→DNA formation
Explanation:
According to the hypothesis and researchers, it seems to confirm that RNA was the first genetic or hereditary material that was present in the simple form of bacteria developed first.
RNA is the molecule responsible for the origin of life on the earth and evolved all the required processes and methods for carrying and expressing the genetic information of an organism before DNA. DNA is evolved from RNA molecules of simple bacteria.
Gravitropism ensures that the plant in the figure will
A.)grow roots into the soil.
B.)wrap tightly around a trellis.
C.)grow toward a light source.
D.)have shoots that grow toward the soil.
What is dialog?
A. A special kind of log only found in Scandinavian forests
B. all the words in a story
C. The words characters say
D. the characters in the story
Answer:is b why because take part in a conversation or discussion to resolve a problem.
Explanation:
The lac operon controls the transcription of a group of genes involved in metabolizing lactose in E. coli. A group of scientists tested how to activate the lac operon. In four different mediums, they varied whether glucose or lactose was present in the medium, as indicated by a or -.The scientist discovered that the lac operon is inducible, repressed by glucose and induced by allolactose. Which medium has the right conditions to metabolize lactose
Answer:
The correct answer would be - medium with lactose present and glucose absent.
Explanation:
There are genes present in lac operon that takes part in the lactose metabolism. These genes expressed only if a medium has lactose in absence of glucose.
In the absence of glucose and lactose is present, due to inducer the lac repressor is removed from the operator. This leads to the binding of CAMP to DNA as the CAMP levels are high. It helps in high transcription levels b binding RNA polymerase to promotor.
Which best describes a method of obtaining energy that may cause changes in
water temperature and harm to fish populations?
A burning coal
B using ethanol in cars
C installing solar panels on a home
D generating electricity in a hydroelectric power plant
Group of answer choices
Answer:
D. generating electricity in a hydroelectric power plant.
Explanation:
Renewable energy is also known as clean energy and it can be defined as a type of energy that are generated through natural sources or technology-based processes that are replenished constantly. Some examples of these natural sources are water (hydropower), wind (wind energy), sun (solar power), geothermal, biomass, waves etc.
Basically, a renewable energy source is sustainable and as such can not be exhausted.
Generating electricity in a hydroelectric power plant best describes a method of obtaining energy which may cause changes in water temperature and harm to fish populations. This is due to the operation of powerful electric steam turbines operating at high voltage.
Mendel found that crossing wrinkle-seeded plants with pure round-seeded plants produced only round-seeded
plants.
Part A
Which trait is dominant?
A Round
B Wrinkled
C Peas
D Mendel
Answer:
round is the dominant triat