BRAINLIEST
the diagram shows two cells found in human blood.
a. the actual diagram of
red blood cell is 0.007mm ( 7 um) in diameter.
Calculate the magnification of the diagram. show your working.
side note: I measured it in a ruler and it's 2.3 cm = 23 mm (drawn to scale)
Answers
a)
Actual diameter = 0.007 mm
Diameter of scaled diagram = 2.3 cm = 23 mm
Formula to use:
Magnification = scaled dimension/actual dimension
Magnification = 23/0.007
Magnification = 3285.714... → x3286
b)
Red blood cells (RBCs), otherwise known as erythrocytes, don't have nuclei and organelles such as mitochondria, are smaller than WBCs and have a biconcave disc shape ideal for purpose
c)
i.
RBCs transport oxygen inhaled into the lungs around the body to all tissues and organs
ii.
RBCs are void of organelles so they are maximally packed with haemoglobin to bind and transport oxygen;
The biconcave disc shape is ideal for flowing through the blood vessels, particularly the capillaries, optimising them for transporting oxygen;
The small size also helps in being able to circulate the vasculature effectively and successfully
a)Actual diameter = 0.007 mm
Diameter of scaled diagram = 2.3 cm = 23 mm
Formula to use:
Magnification = scaled dimension/actual dimension
Magnification = 23/0.007
Magnification = 3285.714... → x3286
b)Red blood cells (RBCs), otherwise known as erythrocytes, don't have nuclei and organelles such as mitochondria, are smaller than WBCs and have a biconcave disc shape ideal for the purpose.
c)i.RBCs transport oxygen inhaled into the lungs around the body to all tissues and organs
ii.RBCs are void of organelles so they are maximally packed with haemoglobin to bind and transport oxygen;
What are RBCs?The biconcave disc shape is ideal for flowing through the blood vessels, particularly the capillaries, optimising them for transporting oxygen;The small size also helps in being able to circulate the vasculature effectively and successfully.
Thus, these are the answer.
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Related Questions
Which body system is correctly paired with its function and interaction with the brain?
A. Digestive system; it ensures that toxic materials are not formed in the brain.
B. Skeletal system; it forms a protective structure that surrounds the brain.
C. Muscular system; it helps create energy for brain cells.
D. Excretory system; it eliminates excess carbon dioxide from the brain.
Answers
Answer:
B
Explanation:
the skull protects the brain
how are lymphatic capillaries different from blood capillaries?
Answers
Answer:
Lymphatic Capillaries are slightly larger in diameter than blood capillaries, and have closed ends (unlike the loop structure of blood capillaries). Their unique structure permits interstitial fluid to flow into them but not out.
Explanation:
which structure has the function of transferring the egg from the ovary to the uterus?
Answers
Explanation: female structures that transport the ova from the ovary to the uterus each month. In the presence of sperm and fertilization, the uterine tubes transport the fertilized egg to the uterus for implantation.
What is photosynthesis?
Answers
Answer:
photosynthesis is the process in which plants convert light energy, carbon dioxide, and water to create glucose which it uses to feed itself and oxygen which is expelled into our atmosphere helping us breathe
Explanation:
If you breathed in air that had a lower oxygen concentration than your blood, describe what would happen in your alveoli.
Answers
Answer:
internal respiration
Explanation:
internal respiration is described by what your asking so that shows the in your alveoli would react with internal respiration and if it says im wrong then i dont what.
now you’ll examine an operon that undergoes negative and positive control. the ara operon in e. coli codes for enzymes that metabolize the sugar arabinose, which e. coli can use for energy. as you can see in the diagram, the regulatory protein arac can act as both an activator and a repressor of the ara operon.
Answers
The lac operon is known to be able to undergoes negative and positive control.
The diagram based on the 4 table arrangement is filled up below (Right to left);
In the presence of arabinose: initiator, activator, yes, yes.In the absence of arabinose: initiator and operator, repressor, no, no.
If a mutation prevents arabinose from biding to AraC: initiator and operator, repressor, no, no.
If arabinose is present but a mutation and AraD enzyme renders it non-functional: initiator, activator, yes, no.
The metabolism of the sugar arabinose is known to be influenced by an operon that is said to undergo both positive control and negative control.
Transcription of the ara operon is lead by the regulatory protein AraC, which then bound to the DNA.
When arabinose is present, it binds to AraC, and both parts of the AraC dimer are then also bound to the initiator, making transcription to move foreword.
When arabinose is absent, one part of the AraC dimer is often bounded to the initiator, while the other part is bounded to the operator, thereby hindering transcription.
