Based on the evolutionary tree of the three domains, all three domains have a common ancestor is true. Studies of molecular biology, as well as phylogenetic analysis, have shown that all three domains of life (Bacteria, Archaea, and Eukarya) share a common ancestor. However, the relationships between the three domains are still being studied and debated, so it is not clear which of the other statements are true.
All three domains of life (Bacteria, Archaea, and Eukarya) share a common ancestor. This is supported by molecular biology and phylogenetic analysis, which have shown that the three domains are related through evolution. However, the exact relationships between the three domains are still being studied and debated.
while some studies suggest that Bacteria and Eukarya are more closely related to each other than either is to Archaea, others suggest that Archaea is more closely related to Eukarya.
Additionally, while Eukarya share a common ancestor, it is not clear if they have remained the same throughout evolutionary time or if the Eukarya are the common ancestor of the three domains.
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Can anybody tell me how cell shape affects function? For example if columnar and epithelial cells shapes affect their respective functions?
Answer:
Cell Shape: Large surface area = Function: Absorption/metabolism increases
Explanation:
The large the surface area of a cell allows for more receptors to interact to increase the amount of metabolism that occurs within the cell. The example you provided, columnar and epithelial cells, are found in various locations throughout the body but are most notable found in the intestinal lining of our intestines. The shape of the columnar which is made up of epithelial cells is waved shaped to allow for more surface area within a given location. Consequently, leading to further absorption.
Reactive metals usually react with
A. Bases, noble gases, air.
OB. Air, magnesium and sodium.
OC. Noble gases, air, water.
D. Water, oxygen and acids.
Answer:
[tex]\fbox {D. water, oxygen and acids}[/tex]
Explanation:
Reactive metals usually react with water, oxygen and acids.
Using the reactivity series of metals, we can see which metals are more reactive, such as sodium and potassium.
Answer:
D. water , oxygen and acid
Explanation:
why because noble gases are unreactive. magnesium and sodium are examples very reactive metals.
Which of the following is an environmental factor that could cause a mutation?
A. psychological agents
B. irrelevant mutagens
C. internal agents
D. biological mutagens
Answer: D. biological mutagens
Explanation:
Two individuals who are heterozygous for Huntington’s are pregnant with a child. What is the probability that the resulting child will not inherit Huntington’s disease ?
Calculate the probability. The Punnett square is provided to show your work
The probability that the resulting child will not inherit the disease is 25%.
Probability in geneticsAssuming that the disease is represented by the allele A (a). Huntington's disease is autosomal dominant.
Thus, the genotypes of the two parents will be Aa each.
Aa x Aa
AA Aa Aa aa
Probability of the child having Huntington's = 3/4 or 75%
Probability of the child not having Huntington's = 1/4 or 25%
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3. How many limbs do organisms in the order Gymnophiona have? 1: two 2: multiple pairs 3 : none
the organisms in the order Gymnophiona have no limbs. Option 3
What is Gymnophiona ?
Gymnophiona also called Apoda, area known as one of the three major orders of the class Amphibia.
Its members are known as caecilians which means “sightless” or “blind.”
Majority of the organisms in this group are limbless and wormlike amphibians that live underground in humid tropical regions throughout the world.
They are believed to have internal fertilization.
Their heads are blunt, and their skulls are bony and compact in nature.
Since they are limbless, they have no limbs
Thus, the organisms in the order Gymnophiona have no limbs. Option 3
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Answer:
I hope this helps.
Explanation:
Describe the four major steps of digestion, and discuss the organs involved in each.
nouth, oesophagus, stomach, duodenum, pancreas, ileum,colon, rectum,anus.
Answer:
Ingestion is when food comes into the body through the mouth and down the esophagus. Digestion begins with chemically with enzymes in saliva, and mechanically with the teeth, and continues when food (as a bolus) enters the stomach to be dissolved by acid and pepsin. Food (chyme) then goes into the small intestine where nutrients are absorbed through the villi. Waste is then eliminated through the large intestine, rectum, and anus.
Explanation:
Answer from Biology Part 2 Test.
Answer the question stated
Answer:
Methane is formed as a result of Mining of coal
What has happened to atmospheric carbon dioxide level and global temperature since the graph in the interactive, which was created in the year 2014?
There has been a rise in the atmospheric carbon dioxide level and global temperature since 2014.
What is Temperature?This is referred to as the degree of hotness or coldness of a substance or body and its SI unit is Kelvin.
Carbon dioxide has been on the rise due to it being formed from the combustion of fossil fuel burning thereby leading to global warming.
