Answer:
The answer is tiny organisms known as cyanobacteria, or blue-green algae. These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen. ... "What it looks like is that oxygen was first produced somewhere around 2.7 billion to 2.8 billon years ago.
Explanation:
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answer you have 20 mins!!!
No Bots Or I Will Report!!!!
Answer:
i do not your question I'm sorry
mitotic spindle fibers are composed of what cellular components?
Answer:
They are composed of microtubules
Explanation:
The mitotic spindle is a structure composed of microtubules which segregates chromosomes into the daughter cells during mitosis. A microtubule is a rope-like component of the cytoskeleton. The centrosome is an organelle that serves as a microtubule organizing center during cell division.
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Describe the structures and functions of each of the four groups of macromolecules. (Carbohydrates, Lipids, Nucleic Acids, Proteins)
Answer:
Nucleic acids: Stores and transfers info.
Carbohydrates; Store energy, provide fuel, and build structure in body, main source of energy, structure of plant cell wall.
Lipid: Insulator and stores fat and energy.
Protein: Provide structural support,transport, enzymes, movement, defense.
Suggest why cells need to differentiate
Answer:
The lower the pressure, the lower a liquid's boiling point is. That's why water boils much faster at the top of a mountain than it does at the bottom. In space, there is no pressure. So the boiling point could easily drop to your body temperature.
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A map of eastern North America, showing the pH of rainfall in the various states, indicates that the pH of rain in New York State varies from 4.22 to 4.40. According to these figures, the most acidic rainfall in New York has a pH of
Answer:
4.22
Explanation:
The lower the number, the more acidic.
How can you avoid or manage
Type 1 and Type 2 diabetes
Answer:
as we all know, diabetes can only be prevented by eating very very very less sugar. Diabetes type 1 and 2 can be prevented both by eating sugar free meals
what is the main artery that carries blood to your brain
which type of rna is involved in protein synthesis
BRAINLEST FOR EVER ANSWERS FIRST IN CORRECT
the center of a cinder cone/composite volcano will have a _____?
calderas
fumarole
conduits
crater
Answer:
Answer is the 2nd one
Explanation:
Not only 2nd th 3rd cause the fourth one and the first one is not quite right.
put the life cycle of an erythrocyte in order, beginning with their formation in red bone marrow.
Answer:Correct: 1
Erythrocytes form in red bone marrow.
Correct: 4
Hemoglobin is converted to biliverdin.
Correct: 3
Erythrocytes are phagocytized in the liver and
spleen.
Correct: 2
Erythrocytes circulate for 120 days in the bloodstream.
Explanation:
The life cycle of an erythrocyte (red blood cell) involves several stages. Here's the order of the life cycle, beginning with their formation in red bone marrow:
1. Hematopoietic Stem Cell: Erythrocytes are derived from hematopoietic stem cells in the red bone marrow. These stem cells have the potential to differentiate into various types of blood cells, including erythrocytes.
2. Proerythroblast: Hematopoietic stem cells differentiate into proerythroblasts, which are the earliest precursor cells committed to becoming erythrocytes. Proerythroblasts undergo several divisions to produce cells of the erythroblast series.
3. Erythroblast Stages: Erythroblasts progress through several stages of development, including basophilic erythroblast, polychromatic erythroblast, and orthochromatic erythroblast.
4. Reticulocyte Formation: The orthochromatic erythroblast matures into a reticulocyte. Reticulocytes still contain some organelles but lack a nucleus. They are released into the bloodstream and enter circulation.
5. Circulation: Reticulocytes circulate in the bloodstream for about 1-2 days. During this time, they lose their remaining organelles, and their reticulated appearance disappears as they become mature erythrocytes.
6. Mature Erythrocyte: Reticulocytes mature into mature erythrocytes, which are specialized cells optimized for oxygen transport. Erythrocytes have a biconcave shape, lack a nucleus, and are packed with hemoglobin.
7. Functional Period: Mature erythrocytes have a lifespan of about 120 days in circulation. During this time, they transport oxygen from the lungs to body tissues and carry carbon dioxide from tissues to the lungs for exhalation.
8. Removal: Aging or damaged erythrocytes are recognized by macrophages in the spleen, liver, and bone marrow. These macrophages phagocytose the erythrocytes, breaking them down and recycling their components.
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In which type of fault is the hanging wall above the footwall?
normal
reverse
strike-slip
horizontal
Answer:
B. Reverse
Explanation:
Got it right on edgeA hanging wall and footwall are present in every fault that is inclined from vertical. In reverse type of fault is the hanging wall above the footwall. Therefore, option B is correct.
What is footwall ?The higher or overlaying block along the fault plane is referred to as the hanging wall, or headwall, and the block below is referred to as the footwall as rocks slide past one another during faulting. The direction in which the fault plane and Earth's surface collide is known as the fault strike.
The rock above the fault zone in a cross-section view of a fault is referred to as the hanging wall.The foot wall refers to the rock beneath the fault zone.
Consider digging a mine along the fault line to help you distinguish between the two. The footwall is the brick directly beneath your feet, and it is also the one on which you would hang your miner's lantern.
