Answer:Chick Embryo Development. A chick emerges from a fertile egg after twenty-one days of incubation. The germinal disc is visible on the surface of the yolk. The development of the chick begins in the single cell formed by the union of two parental cells, egg and sperm, in the process known as fertilization.
Explanation:
Which factors are responsible for high and low tides?
O A. Cold and warm ocean currents
OB. The moon's gravity and Earth's rotation
O C. The ocean's conveyor belt and refraction
O D. Earthquakes and volcanoes
Answer:
B the moons gravity and earths rotation
pleasee helpppp Which type of rock forms as a result of cooling and crystallization?
igneous
metamorphic
clastic
sedimentary
How many atoms in all are in a molecule of serotonin?
Answer:
10 carbon (black), 12 hydrogen atoms (white), 2 nitrogen atoms (blue), 1 oxygen atom (red)
Explanation: Serotonin is a molecole composed of all of these atoms
A molecule of serotonin has 25 atoms in total, and these atoms are arranged in a specific pattern to give serotonin its unique chemical and biological properties.
What is serotonin?Serotonin is a neurotransmitter, which means it is a chemical that is used by the nervous system to transmit signals between nerve cells. It is also a hormone that regulates various physiological processes in the body. The chemical formula for serotonin is [tex]C_1_0H_1_2N_2O,[/tex] which indicates that it contains 10 carbon atoms, 12 hydrogen atoms, 2 nitrogen atoms, and 1 oxygen atom. The molecule of serotonin consists of a benzene ring with two substituents: an amino group and a hydroxyl group (-OH). The amino group and hydroxyl group are attached to adjacent carbon atoms in the benzene ring, and the nitrogen atom is attached to one of the carbon atoms in the amino group.
Hence, a molecule of serotonin has 25 atoms in total, and these atoms are arranged in a specific pattern to give serotonin its unique chemical and biological properties.
Learn more about serotonin here.
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Which of the following is NOT true about viruses?
A. Viruses have a protein coat.
B. Viruses have their own genetic material.
c. Viruses can reproduce on their own.
D. Viruses are classified by shape.
Answer:
C.
Explanation:
Viruses are classified by shapes. Lots of viruses are being created each day, and we have to name it by shape (just look up how the virus from China adopted its name). Viruses have coats of DNA to help it overgo the most extreme tempuratures. Viruses have to reproduce on a shape or surface to find a host. Viruses have to have a genetic material so the virus can evole and adapt to the most harshest of areas.
Viruses are defined as microscopic infectious agent, which requires a host to replicate. The viruses have genetic material, a protein coat, and are classified based on the phenotypic characters.
The option that is not correct about the virus is:
Option C. Viruses can reproduce on their own.
Viruses are microscopic entity that requires the host to replicate and reproduce. Some of the features of viruses are:
Viruses have a protein coat, which is known as a capsid. Capsid protects the genetic material of the virus. The genetic material of the virus can be DNA or RNA. The viruses incorporate their genetic material into the host cell to replicate and reproduce. The viruses are classified based on phenotypic characters such as genetic material, mode of replication, morphology, and disease-causing.
Therefore, option C is not true about viruses.
To know more about viruses, refer to the following link:
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which member of the food chain has the most sunlight energy available to it
Answer:
The answer is the first trophic level.
Explanation:
This level contains the producers, which are all of the photosynthetic organisms.
What happens to the energy that is stored in cells? Check all that apply.
It is released slowly.
It is released quickly.
It is released in a single reaction.
It is released in a series of reactions.
It is used by cells for repair and growth.
Answer:
It is released slowly
It is released in a series of reactions
It is used by cells for repair and growth
Explanation:
please give brainliest
Which scientist is known for contributions to a scientific discipline that is different from that of the other three scientists?
Archimedes
Galen
Harvey
Vesalius
Acrhimedes IS YOUR ANWSERRRRRRRRRRR
Answer:
Archimedes
Explanation:
Just took the test
could someone please help me out on this? im confused
Answer:
Dependent: Reduction
Independent: Solar Energy
Controlled: B
Explanation:
The dependent variable is what is being measured in the lab.
The independent variable is what is being CHANGED by the individual
The control is what is kept the SAME throughout the lab.
Hope this helped!
Which two of the DNA base pairs are the larger type, known as purines?
Adenine and Cytosine
Cytosine and Thymine
Adenine and Guanine
Thymine and Guanine
Answer: Adenine and Guanine are purines.
Explanation:
Purines are larger than pyrimidines because they have a two-ring structure while pyrimidines only have a single ring.
NEED HELP ASAP
Which of the following plants is not found in the tundra?
a. caribou moss
b. lousewort
C. bearberry
d. ocotillo
Please select the best answer from the choices provided
Answer:
D
Explanation:
Answer:
The answer is d i just took the test
Explanation:
31.
The chemical equation below represents a chemical process.
C6H12O6 + 602 6H2O + 6CO2 + ATP
What chemical process is represented by the equation?
