Answer:
Explanation:
This question appears incomplete. However, one of the main differences (in organelles) between plants and animal cells is the absence of cell wall and chloroplast in animal cells while both organelles are present in plant cells. The cell wall is outside of the cell membrane. The cell wall provides rigidity and support to the plant cell while the chloroplast is the cellular "machinery" for photosynthesis. The chloroplast contains the green pigment called chlorophyll which provides green plants with there colour and assist the plants in absorbing/capturing of sunlight/energy for the purpose of photosynthesis (self production of food by green plants).
explain why the Antarctic circumpolar current is the only surface current that circles the entire globe
Answer: The current is circumpolar due to the lack of any landmass connecting with Antarctica and this keeps warm ocean waters away from Antarctica, enabling that continent to maintain its huge ice sheet.
Explanation:
Answer:
There are no landmasses to block the Antarctic Circumpolar Current.
Explanation:
The percentage of total blood volume occupied by erythrocytes is called the _______ that for women has a normal range of _______. A.
Answer: the percentage of total blood volume occupied by erythrocytes. In males =47% +/-5%; females = 42%, +/-5%. About 45% of total blood volume. cytoplasmic fragments of large cells called megakaryocytes.
Explanation:
The percentage of total blood volume occupied by erythrocytes is called the hematocrit
For women have a normal range of 40±5%.
What is blood?
Blood is circulated around the body through blood vessels called arteries and veins.males have about 5 to 5.5 liters of blood.females have about 4 to 4.5 liter of blood.About 55% of blood is blood plasma.erythrocytes are about 4.7 to 6.1 million (male), and 4.2 to 5.4 million (female) blood supplies oxygen to the entire body.Plasma without clotting factor is called serum.The solid part of our blood contains red blood cells (RBC), white blood cells (WBC), and platelets.
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Is a scar an inherited or an environmental change?
Answer:
a scar is a environmental change
Answer:
environmental change
Explanation:
Explain
A) Photosynthesis is responsible for providing the oxygen needed for all life forms on Earth.
B) Carbon dioxide and oxygen are exchanged by organisms through these two processes: photosynthesis and cellular respiration.
C) Cellular respiration, through the breakdown of glucose, supplies the oxygen needed for aerobic metabolism by most organisms on Earth.
D) Photosynthesis is responsible for the transformation of solar energy into usable chemical energy, glucose, used by most organisms on Earth
Answer:
The answer is D
Explanation:
I just took the test
Wind is caused by the heating and cooling of Earth.
True or false
Answer:
true
Explanation:
Wind is the movement of air caused by the uneven heating of the Earth by the sun.
Hope this helps!
Answer: true
Explanation:
When a cold air mass collides with a warm air mass and lifts the warm air out of its way, there is _______.The rising warm air causes water vapor to condense and clouds to form.
A )cold front
B ) A hot and cold front
C ) hot front
D ) None of the above
Answer:
c
Explanation:
Which process creates most of the cells in our body?
Answer:
Regeneration, Mitosis, and Meiosis.
These 3 processes involve cells dividing to make new daughter cells that repeat the process. However, regeneration only occurs when our systems are damaged and need repair by cells.
Hope this helps!
Answer:
Mitosis
Explanation:
When people say "cell division," they usually mean mitosis, the process of creating new body cells. Meiosis is the cell division process that results in the formation of egg and sperm cells. Mitosis is a necessary part of existence. 26th of March, 2021
A certain drug decreases heart rate by producing depolarization in the pacemaker cells of the heart. This drug probably binds to ___________________.
This drug probably binds to the funny channel in the heart.
What is Funny channel (If)?This is a current found in the heart which possess effects which are opposite to those of most other heart currents.
It has a mixed Na+–K+ inward current activated by hyperpolarization which makes it easier for the drug to produce depolarization thereby decreasing heart rate.
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If decomposers were removed
from an ecosystem, which of the
scenarios below would occur?
A. The number of plant species would increase
due to the increased space available.
B. The number of animals would decrease due to
the lack of plant life.
C. The ecosystem would collapse due to the lack
of nitrogen and carbon available to producers.
Answer:
Its either B or C but I would go with C
Explanation:
If decomposers were removed from an ecosystem the ecosystem would collapse due to the lack of nitrogen and carbon available to producers.
What are decomposers?" Decomposers are organisms, especially a soil bacterium, fungus, or invertebrate, that decomposes organic material."