Thus, option B is correct.
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A large protein needs to enter a cell to help preform a function explain what process the cell must use to allow the protein to enter and why
Answer:
The protein is too large to simply diffuse across the phospholipid bilayer of the cell, so it uses phagocytosis to diffuse across, where it is contained in a vesicle and pinched into the cell? Credits to yahoo answer. Hope I could help sweets.
Cell membranes acts as a barrier for the large,charged and polar molecules due to their hydrophobic nature.
These molecules are transported with the help of membrane proteins such as carrier proteins across the plasma membrane by a process known as facilitated diffusion. These membrane proteins diffuse larger molecules across the cell membrane that cannot be transported by simple diffusion.
The ________ plate method involves spreading an inoculum onto the surface of a plate in a pattern that results in isolated colonies in some areas of the plate after incubation, whereas the ________ plate method involves diluting an inoculum into several melted agar tubes and then adding their contents into plates for solidification and incubation.
Answer:
Streak, pour.
what is the transfer of energy in the form of electromagnetice waves
Answer: Electromagnetic radiation.
Explanation: The transfer of energy by electromagnetic waves is called electromagnetic radiation. Electromagnetic waves can transfer energy through matter or across empty space.
using the chart at the beginning of the animation and your knowledge of cells, what stage of the cell cycle do most cells spend the majority of their lives?
Mrs. Blue and Mrs. Green had babies at the same hospital and at the same time. Mrs. Blue took home a girl and named her Nancy. Mrs. Green took home a boy and named him John. However, Mrs. Green was sure she had a girl and brought suit against the hospital. Blood tests showed that Mr. Green was type O, Mrs. Green was type AB, and Mr. and Mrs. Blue were both type B. Nancy was type A, and John was type O.
Required:
Was there a mix-up at the hospital?
Answer:
no there was not
Some bacteria are aerobic and others are anaerobic. What does this mean?
A.
Some use H2O (water), and others do not.
B.
Some use CO2 (carbon dioxide), and others do not.
C.
Some use air, and others do not.
D.
Some use O2 (oxygen), and others do not.
Answer:
D. Some use O2 (oxygen), and others do not.
Explanation:
Bacteria can either grow aerobically or anaerobically. Because of their ability to respire and ferment organic substances, these types of bacteria (facultative anaerobes), can continue growing in the presence or the absence of oxygen.
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Answer:
They would perform aerobic processes.
Explanation:
When exposed to a lack of oxygen, facultative anaerobes develop metabolic processes with oxygen, like respiration. But in the absence of oxygen, they can develop processes like fermentation. When in oxygen, they prefer the use of it, because that's what makes them facultative, the fact that they're able to work in both circumstances. Otherwise, tolerants are able to survive but not to work properly, in different environments.
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which layer of the atmosphere has no definite outer limit?
Answer:
the stratosphere
Explanation:
Answer:
It is the Exosphere
Explanation:
The Exosphere is debated to even be a part of the earth's atmosphere since it fades out to outer space.
the plasma membrane of skeletal muscle is called the:
Answer:
Muscle Fiber or the sarcolemma
Explanation:
which contains sarcoplasm, the cytoplasm of muscle cells.
what are the two major anatomical subdivisions of the nervous system?
Answer: The nervous system has two main parts:
The central nervous system is made up of the brain and spinal cord.
The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.
Explanation:
where does pyruvate oxidation occur in eukaryotic cells
Answer:
mitochondrial matrix
Explanation:
Answer:
Pyruvate is produced during glycolysis in the cytoplasm, but pyruvate oxidation occurs in the mitochondrial matrix (in eukaryotes).
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Explanation:
What physical quantity does symbol I stand for?
Answer:
Explanation:
ohm's law
V=IR
v = voltage
I= current
R = resistance
microorganisms are found in nearly every environment and are said to be
Answer: microorganisms are found in nearly every environment and are said to be ubiquitous
Explanation:
Have a nice study time
What bird species was most noticeably impacted by West Nile virus when the virus was first detected? Was this the only bird species affected by the virus?
Answer:
Mostly crows, robins, and jays were the first of a few bird species impacted by the West Nile Virus when it was detected.
No, there were over 300 species discovered to be affected by the virus, these were just the main ones to be impacted.
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Answer:
what
Explanation:
If a cell is placed in a hypertonic solution then?
Answer:
If you place an animal or a plant cell in a hypertonic solution, the cell shrinks, because it loses water ( water moves from a higher concentration inside the cell to a lower concentration outside ). ... A single animal cell ( like a red blood cell) placed in a hypotonic solution will fill up with water and then burst.
Explanation:
why does sound travel fast in increased pressure?
if the mass is 90g and the volume is 100 ml what is the density
Answer:
168.56
Explanation:
which statement about mitosis and cytokinesis is true
Answer:
At the end of cytokinesis there are two daughter cells with a normal complement of diploid genetic material.
Explanation:
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10. What 5 traits do the bird and its closest relative share?
Answer:
Feathers.
High metabolism.
A four-chambered heart.
A beak with no teeth.
A lightweight but strong skeleton.
Production of hard-shelled eggs.