A. This process occurs in anaerobic respiration.
B. The process is oxidation in which plants obtain energy.
C. The process is photosynthesis in which plants obtain food and energy in the form of ATP.
D. The process is cellular respiration which chemical energy from food sources is released in
the form of ATP.
Answer:
D
Explanation: D. The process is cellular respiration which chemical energy from food sources is released in
the form of ATP.
What is the function of the cell membrane in a cell?
A.Protect the cell from its environment
B.Allow nutrients to enter the cell
C.Allow waste to exit the cell
D.All of the above
Answer:All of the above
Explanation: Reason being is because the cell membrane protects the cell, that's what is really important about it's function. But all of the following is true too.
Many people try to eliminate fat from their diets. Which is one reason it is
necessary for humans to eat fat?
Answer:
the internal organs of the body is cushioned by fat. fat is adipose tissue stored in the body. fat is as important as such other micro molecules such as protein carbohydrates. they serve the body in many ways out of those one of the important function is protection of internal organs.
Why does each human have two sets of 23 chromosomes? Where do those chromosome sets come from? How would your chromosomes compare to someone else’s chromosomes?
Answer:
This is because our chromosomes exist in matching pairs – with one chromosome of each pair being inherited from each biological parent. Every cell in the human body contains 23 pairs of such chromosomes; our diploid number is therefore 46, our 'haploid' number 23.
Explanation:
Humans have 23 pairs of chromosomes because 23 chromosomes come from the father and the other 23 come from the mother, and thus humans end up with 46 chromosomes. With 23 sets, you have two copies of each gene. This is what happens in normal situations. However, in some cases during cell division, there could be more or less that 46 chromosomes.
One set of 23 chromosomes is inherited from the biological mother (from the egg), and the other set is inherited from the biological father (from the sperm). Of the 23 pairs of chromosomes, the first 22 pairs are called "autosomes." The final pair is called the "sex chromosomes."
In a normal diploid cell, there are 24 *different* chromosomes out the total of 46: there are 22 pairs of identical autosomes and 2 non-identical sex chromosomes.
Hope this helps!
Many processes occur in the digestive system .which process is best classified as a physical change
Answer:
This question lacks options, the options are:
A) Saliva converting the starch molecules in crackers into simple sugars
B) Digestive enzymes breaking down proteins into smaller fragments
C) bacteria converting lactose into simple sugars in the intestines
D) teeth grinding an almond into smaller pieces in the mouth
The answer is D
Explanation:
A physical change is a change that occurs to a substance without altering its chemical composition. A physical change involved a change in the substance's shape, texture, color, state etc. but not the chemical content of such substances.
In this question involving the processes that occur in digestion, a typical example of physical change is "teeth grinding an almond into smaller pieces in the mouth" because the teeth only changes the shape and texture of the almond. It does not affect the chemical composition of the almond fruit. This is also called mechanical digestion.
Note that, other options involving digestive enzymes breakdown are chemical changes because the enzymes breakdown the chemical components of each substance.
Answer: D
Explanation: because you are breaking down food in a physical change
How was the process used to construct the tree of life by Carl Woese different from the process used by Jill Banfield?
Answer and Explanation:
Carl Woese used ribosomal RNA genes to study the evolution of living beings. He used these genes because they are present in all organisms, and they all have the same function. The nucleotide sequences change very little, giving a real evolutive vision. Woese compared ribosomal genes among different living beings. The sharper the sequence variation is among two organisms, the bigger the evolutive divergence is. This divergence drowned in a phylogenetic tree shows three well-differentiated domains: Archea, Bacteria, and Eukarya. Jillian Banfield used genes from 16 ribosomal proteins from many different unknown microorganism species. She and her team used metagenomic methods that are the simultaneous analysis of multiple genomes belonging to many organisms in the same sample. These methods allowed detecting different organisms, even when these were neither previously observed nor lab-cultivated. The comparison among these new genomes with many others already known made a place for the construction of a new and more detailed tree of life where many new branches emerged from the three domains.Suppose a scientist must choose whether to publish a report in a newspaper or in a peer-reviewed journal. What is a benefit of publishing in the journal?
Answer/Explanation:
Because the journal is peer-reviewed, it means their report is assessed and critiqued by experts in the field. This means the data is more reliable and more likely to be trusted by other scientists in the field.
Additionally, the journal is likely to be specialized and used to accepting scientific reports, meaning they will have certain regulations and criteria for publishing.
How many moles are present when there are 6.02 x 10e23 atoms?
Answer:
1 mole
Explanation:
A mole is 6.022*10^23 units
Relationships of selected organisms based on a catalase structure which of the following student claima is best supported by the data provided
I need to know what the organisms are first..