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Make sure the answers to all four questions are correct. 100% correct answer. Thank you
Chicken, beef, pork, and egg are sources of protein from most efficient to least efficient.
option(a) and option(b) i.e, being an informed consumer and buying locally farmed produce supports sustainable agriculture.
overnutrition is consuming more calories than necessary. undernutrition is consuming less calories than necessary. malnutrition is not consuming enough food to gain specific nutrients needed to sustain life.
option ( a, b, e, f, i, and j ) are risks of using pesticides.
Large biomolecules and macromolecules known as proteins are made up of one or more extended chains of amino acid residues. It aids in cell regeneration and repair in your body.
Sustainable agriculture is the practice of farming in a way that satisfies society's current demands for food and textiles without endangering the ability of present or future generations to meet their own needs. It might be founded on knowledge of ecosystem services.
The biochemical and physiological process by which an organism uses food to sustain its life is known as nutrition. Consumption, absorption, assimilation, biosynthesis, catabolism, and excretion are all included. Nutritional science is the field of study that focuses on the physiological aspects of nutrition.
Pest control agents are compounds known as pesticides. Insecticide, nematicide, molluscicide, piscicide, avicide, rodenticide, bactericide, insecticide, animalized, microbicide, fungicide, and lampricide are some examples of these.
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which type of inhibitor will achieve saturation point at alower substrate concentration? With a reason
The molecule in question is classified as an enzyme inhibitor because it interferes an enzymatic reaction. There are two types of inhibitors; competitive and noncompetitive inhibitors. Competitive inhibitors bind to the active site of the enzyme and control substrate from binding.
What do competitive and noncompetitive inhibitors do?
The competitive inhibitor binds to the occupied site and prevents the substrate from binding there.
The noncompetitive inhibitor binds to a separate site on the enzyme; it doesn't block substrate binding, but it causes other differences in the enzyme so that it can no extended catalyze the reaction efficiently.
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Scientists sometimes say that we know less about the oceans than the far side of the Moon. Why is it so difficult to learn about the oceans?
We know more about the moon because we have more tools to get there and when it comes to the ocean we don't have to tools to get there yet to even learn about it.
Which phrase describes faults?
Answer:
socorrates dijo conócete a ti mismo
yo digo conócete a tus usuarios
y adivina que ellos no piensan como tú
Explanation:
conócete primero a ti mismo
. Which season is the Southern Hemisphere experiencing in the picture?
Answer: summer
Explanation:
The Sanger method of DNA sequencing requires which of the following to be in the reaction tube? Choose one: O A. template DNA O B. deoxyribonucleotides O C. dideoxyribonucleotides O D. A, B, and C are correct. O E. Only A and B are correct. O F. Only A and Care correct.
D. A, B, and C are correct regarding DNA sequence. A technique for figuring out the nucleotide sequence of DNA is called Sanger sequencing, commonly referred to as the chain termination method.
Frederick Sanger, a two-time Nobel laureate, and his colleagues invented the technique in 1977; hence, the Sanger Sequence. DNA template, DNA sequence primer, thermostable DNA polymerase, nucleotides (dNTPs), dideoxynucleotides (ddNTPs), buffer, and dideoxynucleotides (ddNTPs) are needed for Sanger sequencing. Sanger sequencing is a technique for DNA analysis that uses electrophoresis and is based on DNA polymerase's haphazard incorporation of chain-terminating dideoxynucleotides during in vitro DNA replication. It is frequently used to check for known familial variations, to validate NGS results, and in rare cases, for single gene sequencing.
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2. Bone
A 68-year-old Asian female presents with mildly achy muscles and joints. The aches seem to “come and go” quite often lasting for several days at a time. Upon examination you take note of a hunch-backed appearance on the patient. An x-ray is performed and showed a significant decrease in bone tissue mass. After further diagnostic testing is performed the patient is diagnosed with Osteoporosis. TAKE NOTE: Osteoblast cells build bone matrix while osteocytes maintain the matrix. Osteoclast cells break down bone matrix and reabsorb the nutrients.
Using your knowledge of the human physiology, which of the following do you predict is a potential cause of the Osteoporosis?
A. Decreased osteoblast activity B. All choices are potential causes
C. Increased osteoclast activity D. Secondary to external factors like drugs/cancers
Osteoporosis causes bone density to decrease due to decreased osteoblast activity, increased osteoclast activity, and external factors like long-term medication. Option B. All choices are potential causes.
What are the factors that promote osteoporosis?
Let us first review what the bone cells are and their functions,
• Osteoprogenitores → in charge of osteocytes production
• Osteocytes → maintain the matrix
• Osteoblasts → Synthesize and secrete osteoid matrix that will later calcify
• Osteoclasts → Phagocytic cells in charge of osseous resorption and bone modulation.
Osteoporosis is a no-symptoms disease -silent- that causes a decrease in the bone mineral and mass density and might change the bone structure.
Osteoporosis weakens the bone until it breaks. So this affection becomes evident when a fracture occurs.
Several factors lead to osteoporosis development. Among them, we can mention,
genetic factors, habits factors (lifestyle),hormonal alterations,drugs/medication
The increased rate of bone resorption is the major mechanism by which osteoporosis occurs. It deteriorates bone structure and decreases bone density.
Bone resorption and deterioration might be caused by
a decrease in osteoblast activity, leading to the decrease in osteoid matrix formation and calcification,an increase in osteoclast activity, enhancing the activity of these phagocytic cells.
Other external factors also increase the probability of developing osteoporosis. Some of them are,
long-term medications (for instance, those used in cancer treatment) excessive alcohol consumption and smokingsedentary lifestylepoor dietAccording to this framework, the potential causes of the Osteoporosis are Decreased osteoblast activity, Increased osteoclast activity, Secondary to external factors like drugs/cancers.
Hence, option B is correct, All choices are potential causes.
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The correct examples of nonrenewable resources are:
petroleum, coal, and gas
water, petroleum, and coal
water, wind, and sunlight
sun, fossil fuels, and wind
can samone help me fill this diagram
Starting by the top, the yellow sphere is an Amino Acid. On it's left is a Protein, formed by a chain of Amino Acids. To the right of the Amino acid it is a tRNA, the responsible for carring the Amino Acids. Under the tRNA, the arrow pointing to a red part is showing a Ribossome. Under the Ribossome box, the arrow is point to the A site of the Ribossome; and on the other side is the E site of Ribossome. At the bottom, the arrow that is pointing to the bottom part of the Ribossome is pointing to a Codon. And the last one at the left bottom site is pointing to the mRNA.
What is translation?
Translation involves "decoding" a messenger RNA (mRNA) and using its information to produce a polypeptide or chain of amino acids. Overall, a polypeptide is basically a protein (with the technical difference that some large proteins are made up of many polypeptide chains).
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Which of the following occurs in meiosis but not mitosis?
O Sister chromatids separate and move to opposite ends of the spindle
O Homologous chromosomes separate
O The cells formed have the same combination of genes as found in the initial cell
O The nuclear envelope disappears
OA spindle apparatus forms
Answer:
AnswerThe nuclear envelope disappear
Match functions to the appropriate groups of proteins.
enzymes proteins of extracellular structures
proteins of myofilaments in the cells of muscle tissue
proteins playing a role in the organism's defense system
proteins transporting oxygen in the blood hormones
proteins of the karyokinetic spindle
Function
transformations
of matter and
energy
control of
metabolic
processes
formation of
structural
components
transport
movement
cell division
defense
Group of Proteins
Examples
trypsin, lipase,
carbonic
anhydrase,
cytochrome c
insulin, glucagon,
growth hormone
collagen
hemoglobin
actin, myosin
tubulin
immunoglobulins
The groups of proteins and their appropriate functions include the following:
Enzymes proteins of extracellular structures - collagen.Proteins of myofilaments in the cells of muscle tissue - myosin, actinProteins playing a role in the organism's defense system - immunoglobulinsProteins transporting oxygen in the blood hormones - hemoglobinProteins of the karyokinetic spindle - tubulinWhat is Protein?This is referred to as a biological molecule which is involved in the growth and repair of tissues in the body system. They contain two or more amino acids which are derived when they are broken down with the aid of enzymes.
There are different types of proteins with their specific functions such as hemoglobin being an oxygen carrier in the blood etc. The groups of proteins and their appropriate functions can be seen above.
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Select the description of sensory receptors.
1. A group of neuron cell bodies located in the CNS
2. Organs of the PNS that conduct impulses toward the CNS
3. Cells that detect changes in the body or external environment
4. The axon terminals of efferent fibers that synapse with muscle fibers
How do earth energy budget effect earths system
Answer:
The absorbed sunlight drives photosynthesis, fuels evaporation, melts snow and ice, and warms the Earth system. Solar power drives Earth's climate. Energy from the Sun heats the surface, warms the atmosphere, and powers the ocean currents.
What would the genotype of the parent mice need to produce offspring with the genotypes. FF and Ff? (An empty punnet square is provided to show your work)
Show your work
The genotypes of the parents to produce offspring with the genotypes FF and Ff are FF and Ff.
What is Punnett square?The Punnett square is a graphical representation used to determine the frequency of a given genotype.
In this case, the Punnett square may be (alternatively, parents can also be heterozygous):
F f
F FF Ff
F FF Ff
In conclusion, the genotypes of the parents are FF and Ff.
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Max's teacher told the class that he was providing an exam with five difficult questions because this exam would take them less time to complete than a typical exam with twenty questions. The teacher said he would let them leave school when they finished and start their weekend. What obstacle did Max's teacher use to gain the students' support?
Belief perseverance
Fixation
Framing effect
Overconfidence
Max's teacher use to gain the student's support by adding the obstacle of framing effect in the examinations. Thus, the correct option is C.
What is Framing effect?The framing effect is a cognitive bias in which the brain makes all the decisions about information depending upon how the information is presented to them. In this, people decide the options which were based on whether the options are presented with positive or negative connotations to them. For examples: the students doing examination.
People tend to avoid the risk when a positive frame is presented to them however they seek the risks when a negative frame is presented to them. Framing effect occurs when the decisions which people make are changed as a result of the way in which the outcomes are described to them.
Therefore, the correct option is C.
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Please help!!
Choose the set of organisms that would most likely be considered to be one family.
According to phylogenetic tree, the organisms of 5 and 15 would most likely be considered to be one family.
What are the characteristics of phylogenetic tree?A phylogenetic tree is a branching diagram or a tree showing the evolutionary relationships among various biological species or other entities based upon similarities and differences in their physical or genetic characteristics.
A phylogenetic tree, also known as a phylogeny, is a diagram that depicts the lines of evolutionary descent of different species, organisms, or genes from a common ancestor.
Phylogenetics is a powerful approach in finding evolution of current day species. By studying phylogenetic trees, scientists gain a better understanding of how species have evolved while explaining the similarities and differences among species.
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DNA and RNA are structurally similar but also have some notable differences. RNA has uracil in place of thymine as one of its bases, uses ribose in place of deoxyribose, and
Question 4 options:
A)
can't form base pairs.
B)
has a different phosphate group in its backbone.
C)
is a polymer of nucleotides and amines.
D)
often exists as a single-stranded molecul
Answer:
D.) often exists as a single-stranded molecule
Explanation:
One notable difference between DNA and RNA is that DNA consists of 2 nucleotide strands and RNA consists of 1.
Economic profit equals zero when total revenue (TR) equals total cost (TC).
The statement is true. Economic profit equals zero when total revenue (TR) equals total cost (TC).
In Economics, total cost is defined as the sum of costs that is incurred by firm for the production of certain level of output.
Mathematically, it is calculated as:
TC (total cost) = TFC (total fixed cost) + TVC (total variable cost)
Fixed cost refers to a cost that does not change with an increase or decrease in the number of goods or services produced or sold.
Variable cost changes with an increase or decrease in the number of goods or services produced or sold.
Total revenue is also called gross revenue. It is the total amount of income your company brings in from selling your products/services.
When total revenue (TR) equals total cost (TC), economic profit equals zero.
Hence, the given statement is true.
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Explain why plant forms of plankton are not as widespread throughout the depths of the oceans as the animal forms are
Explanation:
Phytoplankton is the base of several aquatic food webs . In a balanced ecosystem, they provide food for a wide range of sea creatures
Down in the ocean depths lot's of nutrients are available for the phytoplankton but without sunlight they can't grow phytoplankton use nutrients and must be transported to the surface
ILL GIVE BRAINLIEST Question 3 of 5
What is one way that poor air quality can create problems for humans in the
United States?
A. The loss of trees damages the surrounding ecosystem.
B. Some people lose their vision.
C. The process leads to algal blooms in rivers, streams, and lakes.
D. Some people develop allergies or breathing issues.
Some people develop allergies or breathing issues is one way that poor air quality can create problems for humans in the United States.
What level of air quality is safe?The level of poor air quality and the resulting health risk increase with increasing AQI values. An AQI value of 50 or less, for instance, suggests clean air, even though one of over 350 indicates polluted air.
How does the quality of the air influence you?Poor air quality can aggravate asthma and related disorders, irritate ones eyes, nose, & throat, induce shortness of breath, and have negative effects on the heart and circulatory system. Long-term exposure to contaminated air can result in more severe issues.
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carbohydrates and lipids
Answer: what about carbohydrates and lipids you're asking about?
Explanation:
Place the steps of the infection in the correct order.
1
2
3
4
5
6
7
LOL
LOL I also don't know the answer bro sorry
LOL