Why are decomposers important for the ecosystem?Decomposers play a critical role in the flow of energy through an ecosystem:
They break apart dead organisms into simpler inorganic materials, making nutrients available to primary producers.Decomposer bacteria are responsible for fixing nitrogen in the soil, meaning they transform nitrogen into a form that can be used by other organisms in the food chain.Decomposition is also important because it is part of the global carbon cycle. The carbon cycle is the cyclical movement of carbon atoms from the atmosphere to the biosphere/lithosphere and back to the atmosphere.What is an ecosystem?"An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life."
What is a producer?"Producers are autotrophs, or organisms that produce their own food. Plants and algae are examples of producers."
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Kangaroos conserve energy as they move __________.
A)
by using their front paws to help them run
B)
by using a tailwind to push them forward
C)
by using their hind legs like springs
D)
by running only at night
C
The spring-like tendons in their hind legs store energy for leaps, kangaroos use less energy hopping than a horse use in running. Kangaroos tend to move in a leisurely fashion using all four feet plus its hefty tail for balance.
Answer:
Letter C, by using their hind legs like springs
Explanation:
Got it right on edge :)
Why are there no plants in the aphotic
zone?
A. There is not enough free space to accommodate a
plant colony.
B. There are too many predators, so plants can't survive
long enough to reproduce.
C. There is not enough light for plants to undergo
photosynthesis.
D. There is too much traffic, and plants get trampled
before they can put down roots.
Answer:
C, there is not enough light
Explanation:
Let's look at the word "aphotic". It can be broken into two parts, "a" and "photic". "a" means "not" and "photic" means "light". So, together, they mean "not light". Even if we knew nothing about marine life, we could answer this!
Answer:c
Explanation:
Several models of atoms are mentioned in this lesson. Plum pudding, planetary and quantum mechanical. Which reason below explains why there are different atom models?
Because atoms have changed their structure over time
Because there are different types of atoms
Because the ideas about the models changed as more discoveries were made about the atom
Because many people came up with models at the same time
Answer:
Because the ideas about the models changed as more discoveries were made about the atom
Explanation:
The structure of the atom was not always known and it took many discoveries to fully figure it out. Through these discoveries, many models were proven invalid; though they still helped in the long run by providing a basic idea on the basis of an atom.
Remember, models are able to change over time, they are merely theories after all; and scientific theories change, unlike laws.
Which word best describes the rock’s grain shape? jagged oval round smooth.
The word that best describes the rock's grain shape is jagged.
What do you mean by the Rock's grain shape?
It significantly defines the structural arrangement of a granular mass within a rock.
In some rocks, the grain shape results from the shapes of crystals that form the rock. While in some other rocks, the grain shape results from the fragments of other rocks that can be considered as round, smooth, and sometimes jagged.
Therefore, the word that best describes the rock's grain shape is jagged.
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Answer: A
Explanation i just took the test
A situation in which an offspring clearly expresses both phenotypes of the parents is known as
Answer:
Codominance
Explanation:
With codominance, a cross between organisms with two different phenotypes produces offspring with a third phenotype in which both of the parental traits appear together.
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How does pioneers affect the variety of organisms in an ecosystem?
What is true about enzymes?
Answer:
Enzymes are proteins and they act as a catalyst
Explanation:
They bind to subtrates and turn them into products.
Are the chemical messengers in the endocrine system that target
cells through the bloodstream
Answer:
Hormones
Explanation:
Hormones are chemical messengers in the endocrine system, and they are secreted by many types of glands, such as the pituitary gland and the thyroid gland, as well as target cells through the bloodstream, and are released into the bloodstream by endocrine glands.
what is the two different between vacuole and nucleus of a cell
Answer:
It is spherical in shape and directs and command all the function of the cell, Found only in eukaryotes
Explanation:
vacuole are fluid filled membrane bound space .there are many small vacuoles in plant cell and one large vacuole in animal cell
Answer:
vacuole stores nutrients. Nucleus control the parts of the cells
Explanation:
vacuole stores nutrients for later use, so that the cell is free from contamination.
Nucleus is the largest organelle inside the cell. It is the leader or brain who controls and commands the other organelles what to do.
Describe the structure of DNA and the possible base pairs it contains.