5 points
Transmembrane proteins span the width of the cell membranes. Four types of transmembrane proteins are shown in a section of cell membrane.
groene
Although these proteins have different specific functions, they all-
A-stop chemical reactions within the cell
B-synthesize molecules that signal other cells
C- help the cell interact with its external environment
D- remove large waste particles from the cytoplasm of the cell
Answer:
C. help the cell interact with its external environment
Explanation:
A transmembrane protein (TP) is a type of integral membrane protein that spans the entirety of the cell membrane. Many transmembrane proteins function as gateways to permit the transport of specific substances across the membrane.
Although transmembrane proteins have different specific functions, they always HELP the cell interact with its external environment.
Transmembrane proteins are a broad category of membrane proteins that act as carriers and/or transporters in order to allow the movement of specific substances across cell membranes.
After binding to their specific ligands, the three-dimensional (3D) shape of transmembrane proteins changes in order to allow the movement of molecules and ions through the cell membrane.
For example, aquaporins are a type of transmembrane protein that regulates the entry of water (H2O) molecules into and out of cells.
In conclusion, although transmembrane proteins have different specific functions, they always HELP the cell interact with its external environment.
Learn more in:
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o Which of the these items contains carbon?
WARM UP
Answer:
All of them I guess
No doubt
Answer:
All of them
Explanation:
Which of the following working hazard categories qualifies as an environmental hazard?
heat exposure
slips and falls
unclean conditions
equipment/machinery
Answer:
The above answer is correct
Explanation:
Edg 2020-2021
A simplified model of a bacterial cell is shown here. Upon analysis of the internal structures of this cell, predict which organelle would be found. Choose all that apply
Answer: DNA and ribosomes
Explanation:
DNA is the genetic material of the cell and it is found In all living cells. Ribosomes are small, non-membrane bound organelle that is found in ALL cells and cell types.
Are there any mammalian cells that would be a good source for dividing cells? What types of cells would most like NOT have cells undergoing division?
Answer:
Skin cells, bone cells
Explanation:
1. Skin cells are constantly being replaced, so it's likely they will be undergoing Mitosis.
2. Bones grow very slowly, and can last for years, which means that it's unlikely they will be undergoing mitosis.
There are a couple of mammalian cells that would be a good source for dividing cells. They include but not limited to:
The cells of the skinCells in the bone marrowThe cells of the skin adjacent to the environment are constantly being replaced by cell division due to death relating to environmental factors.
The cells in the bone marrow are also dividing constantly because old blood cells are constantly being replaced.
Some cells in the human body do not divide ordinarily, unless they are called upon to do so on special circumstances. For example, the cells of the heart stop dividing once the heart gets to a particular size. The cells enter the quiescent stage of the cell cycle and they are only called upon to divide in case an injury occur to the heart and it needs to repair itself.
More on cell division can be found here: https://brainly.com/question/24276929
What type of wave moves the audio and visual signals?
1. electromagnetic wave
2. transmitter wave
3. carrier wave
4. image wave
Answer:
1. ( electromagnetic wave)
Answer:
Sanic
Explanation:
carrier wave test i took
As the human population increases, which challenge will most likely be addressed through biology?
○ mining more mineral resources
○ increasing food production
○ manufacturing new types of synthetic clothing
○ preserving large numbers of historical documents
What are the best keyboard switches?
I'm building a mechanical keyboard and what switches should I order?
Answer:
go ask this on reddit not brainly
Explanation:
4. Why must the process of meiosis create only half the number of
chromosomes (23) in each new cell? *
A. The cells are smaller.
B. Egg and sperm cells must only have the number of chromosomes so that when
they combine the number will equal 46.
C. 72 the number of chromosomes are not produced in this process, 46, the total
number is produced.
D. If not, the cell would die.
Answer:
I think it's B.
Explanation:
hope this helps
Answer:
B. Egg and sperm cells must only have the number of chromosomes so that when they combine the number will equal 46.
Explanation:
The purpose of meiosis is to shuffle genetic information and cut the cellular chromosome number in half, from 46 chromosomes to 23 chromosomes. In this way, when an egg and sperm cell combine during fertilization, the resulting embryo will inherit the appropriate amount of unique genetic information from each parent.
Hope this helps!!
The speed at which waves approach the shore depends on the shoreline features and the depth of the sea floor. When a wave reaches the shore, it releases a burst of energy that generates a current which runs parallel to the shoreline. What is this current called?
Answer:
Longshore current.
Explanation:
A wave is a disturbance which travels through a material medium without any permanent displacement of the particles of the medium. During the propagation of a wave, energy is transmitted from one point to another since waves flow with energy. The higher its speed of propagation, the higher the energy of the wave.
The energy released by the wave at shore produces a current which is referred to as a longshore current.
Answer:
It would be Longshore Current
Explanation:
Hope it helps :)
Write down the names of various endocrine glands with their secretion and function.
plz say me the answer fast
I will mark as brainliest
Answer:
pituitary gland-growth hormone
thyroid gland- thyroxine
adrenal gland- adrenalin
pancrease- insulin
ovary-estrogen
testis-testosterone
Explanation:
