Answer:
Mitochondria and chloroplasts are semiautonomous organelles, with many similarities to bacteria.Mitochondria resemble bacteria in size and shape and are surrounded by double membranes, the inner of which has bacterial-type lipids. Chloroplasts have circular DNA molecules.Explanation:
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. On the contrary, these bacteria were able to adapt to their host in such a way that the two cells established a dependent relationship with each other.
Due to its similarities to other free-living bacteria, it has been speculated that chloroplasts must derivate from cyanobacteria (they both absorb sunlight and store the energy in ATP, and produce organic molecules) and that mitochondria must derivate from rickettsias (they produce ATP in the same manner, by using the Krebs Cycle and Oxidative Phosphorylation).
From the phagocytosis moment, these two cells created a new bond between them of mutual benefit, becoming dependant on each other, up to the point that they would not be able to survive without the other one.
This theory is supported by a few characteristics of the chloroplasts and mitochondria that suggest that they once were a free cell. For example,
Both organelles present their own genetic material. This DNI is independent of the DNA of the cells, is bi-catenary and circular, identical to the DNA of the bacteria, and very different from the one of the eukaryotic cells. These organelles divide by binary fission and not by mitosis, and are capable of synthesizing their own 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 membrane of bacterias, while the external membrane looks like the eukaryotic one.In fact, in this internal membrane are placed the energy centers, exactly as it occurs in bacterias membrane.
Finally, the sizes of the organelles are similar to the size of some procaryotes.Which graph should be used to represent the
percent composition of the human body?
bar graph
line graph
pie graph
Answer:
I think its pie graph cause the other ones don't sound good...
Explanation:
i don't know I'm just here for the points... so yeah there u go I think this is the answer. so pie graph is the answer.
pls help with this its about science and i hate science so i need ur guys help pls!
Answer:
Number 1
Explanation:
6. What blood type is shown in the picture?
A
Rh
B
Answer:
B
Explanation:
Blood type is shown in the picture is B positive.
What do you mean by blood type?
"A blood type is a classification of blood, based on the presence and absence of antibodies and inherited antigenic substances on the surface of red blood cells."
What are the main blood types?
There are 4 main blood types or groups defined by the ABO system:
blood group A – has A antigens on the red blood cells with anti-B antibodies in the plasma.blood group B – has B antigens with anti-A antibodies in the plasma.blood group O – has no antigens, but both anti-A and anti-B antibodies in the plasma.blood group AB – has both A and B antigens, but no antibodies.
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why gasoline is it important for the environment
Answer:
As the cleanest-burning fossil fuel, natural gas plays an important role in improving the environment by reducing air pollution and greenhouse gas emissions across the U.S. Natural gas produces half as much carbon dioxide and an even smaller fraction of other air emission generated by coal.
Explanation:
The Fitness of Water. For each of these statements about water, decide whether the statement is true and describes a property that makes water a desirable component of cells (T); is true but describes a property that has no bearing on water as a cellular constituent (X); or is false (F). For each true statement, indicate a possible benefit to living organisms.
a. Water is a polar molecule and hence an excellent solvent for polar compounds.
b. Water can be formed by the reduction of molecular oxygen O2.
c. The density of water is less thaan the density of ice.
d. The molecules of liquid water are extensively hydrogen-bonded to one another.
e. Water is odorless and tasteless.
f. Water has a high specific heat.
g. Water has a high heat of vaporization.
Answer:
A) True
The polarity of water is what makes it an ideal transport vehicle for nutrients and micronutrients that are water-soluble. Within organisms, water can be used to transport nutrients and even waste from one part of the body to the other. In the case of humans, urine is used to get rid of soluble waste from within the body.
B) True
During the process of photosynthesis, carbon dioxide (CO2) and water (H2O) are taken from the air and soil respectively. Oxygen is able to produce water when it is reduced. Hydrogen during this process is oxidized.
C) False
Ice floats on water. Hence it cannot be denser than water. Rather, water is denser than Ice. Because of the structure of hydrogen bonds, when they are iced, the bonds tend to pull apart, thus making ice expand somewhat. This expansion creates microscopic pockets of air in the molecules thus given them buoyancy.
D) True (X)
E) True (X)
F) True
Heat Capacity refers to the amount of heat a substance like water can absorb before it's temperature rises by 1 degree. This property is important, because, were it not for the high specific heat capacity of water, many people and plants would have boiled over.
