Answer:
After the hadeon
Explanation:
The Cyanobacteria start producing pure oxygen after the Hadean eon. The correct option is B.
What is Cyanobacteria?Cyanobacteria, also known as Cyanophyta, are a phylum of microscopic organisms and plastids that obtain their energy from photosynthesis.
They are the primary photosynthetic prokaryotes capable of delivering oxygen.
The name cyanobacteria refers to the color of the microorganisms. After the Hadean eon, cyanobacteria began producing pure oxygen.
Toxins produced by cyanobacteria can affect various parts of the body. Different cyanobacteria species can produce toxins that harm the liver, affect the central nervous system (neurotoxins), and produce toxic alkaloids that harm the kidneys and gastrointestinal tract.
High levels of blue-green algae and their toxins can cause diarrhea, nausea, and vomiting, as well as skin, eye, and throat irritation, allergic reactions, and breathing difficulties.
Thus, the correct option is B.
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Your question seems incomplete, the missing options are:
A. During the Hadean eon
B. After the Hadean eon
C. During the Phanerozoic eon
D. After the Proterozoic eon
paracrime signsling is different from other types of signaling in that the signaling molecule
Answer:
Paracrine signaling is different from other types of signaling in that the signaling molecule that is secreted from one cell binds to the receptor of the adjacent cell.
Explanation:
Paracrine signaling occur between two adjacent cells.During paracrine signaling the signaling molecule or ligand is released from one cell and the released signaling molecule binds the the surface receptor of the adjacent cell.
For example transmission of nerve impulse between two neurons through synapse.
Are all organisms with similar physical characteristics related to one another? If not, why?
Answer:
Yes, all organisms with similar physical characteristics are related to one another.
Explanation:
Species that have common characteristics are closely related. They can even interbreed with one another. The ones with similar physical characteristics tend to be closer than others. Species may share same physical characteristics because they had common ancestors.
Scientists make a comparison of the DNA of the organisms and find that species with same DNA are related to each other. Two similar organisms may also evolve with time to adapt to their surroundings. There would be different reasons for their evolution. In a nutshell, they are closely related contributing to the ecosystem.
Answer: Yes all organisms with similar physical characteristics related to one another
Explanation: Common ancestor
The modern model of the atom describes electrons in a little less specific detail than earlier models did. Why is it that being less sure about the placement of electrons in an atom is actually an improvement over earlier models?
The modern model of atom is unable to show the speed of atoms which make it less sure about its improved version.
Explanation:
The atomic model has under-went a drastic change in the past few decades. The first model was developed by Demoncritus in 450 B.C. which was accurate about the existence of atom as matter particles but he was inaccurate about the divisibility of matters.
Many other scientists have developed various models of atom over time, they are- John Dalton(1800), J.J. Thompson(1897), Ernest Rutherford( 1899), Neils Bohr. Neils Borh talked about the nucleus in his model and about the electrons orbiting the nucleus. However, this modern model lacked the observation of the speed of electrons.
Answer:
The modern model of atom is unable to show the speed of atoms which make it less sure about its improved version.
Explanation:
what happens to the particles when you put a metal spoon into a pot of boiling water.
Place the following words into the illustration below: Gametes, sporophyte, gametophyte, and zygote. Explain each step (arrow) in the cycle, and how the terms are related.
Answer:
1. gametophyte
2. gamete
3. zygote
4. sporophyte
Explanation:
The life cycle of ferns has two systems for reproduction. Each system is known as one generation. The life cycle of ferns is an alteration of these generations.
1. sporophyte generation (release spores - diploid )
2. gametophyte generation (release gametes - haploid)
In genetics, diploid cells receive two sets of the chromosome from male and female parents. A haploid cell has only one set of chromosomes.
Spores grow on the surface of mature fern leaves. The haploid spores give rise to gametophytes. The gametophyte produces gametes within multicellular structures by the process of mitosis. The fusion of male and female gametes to form a diploid zygote under fertilization. The development of the zygote gives rise to a diploid sporophyte. Within the sporophyte, spores will be formed by meiosis.