DNA is a molecule made up of thousands of atoms and is very long and thin. It is made up of two twisted chains or "backbones." A double helix is the term for this structure. It would appear like a ladder if you could straighten a DNA molecule out. The ladder's "rungs" are built up of two smaller molecules called bases.
adenine (A) and thymine (T) join together = A-T
guanine (G) and cytosine (C) join together = G–C
DNA is a molecule with a double helix structure. This means that it is shaped like a twisted ladder. The backbone of the molecule is made up of two long chains that spiral around each other. The struts of the ladder are base pairs, which are made up of two bases joined together.
There are four bases: adenine (A), cytosine (C), guanine (G) and thymine (T). These can only join together to form two possible base pairs: adenine–thymine or cytosine–guanine.
Which is the correct order of events for hormones activating gs proteins?.
Answer:
activation of G protein, binding of GTP, activation of adenylate cyclase, conversion of ATP to cAMP
Explanation:
If you are digging in a 20-million-year-old fossil site in eastern Africa, which primate are you most likely to come across
Answer:
Proconsul
Explanation:
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____ is when water flows through cities or across fields picking up dirt and pollutants, eventually dumping it into a larger body of water and decreasing water quality.
Erosion
Sedimentation
Runoff
Infiltration
(PLEASE HELP IT IS DUE TODAY)
1. Which statement best describes stem cells?
A. Stem cells are commonly found in the brain of adults.
B. Stem cells are flowing through our veins delivering oxygen to the other cells of your
body.
C. Stem cells are only found in prokaryotes.
D. Stem cells are unspecialized cells that have the potential to differentiate into a wide
variety of cell types.
Answer:
It might be A
Explanation:
It might be A because stem cells are usually found in brain, blood, bone marrow, muscle, skin, heart, and liver tissues.
Answer:
the answer to that one is D
6. What is the main source of energy in photosynthesis?
a. carbon dioxide
b. light c. glucose
d. oxygen
Answer:
B. Light
Explanation:
Photosynthesis uses the thermal energy from sunlight to react with carbon dioxide and oxygen, producing glucose.
Answer:
light
Explanation:
the main source of energy is light because light brings energy to the thylakoid membrane in the chlorophyll which causes electrons from the photolysis of water to get excited.
Identify the two sources of pressure acting on an object at a depth of 10m.
tbh i knew this answer but forgot
Explanation:
What part of the brain controls artistic and mathematical abilities? A. Cerebrum B. Cerebellum C. Brain stem
The brain has main functions but the part of the brain that controls artistic and mathematical abilities is the Cerebrum's
What is the function of the Cerebrum?Generally, the Cerebrum resides in the left hemisphere which is in charge of controlling speech, arithmetic, and writing.
In conclusion, The Cerebrum's the largest part of the brain, the cerebrum's main function is to create and harmonize motion, some other functions of the cerebrum are to facilitate speech reasoning, feelings, and understanding.
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Tay sachs disease is caused by a mutation in the hexa gene. There are a number of mutations that are known to cause the symptoms of tay sachs. What kind of mutation is presented in this interactive?.
Tay Sachs disease is caused by a type mutation called frameshift mutation. It alters all protein sequence downstream of the mutation site.
What is a mutation?A mutation is any alteration in the genetic material (DNA) of the genome of a particular organism.
A frameshift mutation is a type of mutation capable of changing all the Open Reading Frame (ORF) of a protein, thereby altering its functional and structural properties.
Tay Sachs disease is caused by a frameshift mutation in the HEXA gene located on chromosome 15, which leads to a defective protein and faulty cellular transport of beta-hexosaminidase.
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Which best describes how mRNA is produced in a cell?
A. mRNA is made by duplicating RNA found in the nucleus.
O B. mRNA is made by DNA, using RNA nucleotides as a template.
C. mRNA is made by lining up RNA nucleotides, using DNA as a
template
D. mRNA is made by breaking apart DNA and reusing the pieces.
Answer:
B
Explanation:
mRNA is synthesized in the nucleus using the nucleotide sequence of DNA as a template.
Type the correct answer in the box. Spell all words correctly.
Which term completes the sentence given below?
Proponents of animal
are strictly against the use of animals,
Reset
Next
Answer:
i think its welfare i'm sorry if i get it wrong
Explanation:
Answer:
modest
Explanation:
some unicellular organism develop cyst why
Answer:
Cysts develop when the cell mutates unexpectedly. This is a bit rare to happen in a unicellular organism, because they only have one cell. Unfortunately, this is more common for us because we have roughly 39 billion cells.
I hope this answers your question!