See full question below
Now you'll examine an operon that undergoes negative and positive control. The ara operon in E. coli codes for enzymes that metabolize the sugar arabinose, which E. coli can use for energy. As you can see in the diagram, the regulatory protein AraC can act as both an activator and a repressor of the ara operon.
Use the diagram above to fill in the table.
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PLEASE HELP QUICKLY!!!!!!!!!!!!!!
Which of the following best describes how you know the matter that makes up the sequoia tree comes from your answer in the previous question.
A. All the energy comes from the sun, so it would make sense that any matter we get would also come ultimately from the sun. Without the sun, no photosynthesis would happen
B. Water and carbon dioxide supply us with the matter and they are the inputs for photosynthesis, and everything starts with photosynthesis
C. Our bodies are made of over 90% water, so we essentially are water which is an input for photosynthesis
D. We are made of carbon-based molecules and that carbon needs to come from somewhere, so the carbon comes from the glucose we eat which came from the carbon dioxide.
E. Glucose is eaten by us which is then used to build oxygen and carbon dioxide molecules that will get released back into the air. We are able to make air which is an example of matter/mass in our biosphere
I know it's either D or E
Answers
Answer:
D
Explanation:
My intuition told me so
The oldest living plants are __________. Your text describes one such plant,that is more than __________ years old.
Answers
Answer:
the oldest living plant is seagrass colony
Explaination:
The plant is over 100000 years old
True or False: Increases in the width of long bones is a result of bone modeling.
Answers
Answer:
TRUE is correct
Explanation: protecting the post.
Answer:
Explanation:
True
Oxygen sag curves can occur in streams when ____. Group of answer choices bacteria break down biodegradable wastes salt and fresh water mix water flows quickly water levels are high water is cool or cold
Answers
Oxygen sag curves can occur in streams when bacteria break down biodegradable wastes salt and fresh water mix water flows quickly water levels are high water is cool .
What is biodegradable waste?The waste which has been recycled and converted into nutrients for plants as well as crops and for other use are known as biodegradable waste. It has been also known as any organic matter in waste which can be broken down into carbon dioxide, water, methane or simple organic molecules by micro-organisms and other living things.
Composting has been possible with the wastes which can decay by itself, like fruit and vegetable peels, leaves, flowers etc. Non biodegradable wastes will not decay by itself.
Therefore, Oxygen sag curves can occur in streams when bacteria break down biodegradable wastes salt and fresh water mix water flows quickly water levels are high water is cool.
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A goniometer measures __________. A. A joint's maximum range of motion B. A joint's minimum range of motion C. A joint's flexion D. Extension and hyperextension Please select the best answer from the choices provided. A B C D.
Answers
A goniometer measures __________..
Answer : A
Explanation : A joint's maximum range of motion
Hope this helps you!
Answer:
A. a joint's maximum range of motion
Explanation:
A goniometer is a device that is used to measure the maximum arc of motion made by a joint. The traditional goniometer consists of a protractor and two extending arms ,one of the arms is movable while the other one is stationary.To take measurements the center of the goniometer is aligned with the center of a joint. Then the arm of the goniometer is moved until it aligns with the limb that has been moved to a maximum position that the joint allows. The angle made between the two arms of the goniometer is measured in degrees and is the maximum range of motion of the joint.
What change in the mass number of a nucleus occurs when the nucleus emits an alpha particle?
Answers
Answer:
Protons are positively charged. When a nucleus emits an alpha particle, these changes happen: the mass number decreases by 4. the atomic number decreases by 2.
Explanation:
Protons are positively charged. When a nucleus emits an alpha particle, these changes happen: the mass number decreases by 4. the atomic number decreases by 2.
True/False. All mutations are bad.
Answers
False.
There are several good mutations that have ensured the survival of species. Typically helpful mutations help the creature adapt to its environment or protect itself from predators.
I hope this helps! :)
explain the effects of removing one organism from a terrestrial food web
Answers
Answer: If one species in the food web ceases to exist, one or more members in the rest of the chain could cease to exist too. A plant or animal doesn't even have to become extinct to affect one of its predators.
Explanation:
by moving substances into and out of cells,_____, the process of keeping stable conditions inside a cell, is maintained
Answers
Answer:
love you quieres ser mi novio
Answer:
Homeostasis
Explanation:
This process maintains sugar, salt nutrients and other substances within a certain range to maintain safety
a difference between bacterial and eukaryotic transcription
Answers
Answer:
According to Wikipedia, In bacteria, transcription and translation can occur simultaneously in the cytoplasm of the cell, whereas in eukaryotes transcription occurs in the nucleus and translation occurs in the cytoplasm.