Here Is What I put...
Which of these are an important part of a scientific process?
A. Testable hypotheses
B. Artistic drawings
C.Total agreement
D. Philosophical questions
Answer:
A.Testable hypotheses
it makes the most sense out of the rest
Testable hypotheses are an important part of a scientific process. Therefore, option (A) is correct.
What is Testable hypotheses?Testable hypotheses are a fundamental aspect of the scientific process. They serve as proposed explanations or predictions that can be empirically tested and evaluated. A testable hypothesis is formulated based on prior knowledge, observations, or existing theories and is constructed in a way that allows for experimentation or data collection to either support or refute it.
A well-formulated testable hypothesis is specific, measurable, and falsifiable, meaning it can be proven wrong if the evidence does not support it. By designing experiments or gathering data, scientists can systematically evaluate the hypothesis and draw conclusions based on the results. The process of testing hypotheses allows for the advancement of scientific knowledge, refinement of theories, and the generation of new insights.
Testable hypotheses are crucial in scientific research as they provide a framework for investigation, promote objective inquiry, and enable the accumulation of evidence-based knowledge in various fields of study.
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Which of the following is true about prokaryotic and eukaryotic cells
Answer:
am NT sure
Explanation:
by I do think that a prokaryotic cell lacks a nucleus while a eukaryotic has a nucleus
In a pedigree, a vertical line and a bracket connect _____. siblings to each other parents to their children husbands to wives
Answer:
In a pedigree, a vertical line and a bracket connect parents to their children.
Explanation:
A pedigree can be described as a diagram which depicts the lineage of a person and shows his/her ancestors in a pattern. A pedigree is very helpful in understanding any genetic disorders which occur in a family. It helps the doctor conclude that whether the parents will have the probability of having a normal child or not.
In a Pedigree, a vertical line will be drawn to show the parents and their children. A horizontal line is drawn between the parents.
Answer:
parents to their children
Explanation:
gradpoint
14-15) What are the two triggers that initiate binary fission?
Answer:
could you be more pacific
Explanation:
Binary fission in prokaryotes is triggered by DNA replication and cell growth until the parent cell reaches a certain size; then, a protein called FtsZ forms a ring to divide the cell into two identical daughter cells.
Explanation:The two triggers that initiate binary fission in prokaryotes are DNA replication and cell growth to a certain size. Initially, the bacterial DNA is replicated, leading to the formation of two genetically identical copies. As the cell elongates, it reaches a certain size that triggers the construction of a division septum at the cell center. Finally, a cytoskeletal protein called FtsZ forms a ring at the site of cell division, facilitating the separation of the two new daughter cells. This division process allows for the rapid growth of bacterial populations, making it a very efficient method of reproduction in unstable environments.
what is the basic skeletal pattern of all limbs of animals on earth?
Answer:
The common plan for all limbs: one bone, followed by two bones, then little blobs, then fingers or toes. For Owen, seeing a design in the limbs was only the beginning: when he looked at skulls and backbones, indeed when he considered the entire architecture of the body
The basic skeletal pattern of all limbs in animals on Earth follows a common structure known as the "pentadactyl limb." This term refers to a limb with five distinct segments or digits. The pentadactyl limb is a fundamental feature shared by many vertebrates, including mammals, reptiles, birds, and amphibians.
The pentadactyl limb consists of the following segments, starting from the body and extending outward:
Humerus/Femur: This is the uppermost bone, connecting the limb to the body. In the forelimbs (arms or wings), it's called the humerus, while in the hindlimbs (legs), it's called the femur.
Radius and Ulna/Tibia and Fibula: These are the bones of the lower arm (forelimb) or lower leg (hindlimb). In animals with pentadactyl limbs, there are typically two bones in this segment. The radius and ulna are found in the forelimb, while the tibia and fibula are present in the hindlimb.
Carpals/Tarsals: These are the bones of the wrist (forelimb) or ankle (hindlimb). They form a cluster of small bones that provide flexibility to the limb.