G True (X)
Heat of vaporization is the kind and amount of energy required to alter one gram of liquid into a gas at boiling point
Cheers
What is one reason why rock layers are not horizontal?
They were formed at an angle.
They were formed veritcally.
The area was once covered by water.
A force pushed the rock layers after they were formed.
Answer:
the last one, as they would be pushed together either going up or down when tectonic plates shift.
Explanation:
Answer: A force pushed the rock layers after they were formed.
Explanation:
What effect do instincts have on an animal's survival?
Answer:
The survival instincts is like a switch that goes off in the most adverse situations and activates the animals ingenuity to save themselves.
Explanation:
Living things share many basic characteristics and needs. One characteristic is the need to maintain the internal conditions of their bodies, even if outside conditions change. Maintaining ___________ involves controlling the balance of water and minerals in the body, responding to changes in the environment, and controlling metabolism.
homeostasis
cellular organization
heredity
metabolism
Answer:
The answer is homeostasis.
Explanation:
In biology, homeostasis is the state of steady internal, physical, and chemical conditions maintained by living systems. This is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits.
The increased subsidence of southern Louisiana, from 3 ft to 12 ft every 100 years, contributed to the effects of Hurricane Katrina.
Which of the following is not a cause of this subsidence?
A)
the extraction of groundwater
B)
the extraction of oil and gas
C)
the loss of freshwater wetlands
D)
the lack of tall trees such as cypress
E)
the practice of building on hilly areas
Answer:
Types of Wetlands
tupelo gum trees
Tupelo Gum Pond, Source: Missouri Dept of Conservation
Answer: E.) the practice of building on hilly areas
Explanation: got it right on edge 2021! :)
Which of the following is a terrestrial planet?
A. Earth
B. Jupiter
C. Saturn
Answer:
A
Explanation:
Answer:
a
Explanation:
in a cladogram-
A. the most ancient organism, called the origin, are found at the very base of the tree diagram
B. The closer the branch point is to an organism, the more related those organisms are
C. neither A nor B are true
D. both A and B are true
Answer:
its A
Explanation: its a
Explain the benefits for the administration of an isotonic solution?
Can someone help me find the words?
Word search only answer if you an expert at it PLEASE
Answer:
so u see
Explanation:
Please help I will fail and I’m confused
Answer:
b- a genetic mutation must have occurred
Explanation:
Describe how changes in the lining shown in the diagram adapt it for its function if an egg is fertilised
Answer:
The lining in the womb becomes thicker and spongy to protect the embryo/foetus in all stages of life inside the womb and to stop damage/harm coming to it
Explanation:
Where in the world is the highest temperature, relative to precipitation?
Suppose you are a research assistant in a lab studying DNADNA-binding proteins. You have been given the amino acid sequences of all the proteins encoded by the genome of a certain species and have been asked to find candidate proteins that could bind DNADNA. What type of amino acids would you expect to see in the DNADNA-binding regions of such proteins
Answer:
The correct answer would be - Positively charged amino acid at pH 7 such as lysine, arginine, and histidine.
Explanation:
We know that DNA is a negatively charged molecule and proteins bind with them. This binding takes place between negative DNA molecules and positively charged amino acids of DNA binding protein.
Amino acids form hydrogen bonds with the nitrogen bases or phosphate groups of the DNA. Therefore, the DNA binding amino acid sequence should be of positively charged amino acids like lysine, arginine, and histidine at pH 7.
Through the process of transformation, bacteria cells can take up plasmids that contain recombinant DNA
TRUE or FALSE
Answer:
true
Explanation:
Which of the following places is generally not considered an open system?
A) the Pacific Ocean
B) the Earth
C) the Amazon Rainforest
D) the Nile River
Answer:
B) The Earth
Explanation:
Edg 2021
Define Global Warming
Answer:
a gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide, chlorofluorocarbons, and other pollutants.
Answer:
a gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide, chlorofluorocarbons, and other pollutants.
Explanation:
Geology- approximately how much more energy is released in a 7.5 richter magnitudue earthquake than a 5.5?
Answer:
About 2000 thousand times more
Explanation:
The amount of energy released in a 7.5 richter magnitudue earthquake than a 5.5 is 4,462,369,085,588,121 Joules greater than 5.5 scale.
