Answers
Definitions:
Atomic Mass- mass of an atom. The atomic mass is approximately equal to total number of protons and neutrons.
Atomic number- Number of protons in the nucleus of an atom.
Element- a pure substance that can't be broken down by chemical means.
Table:
Hydrogen/1.008/1/1
Strontium/87.62/38/38
Palladium/106.42/46/46
Fluorine/18.998403163/9/9
Related Questions
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
Answers
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.
How does pioneers affect the variety of organisms in an ecosystem?
Answers
Describe the structure of DNA and the possible base pairs it contains.
Answers
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.
what is the two different between vacuole and nucleus of a cell
Answers
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.
The percentage of total blood volume occupied by erythrocytes is called the _______ that for women has a normal range of _______. A.
Answers
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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6. What is the main source of energy in photosynthesis?
a. carbon dioxide
b. light c. glucose
d. oxygen
Answers
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.
Wind is caused by the heating and cooling of Earth.
True or false
Answers
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:
Describe the interaction between the corn, water, soil, and air in the image. How does energy flow?
Answers
The food chain and food web serve as conduits for the energy flow. Plants, who are the primary energy producers in an ecosystem.
What is the mechanism of energy flow in an ecosystem?The autotrophs that absorb energy from the sun are an excellent example of how energy moves through an ecosystem.
Utilize their chloroplasts to accumulate sunlight, which is then partially altered into chemical energy during photosynthesis.
Herbivores eat the autotrophs thereafter, converting the plant's energy into fuel for themselves. Then, carnivores consume the herbivores, followed by other carnivores consuming the carnivores.
Therefore, energy flow in an ecosystem is connected by different trophic level.
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Is a scar an inherited or an environmental change?
Answers
Answer:
a scar is a environmental change
Answer:
environmental change
Explanation:
Describe where in the cell starch grains are found.
Answers
Featured snippet from the web
In some plants, starch is stored in cell organelles called amyloplasts. Some plant roots and embryos, in the form of seeds and fruit, also serve as storage units for starch. Cells in plant leaves produce starch in the presence of sunlight.
A situation in which an offspring clearly expresses both phenotypes of the parents is known as
Answers
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.
Please mark me the brainliest!?!
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
Answers
Answer:
i think its welfare i'm sorry if i get it wrong
Explanation:
Answer:
modest
Explanation:
Are the chemical messengers in the endocrine system that target
cells through the bloodstream
Answers
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.
Which statement would best explain why the carbon cycle is often referred to as the carbon oxygen cycle
Answers
Answer: A Plants take in oxygen and combine it with carbon and hydrogen to make carbohydrates.
Explanation:
What are convection currents
Answers
Answer:
Convection is the transfer of heat due to the bulk movement of molecules within fluids, including molten rock.
Explanation:
Convection currents transfer heat from one place to another by mass motion of a fluid such as water, air or molten rock. The heat transfer function of convection currents drives the earth’s ocean currents, atmospheric weather and geology. Convection is different from conduction, which is a transfer of heat between substances in direct contact with each other.
the organelle that sort and ship the proteins produced in the cell may stop this organelle was namd after an Italian physician
Answers
Answer:
The Golgi
Explanation:
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?.
Answers
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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A certain drug decreases heart rate by producing depolarization in the pacemaker cells of the heart. This drug probably binds to ___________________.
Answers
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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explain why the Antarctic circumpolar current is the only surface current that circles the entire globe
Answers
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:
Which process creates most of the cells in our body?
Answers
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
What is true about enzymes?
Answers
Answer:
Enzymes are proteins and they act as a catalyst
Explanation:
They bind to subtrates and turn them into products.
____ 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
Answers
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
Answers
Answer:
c
Explanation:
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
Answers
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 :)
Identify the two sources of pressure acting on an object at a depth of 10m.
Answers
tbh i knew this answer but forgot
Explanation:
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.
Answers
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:
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.
Answers
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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If you are digging in a 20-million-year-old fossil site in eastern Africa, which primate are you most likely to come across
Answers
Answer:
Proconsul
Explanation:
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QUESTION PROKARYOTES EUKARYOTES VIRUSES Does it have a nucleus? Does it have membrane-bound organelles? Does it have a cell membrane? Does it have DNA? Is it small, smallest or biggest in size of the three? Imagine in the future that you are an astrobiologist (astrobiologists are scientists who look for life in space) on a mission to another planet. You have discovered something that may or may not be alive, may or may not be prokaryotic or eukaryotic. What information could you gather and analyze about its structure to determine the answer? How can you justify (support) your answer?
Answers
Answer:
the prokaryotic virus does not have a nucleus (????) but I do think it has a membrane bound organelle. cant answer the rest. Hope this helps!!!
Explanation:
I did it in biology but the teacher was a bit of a bad teacher.
What part of the brain controls artistic and mathematical abilities? A. Cerebrum B. Cerebellum C. Brain stem
Answers
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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