Metacarpals/Metatarsals: These are the bones of the palm (forelimb) or the sole (hindlimb). They connect the carpals/tarsals to the digits.
Digits/Phalanges: These are the individual bones of the fingers or toes. In the pentadactyl pattern, there are typically five digits, although some animals have fewer due to evolutionary adaptations.
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Substances diffuse naturally from an area of higher to lower
Explanation:
Substances diffuse naturally from an area of higher to lower concentration.
Via diffusion, small molecules can move from regions of high concentration to regions of low concentration until an equilibrium- a stable balance of solute: solvent, is reached. This occurs along the concentration gradient of the molecule, and usually involves small non-polar molecules in cells such as oxygen and carbon dioxide. In cellular transport, diffusion is also referred to as passive transport.
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Cells in a large multicellular organism communicate with each other by chemical signals. These signals are passed from one cell to another. To receive and respond to a chemical signal, a cell must have a --------------for that chemical.
Answer:
Cells in a large multicellular organism communicate with each other by chemical signals. These signals are passed from one cell to another. To receive and respond to a chemical signal, a cell must have a receptor for that chemical.
Explanation:
To generate a physiological response, all cells in the body have special proteins called receptors. These receptors are involved in detecting a chemical signal and generating a response. The receptors are specific for different kind of chemical signals. For example, a dopamine receptor will bind a dopamine molecule whereas an insulin receptor will be able to bind an insulin molecule. Apart from chemical signals, some cells might also respond to mechanical signals.
Cells in a large multicellular organism communicate with each other through chemical signaling. To receive and respond to a chemical signal, a cell must have a receptor for that chemical.
Explanation:In multicellular organisms, cells communicate with each other through chemical signaling.
Chemical signals are passed from one cell to another, allowing cells to coordinate and fine-tune their functions.
To receive and respond to a chemical signal, a cell must have a receptor for that specific chemical.
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Which of the following is forgetting for a reason, such as forgetting where you parked your
car yesterday so that you can remember where you parked it today?
Select one:
a. Decay
b. Retroactive interference
c. Dementia
d. Motivated forgetting
Answer:
The answer is Retroactive interface but Motivated forgetting is also acceptable.
Explanation:
Retroactive interference is when old information interferes with learning new information. For example, you may have trouble remembering your new telephone number because your old number interferes with it.
Forgetting may also happen through motivated forgetting or forgetting for a reason. Sometimes we intentionally forget information, such as where we parked the car yesterday so that we can remember where we parked it today. We may also forget information that we find unpleasant or that produces anxiety. For example, a person may forget a dentist appointment.
Answer:
Motivated forgetting
Explanation:
Well I took the test and if you look in section 02.06 it says it
Which of the following is not a response?
a tree turning its leaves towards the sun
a mushroom appearing wet in the rain
a protozoa contracting when touched
your stomach rumbling when you smell food
Answer:
The correct option is B) a mushroom appearing wet in the rain.
Explanation:
A response is generated when a living body detects a change or event as a signal or a stimulus.
In the option A, the Sun acts as a stimulus. The response is the tree turning its leaves.
In the option C, touch is the stimulus. The contraction of the protozoa is the response.
In the option D, the smell of food is the stimulus. Rumbling of the stomach is the response.
In the Option B, no response is carried out by the mushroom. Hence option B does not show an action or response.
Answer:
B. A mushroom appearing wet in the rain.
Explanation:
It is not a response it just looks wet when it is in the rain.
The relative concentration of water in a hypotonic solution is _____. low high stable equal
Answer:
The correct answer is high.
Explanation:
Hypotonic solution is a specific type of solution in which the concentration of water molecules is high than that of solute molecules present within that solution.
Susana heats up a sample of red crystals. While the sample is being heated, a gas is released and a blue powder is left after the heating. Is the sample of red crystals an element or a compound? Explain your answer.
MY ANSWER:
The red crystals are compounds. This is because when the sample is heated, a GAS (element) is released and BLUE POWDER (element) is left. Two elements make up these red crystals. A compound can also be shown through color change - the RED crystals, when heated, turn into BLUE powder. Elements cannot be broken down into substances using physical force, like heating. So yes, this is a compound.