GIVE BRAINLIEST PLZ! :)
The difference between bacterial and eukaryotic transcription is that in bacteria, transcription and translation can occur simultaneously in the cytoplasm of the cell, whereas in eukaryotes transcription occurs in the nucleus and translation occurs in the cytoplasm.
What is the difference between eukaryotes and prokaryotes?The main difference between eukaryotes and prokaryotes is that the eukaryotes are well developed and advanced and have different cell organelles and they have different functions in the cell and the prokaryotes are not well developed and they are found in the unicellular organisms.
The unicellular organisms are made of one cell and carry out the processes of life as a single cell and the multicellular organisms are made up of two or more cells that have specific functions to contribute to the life processes.
Therefore, The difference between bacterial and eukaryotic transcription is that in bacteria, transcription and translation can occur simultaneously in the cytoplasm of the cell, whereas in eukaryotes transcription occurs in the nucleus and translation occurs in the cytoplasm.
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water quality specialist in South Dakota notices local streams in a region have high salinity levels. The inland streams are not connected to any wetland, only a local watershed from a mountain region. Map of the Midwest United States of America. From the top left, the state of North Dakota, South Dakota below it, Nebraska below that, and Kansas below Nebraska. From the top center, Minnesota, Iowa is below it, and Missouri is below Iowa. From the top right, Michigan, Wisconsin below it, and Illinois is below Wisconsin. Next to Illinois, below Lake Michigan, is Indiana. Next to Indiana, and below Lake Erie, is Ohio.. Which of the following is a possible source of the extra salt in the stream? Ocean upstream Lake downstream Nearby fracking Pump jack drills
Answers
A possible source of additional salt in the stream is the influence of the ocean upstream.
The map shows the course of the Mississippi River through the states of Minnesota, Wisconsin, Iowa, Illinois, and Missouri and its mouth in the Ocean.
According to this information, the salinity detected in South Dakota of the Mississippi River can be caused by the influence of the salty water of the Ocean against the current of the river.
Note: This question is incomplete because the map is missing. Here is the map.
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Answer: C. Nearby Franking
Explanation: Someone in the comments was helpful enough to say it but couldn't post it so yea, just passing it on but its right so thanks to them
What causes a substance’s identity to change during a chemical change?
Answers
(Sorry if this didn’t help)
Can somebody please help me on this I just got this brainly app and I really want to give more points if you help me But this is as much as I have (BTW THIS IS SCIENCE)
Answers
Answer:
the answer would be (c)
Explanation:
hope this helps
sensory information from all parts of the body is routed to
Answers
Answer:
the Somatosensory Cortex.
Explanation:
im not sure that is just the anwser.
which of these neurotransmitters does not bind to a plasma membrane receptor?
Answers
a
A balance is best used to measure a sample's
volume
b. length
C. mass
d. size
Answers
Answer:
size
Explanation:
Which organelle produces the energy a cell needs to carry out its functions? Powerhouse
A. Mitochondria
B. Nucleus
C. Golgi complex
D. Endoplasmic Reticulum
Answers
Think about how you obtain the energy you need to do everyday activities like doing chores, going to school, or playing sports. Write about it in the box below.
Answers
Answer:
I get energy by sleeping at night and eating at least 3 meals a day everyday.
Explanation:
why should you lower the stage all the way down after using a microscope?
Answers
Answer:
Reducing the amount of light improves contrast, making the specimen "stand out" against the background. Some microscopes have an annular condenser, which is a plate under the stage that can be rotated. The plate consists of holes of different diameter.
Explanation:
what was life like for the native americans after they were relocated west to indian territory
Answers
hmmm what is it mhmhmhmm
A(n) _____ is a type of cancer-causing gene that promotes cancer by activating cell division at an inappropriate time or place.
Answers
How can scientists use half-life to help date new rocks and fossils that are found?
Answers
Answer:
radioactive isotopes of elements decay
Explanation:
As radioactive isotopes of elements decay, they lose their radioactivity and become a brand new element known as a daughter isotope. ... The half-lives of several radioactive isotopes are known and are used often to figure out the age of newly found fossils.
a person's physical and sexual development is controlled by the
A. nervous system
B. endocrine system
C. Circulatory system
D. Muscular system
E. Other
Answers
Answer:
E
Explanation:
The main functional difference between the autonomic nervous system and the somatic nervous system is that the activities of the ANS __________.
Answers
Answer:
The somatic nervous system (SNS) deals with sensory input and voluntary motor (efferent) activities, while the autonomic nervous system (ANS) deals only with efferent (motor) signals from the CNS to control activities in the body that are distinct from those under conscious voluntary control.
Explanation: