Pavlov's experiments with dogs displays a type of behavior of conditioning, as the dogs expected to receive food after listening to a determinated sound, being this a learnt behavior.
The correct answer is option B.
Which group of scientists introduced the Three Domaine System?Aristotle and SocratesB. Fox and LinnaeusC) Woese and Fox
Solution:
The three-domain system is a biological classification introduced by Carl Woese et al (Fox). in the year 1990. In this classification, the cellular life forms are divided into the following 3 domains;
1. Archaea,
2. Bacteria and
3. Eukaryotes.
So that, we can conclude that the correct answer is:
C) WOESE AND FOX.
The process of transporting materials in a cell involves a positive change in the amount of free energy in the cell. Which of the following best describes how this process affects the cell?The process is non-spontaneous and causes an increase in entropy.The process is non-spontaneous and moves the cell away from equilibrium.The process is spontaneous and can be used to do work in the cell.The process is spontaneous and releases heat to the cell's surroundings.
The process is non-spontaneous and causes an increase in entropy.
The process is not automatic even thoug it involves transportation of materials in a cell. There is a change in the amount of free energy but there is entropy.
the place where a river begins is called?
The place where a river begins is called source or headwaters, being the rivers the construction from water that comes of smaller streams that join together forming tributaries.
Tabulate in detail the comparison among Simple Diffusion, Facilitated Diffusion, and Active Transport across a cell membrane.
The cell has several types of membrane transport alternatives, being the simple diffusion, facilitated diffusion, and active transport one of the options for the cell to exchange molecules between internal and external environment.
The types of cell transport:
1 - Simple Diffusion: is a process that does not need energy (passive), used to transport small and nonpolar molecules from a region of higher concentration into a region of lower concentration (in the gradient concentration direction);
2 - Facilitated Diffusion: is a process that does not need energy (passive), used to transport larger ions and polar molecules with the help of carrier proteins or pore proteins (transport proteins);
3 - Active Transport: There is two types of active transport, primary active transport is used for molecules moving against their gradient coupled to the hydrolysis of ATP, and secondary active transport is for molecules going with more molecules against their gradient. It is a process that needs energy (active) to happen, going always against the gradient of concentration of the cell.
What’s this please help
Answer: The Ocean
Explanation: The ocean contains a vast amount reservoir of carbon this is because of the organisms in the ocean that take carbon dioxide.
the earth orbits the sun true or false
Earth rotate in an orbit around the sun. It takes 365 days, 6 hours, 9 minutes for the earth to complete its revolution around the sun. Its directional rotation to the sun is counterclockwise. Leap year is scheduled on the 6 hours, 9 minutes which is an additional 24 hour every fourth year.
Answer - True
Which action would most likely lead scientists to change or improve an existing scientific theory about evolution?
Answer: Gathering new evidence using new technologies or procedures most likely will lead scientists to change or improve an existing scientific theory (Option D).
Explanation:
Which of the following does not have high potential energy? atpnitrogenglucoseconcentration gradientelectrical/ion gradient
The potential energy is the energy that depends upon relative position or various part of a system and the potential charge that a molecule have. The molecules of ATP, nitrogen, and glucose have high potential energy, as well as the ion gradient in a cell membrane, however the concentration gradient does not require neregy input, since the energy stored in it is the one used to balance the concentrations.
What is an antibiotic?A. a chemical substance produced by microorganisms that helps the growth of other microorganismsB. a chemical substance produced by microorganisms that inhibits the growth of or kills other microorganismsC. a naturally occurring substance produced by microorganisms that helps the growth of other microorganismsD. a naturally occurring substance produced by microorganisms that inhibits the growth of or kills other microorganisms
Antibiotics are substances that inhibit the growth of other organisms, such as bacteria, but also our very own cells. These molecules are naturally produced by fungi and were discovered by Fleming in 1928. The answer option that better describes this is the last one: "D. a naturally occurring substance produced by microorganisms that inhibits the growth of or kills other microorganisms".
Antibiotics are substances that inhibit the growth of other organisms, such as bacteria, but also our very own cells. These molecules are naturally produced by fungi and were discovered by Fleming in 1928. The answer option that better describes this is the last one: "D. a naturally occurring substance produced by microorganisms that inhibits the growth of or kills other microorganisms".
Which of the following statements about the electron transport chain is true?
Group of answer choices
A) It is driven by ATP hydrolysis.
B) It includes a series of hydrolysis reactions associated with mitochondrial membranes.
C) It consists of a series of redox reactions
D) It occurs in the cytoplasm of both prokaryotic and eukaryotic cells.
Answer: I'm im 99% sure it's C "It consists of a series of redox reactions" if it's right do you mind giving a brainliest?
Which of the following does an ecologist study?
OA. Interactions between living organisms and the natural
environment
B. Historical changes in forms of government and economic
systems
C. The effects of smaller factories on internal trade
D. The impact of technology on communications and human
relationships
Answer:
The answer is A
Explanation:
An ecologist studies the relationship between living things and their habitats.
Smooth muscles are described as…a) Voluntaryb) Involuntaryc) Striatedd) Cardiac
Smooth muscles
This type of muscle comprises smooth muscle fibers that correspond to uninucleate cells, thin and pointed at the ends. This muscle forms the contractile portion of the walls of various organs such as the digestive tube and blood vessels, which is why it is characterized by involuntary contraction (option b).
The Meselson-Stahl experiment demonstrated that DNA replication is semiconservative. In the figure, semiconservative replication is illustrated byA) AB) BC) A mix of these methods, depending on the cell typeD) C
DNA replication is called semiconservative because, in each copy that is made of the DNA, one of the strands comes from the template. This means that all copies of DNA retain one strand of the original DNA (semiconservative). Therefore, the image that best illustrates DNA replication is A.
What effects will result in an individual with this karyotype?
Answer: Trisomy 21
Expanation: tTe most common chromosomal anomaly in humans, affecting about 5,000 babies born each year and more than 350,000 people in the United States. Also known as Down syndrome, trisomy 21 is a genetic condition caused by an extra chromosome.
Suppose that a plant had chloroplasts that could carry out the Calvin cycle, but these chloroplasts could not carry out the light-dependent reactions. Explain why these chloroplasts could not carry out photosynthesis to produce sugars.
Plants with chloroplasts carrying out Calvin cycle but unable to carry out light-dependent reactions could not carry out photosynthesis because to produce sugars, the light dependent reactions are essential in order to produce ATP and NADPH.
Calvin cycle is the light-independent reaction that is performed with the help of products from light dependent reactions. The Calvin cycle is accomplished in three steps: Carbon fixation, reduction and regeneration. The product of Calvin cycle is triose phosphate which is further used in glucose production.
Light dependent reactions are those that involved in the production of ATP and NADPH through a series of electron transporters. These ATP and NADPH are therefore used for synthesis of glucose.
To know more about Calvin cycle, here
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Of the most common cancers, which are the top 3 for 5-
year relative survival? Which are the bottom 3?
Answer:
Top 3 cancers for 5 years survival are:
1. Melanoma
2.Hodgkins lymphoma
3. Breast cancer
Bottom 3 cancers for 5 years survival are:
1. Mesothelioma
2.pancreatic cancer
3. Brain cancer
Explanation:
Prognosis describes how serious your cancer is and your chances of survival. 5-year survival means the percentage of people who will be alive 5 years after diagnosis.
Food Web AssignmentDirections illustrate the flow of energy within the aquatic system below by completing each direction below.SquidBlue WhaleSealKrillPenguinZooplankton1.) Draw in 8 arrows to show how the energy moves to create a food web. You may have to do a little research to help youmake all the correct connections!2.) Where would phytoplankton and the Sun belong in this food web? Draw it as well as an arrow connecting each one accurately.3.) How would bacteria nit into this food web? Describe how you would draw it in. 4.) Classify each of the 7 organisms in the aquatic food web, as well as bacteria, as a producer, consumer or decomposer by writing each into the correct category below. • Producer - • Consumer - • Decomposer -
For the first and second question we have:
Squid eats: Krill
Blue whale eats: Krill
Seal eats: Krill, Squid, Penguins (Only leopard seals)
Krill eats: Zooplankton (and phytoplankton)
Penguin eats: Krill, squids
Zooplankton eats: no one (in the picture, but they eat phytoplankton)
For the third question: Bacteria enter as decomposers in the food web.
Finally, for the fourth question we have:
Producers: Phytoplankton
Consumers: squids, blue whale, seal, krill, penguin and zooplankton
Decomposer: Bacteria
True or false? Having an autoimmune disease will eventually lead to death.Select one:TrueFalse
Answer: False
Explanation: Having an autoimmune disease will not necessarily lead to death, many of them have a treatment which allows the patient to maintain his/her quality of life.
Which type of sedimentary rock is pictured here?
What do you think would happen to the population of peppered moths once coal use decreased and the trees no longer were covered in soot?
Answer:they would turn back white
Explanation:once the soot is gone, they return to natural colour again due to camouflage
Fungi exist as single cells or as branching networks of multicellular filamentswith a very large surface area. What is the function of the filaments?A. ReproductionB. Nutrient absorptionC. Energy productionD. Photosynthesis
Micelium, which is formed by a number of filaments, has the main function of penetrating the substrate in search of food and nutrient. Moreover, it can suffer some modifications to form reproductive structures.
The correct option is: B. Nutrient absorption.
The nervous system is responsible for?
Answer:
The nervous system transmits signals between the brain and the rest of the body, including internal organs.
Explanation:
The nervous system's activity controls the ability to move, breathe, see, think, and more.
The Hoover dam across the Colorado river contains a large power plant that generates electricity by what type of power?A. hydro-powerB. Solar power C. nuclear power D. geothermal power
The correct answer is A hydro-power energy.
This type of energy is a renewable energy. A hydropower plant is located always in a river because they are used to transform the kinetic energy of the water and or its gravitational potential energy into power, generating electricity. This process occurs in a turbine.
Given: dna codon chart, DNA sequence.DNA sequence given is: 3’ TAC CCC GAT AAA ATA CAT TTA GGA TCG CGA TGG TAT 5’How do you transcribe the DNA sequence into mRNA?And can you underline or highlight on the sequence the codons for Proline and Tyrosineand label which is which? Thanks
Step 1:
The process of DNA transcription occurs from the 5' to 3' being the DNA sequence in the correct order for transcription as follow:
5' TAT GGT AGC GCT AGG ATT TAC ATA AAA TAG CCC CAT 3'
Step 2:
Resulting in the mRNA:
5' AUA CCA UCG CGA UCC UAA AUG UAU UUU AUC GGG GUA 3'
- Being the nucleotide thymine replaced by uracil in the formation of the RNA strand.
Step 3:
The codons sequence that form proline and tyrosine are:
Proline: CCA;
Tyrosine: UAU.
What enzyme unwinds or unzips the
parent strand in DNA?
Answer:
Helicase
Explanation:
To begin DNA replication, unwinding enzymes called DNA helicases cause the two parent DNA strands to unwind and separate from one another.
Some adult chordates do not exhibit the characteristic features of the phylum Chordata. What is the likely reason?
A likely reason why some adult chordates do not exhibit all the characteristic features of the phylum Chordata, is that some features are present during development but are subsequently lost or become another structure. (option 2)
Sickled red blood cell normal red blood cellSickled red blood cells carry less oxygen than normal red blood cells. What does this demonstrate about mutations in the DNA thatcodes for hemoglobin?OA. These mutations can change the structure and function of hemoglobin.OB. These mutations decrease the amount of oxygen available to bind with hemoglobin.OC. These mutations are unable to affect the structure and function of hemoglobin.OD. These mutations can change the structure of oxygen so that it does not bind to hemoglobin.
The answer is the letter A. These mutations can change the structure and function of hemoglobin.
The effect of the mutation in the hemoglobin is it altered its structure that makes
True or FalseDarwin theorized that the forces seen today in the biological world such as reproduction, inheritance, and competition gradually produce the whole diversity of life on Earth.
The correct answer is FALSE. Although Darwin, indeed recognized reproduction and competition as important drivers of global biodiversity, he did not included the role of inheritance. Rather, he emphasized the role of competition and natural selection.
What is the name of the southern part of South America?
Answer:
I think Andes
The lymphatic system contains a network of vessels that transport fluids very similar to what other body system?Skeletal systemCardivoascular systemMuscular systemNervous system
Lymphatic system
The lymphatic system is made up of vessels and lymph nodes and its main function is the transport and circulation of fluids that are present in the body's tissues.
Thus, we can say that the lymphatic system resembles the cardiovascular system because the cardiovascular system is also composed of vessels and its main function is to circulate blood in the body.
So "cardiovascular system" is the answer.