SAMPLE ANSWER:
Susana's red crystal sample is a compound because it was broken down into a gas and blue powder. It is not an element because elements cannot be broken down into simpler substances by ordinary means, such as heating.
MAKE SURE TO INCLUDE AND ELABORATE ON THE FACT(S) THAT:
- Elements cannot be broken down into simpler substances.
[and]
- Compounds can be broken down into simpler substances.
I hope this helps! I wanted to post this for the help of future searchers.
Answer:
You can use either your answer or the sample answer you gave. You are so nice by the way!
Explanation:
THE FOLLOWING ARE TWO ANSWERS YOU CAN CHOOSE FROM
ANSWER 1:
The red crystals are compounds. This is because when the sample is heated, a GAS (element) is released and BLUE POWDER (element) is left. Two elements make up these red crystals. A compound can also be shown through color change - the RED crystals, when heated, turn into BLUE powder. Elements cannot be broken down into substances using physical force, like heating. So yes, this is a compound.
ANSWER 2:
The red crystals are compounds. This is because when the sample is heated, a GAS (element) is released and BLUE POWDER (element) is left. Two elements make up these red crystals. A compound can also be shown through color change - the RED crystals, when heated, turn into BLUE powder. Elements cannot be broken down into substances using physical force, like heating. So yes, this is a compound.
EITHER ONE YOU CHOOSE WILL BE CORRECT, JUST SAYING!
Describe the term Xylem
Answer:
the tissue in plants that conducts water and nutrients upwards from the root
Mary has type A blood. Her son Bill has type AB blood. Which blood type does Bill's dad have if he is homogenous for blood
type?
B
O AB
0
Answer:
Bill's dad has blood type B
Explanation:
See punnet squares attached
It's given that the dad's blood type is homogenous -> the two letters must be the same. So we can eliminate AB, we have B and O as the options left
If the dad's blood type is O, using punnet square, we can figure out that it then would be impossible for Bill to have blood type AB (AO = blood type A) --> Incorrect
If the dad's blood type is B, using punnet square, we see that the probability that Bill has blood type AB is 100%
Answer:
B, Bill has blood type B) on edge 2020
1. What is a predator?
2. Are all predators animals?
Give examples to support your answer.
Your answer should include at least three complete sentences.
Answer:
There are four commonly recognized types of predation: (1) carnivory, (2) herbivory, (3) parasitism, and (4) mutualism. Each type of predation can by categorized based on whether or not it results in the death of the prey.
Explanation:
Some examples of predator and prey are lion and zebra, bear and fish, and fox and rabbit. The words "predator" and "prey" are almost always used to mean only animals that eat animals, but the same concept also applies to plants: Bear and berry, rabbit and lettuce, grasshopper and leaf.The best-known examples of predation involve carnivorous interactions, in which one animal consumes another. Think of wolves hunting moose, owls hunting mice, or shrews hunting worms and insects.
______ are found in the stroma of chloroplasts small coins that provide energy. numerous mitochondrial membranes. stacks of thylakoids called grana. organelles called eukaryotes
Answer:
The correct answer is small coins that provide energy
Explanation:
Small coins structures are found in chloroplast which are termed as thylakoid.There are stacks like arrangement of thylakoids within the granum.
The Surface area of thylakoids is being increased by grana as a result more light is absorbed by the chloroplast.
The thylakoid of granum is the site of light reaction.
The observed redshifts of galaxies are evidence for the Big Bang Theory of the origin of the universe because they indicate that
Answer:
Are moving rapidly away in all directions
Explanation:
Edwin Hubble discovered in 1929 that the distance to far away galaxies were generally proportional to their red shifts astronomers viewing distant stars see evidence of this expansion evidence of red shift
I hope this helps Mate :) Sorry im late
Which event would most likely throw off dynamic equilibrium in an ecosystem? a lengthy drought, the birth of a litter of rabbits, a hunter killing a deer the death of several plants
A lengthy drought is the event most likely to disrupt dynamic equilibrium in an ecosystem due to the critical role of water in maintaining plant and animal life, and the cascading effects on food chains and survival of species.