What is the Richter magnitude scale?The Richter scale or the Richter magnitude scale is a measure of the strength of earthquakes, which are developed by Charles Francis Richter and was presented in his landmark 1935 review paper, where he called it the magnitude scale. This paper was later revised and renamed as the local magnitude scale, which is denoted as ML .
The Richter magnitude of an earthquake can be determined from the logarithm of the amplitude of waves which are recorded by seismographs.
The energy of the earthquake with magnitude 5.5 is 4,466,835,921,510 J and with magnitude 7.5 is 4,466,835,921,509,631 J.
The energy released = 4,462,369,085,588,121 Joules
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A segment of RNA reads A U G U C C A C A. Use the codon table to determine what sequence of amino acids for the segment should be?
Answer:
Met-ser-thr
Explanation:
Im good at this stuff xd
Help me out here? 10 Points!
Answer:
I did that yesterday
i can help
What are the answers too those
Answer:
a, d, b, c, a, c, d, b, a, d,
Explanation:
why does flowing water deposit the largest particles first
Answer:
Deposition by Water
Flowing water slows down when it reaches flatter land. ... The water starts dropping the particles it was carrying. As the water slows, it drops the largest particles first. The smallest particles settle last.
which statement describes two organ systems working together to deliver nutrients to cells?
A. The excretory system removes excess nutrients from blood as it
makes urine.
B. The blood absorbs the nutrients that the digestive system obtains
from food.
C. The respiratory system transfers oxygen removed from nutrients
to the blood.
D. The molecules of important nutrients are made from food in the digestive system
Answer:
option B is the correct answer
Explanation:
the circulatory system and digestive system both are working to deliver food to each and every cell.
plz mark my answer as brainlist plzzzz.hope this will be helpful to you and plzzz.
B) The blood absorbs the nutrients that the digestive system obtains from food the two organ systems work together to deliver nutrients to cells.
The circulatory system and digestive system both are working to deliver food to each and every cell.
How do organ structures get meals to the cells?The digestive system converts the ingredients we consume into their simplest bureaucracy, like glucose (sugars), amino acids (that make up protein), or fatty acids (that makeup fat). The damaged-down meals are then absorbed into the bloodstream from the small intestine and the nutrients are carried to every mobile in the body.
These frame structures are all characteristic to maintain the cells in your frame: the circulatory, respiration, and digestive structures provide the nutrients and electricity your cells need to stay. The immune gadget protects these cells from pathogens.Your circulatory gadget, which consists of your coronary heart, blood, and blood vessels, is liable for transporting vitamins to the cells of your body. Particularly, nutrients are transported at some stage in your frame thru your blood thru capillaries, tiny blood vessels that join arteries to veins.
The cell consists of three components: the cell membrane, the nucleus, and, between the 2, the cytoplasm. In the cytoplasm lie complicated arrangements of first-class fibers and loads or maybe hundreds of minuscule but awesome structures known as organelles.
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In a cross of purple flowered heterozygous plants (Pp), the letter P represents the allele for purple flowers and the letter p represents the allele for white flowers.
What is the probability that an offspring of this cross expresses plants with purple flower phenotypes?
A. 0
B. 1/4
C. 1/2
D. 3/4
Answer:
D. 3/4
Explanation:
I took the test and got it right.
describe how a supernova and neutron star are related?
Answer:
Neutron stars are one of the possible ends for a star. They result from massive stars which have mass greater than 4 to 8 times that of our Sun. After these stars have finished burning their nuclear fuel, they undergo a supernova explosion. ... It collapses so much that protons and electrons combine to form neutrons.
Why is it important that the inner membrane of the mitochondria be folded in both plant and animal cells?
Punnett squares provide an easy way to predict the possible genotypes for an offspring, but it is not practical to perform a Punnett square analysis on all possible combinations of all members of a population to predict what the population might look like in the future.
a. True
b. False
Answer:
True
Explanation:
There are certain limitations associated with the Punnett Squares. They are not useful in case of complex genetic inheritance such as linkage between two genes. In case of linkages it becomes difficult to estimate the distribution of genotypes and phenotypes. For example in case of Nail-patella Syndrome and gene associated with blood group two genes lie on the same chromosome in close vicinity and hence there are high chances of inheritance of these traits in the offspring from the parent thereby causing random distribution of the two traits. This random distribution cannot be captured through punnet square.
The same problem is associated in case where a single gene is determined by multiple genes with graded effects of each gene.