Droughts can have severe impacts on ecosystems, as they can lead to a shortage of water resources, which are critical for the survival of plants and animals. For example, in the Four Corners area, a lengthy drought was associated with a vegetation increase followed by a rise in the deer mice population, which led to the outbreak of Hantavirus in humans. Additionally, droughts can disrupt food chains by causing the death of plants, which are the primary producers in most ecosystems. Changes in vegetation can also lead to mismatches in food availability for animals that rely on certain plants. The death of several plants, which might occur as a result of a drought, also affects ecosystems but typically on a smaller scale than a prolonged absence of rain.
listed in the item box are individual steps that need to be ordered to find out more information about steps some have more details available when you click drag and drop the steps in proper order by placing each in his correspondent open rectangle be sure that the earlier step is placed next to the number one.
ITEM BANK:
Class Family Genus Kingdom
Order Phylum Species
________________________
1.
2.
3.
4.
5.
6.
7.
Answer:
Kingdom
Phylum
Class
Order
Family
Genus
Species
Explanation:
To classify the numerous organisms, we need a system which helps us to classify all the organisms so that it becomes easy for us to study about them. Carolus Linnaeus, a Swedish botanist developed a system of classification called Taxonomical classification. He classified all living organisms in eight ranks,
domain>Kingdom>Phylum>Class>Order>Family>Genus>Species.
( from general to specific)
Pre-Lab Work
1. Design an Experiment: What is the independent variable in this experiment (i.e., the
variable that you manipulate)?
The blood vessel that carries blood into the glomerulus is called the:
afferent arteriole
O vasa recta
peritubular capillary
O
efferent arteriole
arcuate artery
interlobular artery
Answer:
Afferent arteriole
Explanation:
A glomerulus is formed from the afferent blood vessels, a branch from the renal artery. The afferent arteriole collects blood from the glomerulus and extends to the renal tubule where it divides into capillaries that ramify the tubule. The afferent arteriole is wider than the efferent arteriole.
15. Which of the processes has more than one type of RNA involved?
Answer:
Translation
Explanation:
Translation is the process by which mRNA is decoded and translated to produce a polypeptide sequence, otherwise known as a protein. This method of synthesizing proteins is directed by the mRNA and accomplished with the help of a ribosome, a large complex of ribosomal RNAs (rRNAs) and proteins. In translation, a cell decodes the mRNA’s genetic message and assembles the brand-new polypeptide chain. Transfer RNA, or tRNA, translates the sequence of codons on the mRNA strand. The main function of tRNA is to transfer a free amino acid from the cytoplasm to a ribosome, where it is attached to the growing polypeptide chain. tRNAs continue to add amino acids to the growing end of the polypeptide chain until they reach a stop codon on the mRNA. The ribosome then releases the completed protein into the cell.
In a mitochondria chemical energy becomes available to cells through a process called
Answer:
Oxidative phosphorylation.
Explanation:
Mitochondria use oxygen, which is available within the cell to convert chemical energy from food in the cell to energy in the usable form to the host cell. This process is called oxidative phosphorylation. It occurs inside of the mitochondria. In the matrix of mitochondria, the production of NADH happens by the citric acid or Krebs cycle. After the creation of NADH, it is used by enzymes that are fixed in the mitochondrial inner membrane to produce ATP. Energy is stored in the ATP as a form of chemical bonds.
These bonds can be opened, and the energy can be delivered.
Describe the biotic and abiotic features of the tropical rain forest
What can be inferred about the role of a ribosome
Find amino acid for the mRNA code AAG
Answer:
phenylalanine
Explanation:
A base set of triplet called codon codes for a particular amino acid of protein molecule. Protein synthesis takes place in ribosomes found in the cytoplasm. Information on the mRNA is translated by ribosomes and is used to assemble amino acids into specific protein molecules.