Answer:
genetic diversity - a population of a spider species
keystone species - sea otters eat sea urchins
species diversity - researchers in the amazon
ecosystem diversity - three populations of insects
Explanation:
plato
You are studying primates in West Africa and discover a small population of monkeys in an isolated forest. They resemble a species that lives about 50 kilometers away, across a river. The main difference appears to be white tufts of fur underneath the ears in the new population you've found. What evolutionary mechanism probably explains this difference?
Answer:
Geographical isolation
Explanation:
The evolutionary mechanism that can probably explain the difference, in this case, is geographical isolation.
Geographical isolation represents one of the reproductive isolation mechanisms - an array of physiological and behavioural processes that leads to speciation in living organisms.
Geographical isolation refers to the separation of organisms of the same species in terms of physical geographical features such as distance, mountains, water bodies, etc. The separation causes each group to take different adaptive paths, eventually leading to speciation, that is, they become separate species.
In this case, the small population of monkeys in the isolated forest must have been geographically isolated from their counterparts in some ways back. They took a different adaptive path from the larger group as a result of geographical difference and eventually became a new species.
The absence of which of these will not affect photosynthesis is - oxygen, Carbon dioxide, water, Chlorophyll, light. Give reason
Answer:
Oxygen
Explanation:
Oxygen is the by product of photolysis during photosynthesis whereby water molecules are split to form protons (H+ ions), electrons and oxygen (by product).
Oxygen is not needed during any of the reactions in photosynthesis and Calvin cycle and will not affect the rate of photosynthesis or possibility of photosynthesis occurring. However, it will affect the process of aerobic respiration instead.
Carbon dioxide is needed in carbon fixation during the Calvin cycle. Without it, 6 carbon sugars cannot be formed.
Water is needed for photolysis to produce protons (maintain the electrochemical gradient) and electrons (to replenish lost electrons)
Chlorophyll are pigments that harvest light energy to excite electrons produced from photolysis of water to be passed down the electron transport chain.
Light is needed as a source of energy to energise the electrons
Arrange the following substances in order of increasing tendency to donate electrons
with reasons:
α –ketoglutarate, Oxaloacetate, O2, NADP+
, Malate
Answer:
α- ketoglutarate → NADP+ → Oxaloacetate → O2.
Explanation:
The ability of an molecule or a compound to donate or accept electron can be related to their electron affinity.
The more positive the electron affinity is ; the more likeliness such compound is known to be as an electron acceptor which accepts . Also the less positive the electron affinity is the more likeness such compound will be known to be as an electron donor which donates electron
The electron affinity of a compound to accept or donate electron can be related to their reduction potential value (Redox Value).
From the information given ; we have α –ketoglutarate, Oxaloacetate, O2, NADP+ and we are to arrange in an increasing tendency to donate electrons.
i.e from the least tendency to donate electron to the highest tendency to donate electron.
The reduction potential value (Redox Value) of the compounds and molecule given are:
α –ketoglutarate ---> - 0.38 since α- ketoglutarate will react with CO2, it gives isocitrate
Oxaloacetate ----> - 0.18 since Oxaloacetate will react with two moles of hydrogen ion and electrons respectively to give Malate
O2 ------> + 0.82 since O2 will react with 4 moles of hydrogen ion and electrons respectively to give 2 moles of water
NADP+ ------> - 0.32 since NADP+ will react with two moles of electrons and one mole of hydrogen ion to give NADPH
Again; lets recall the less positive the electron affinity is the more likeness such compound will be known to be as an electron donor which donates electron.
So to arrange the given substances in order of increasing tendency to donate electrons since we've known their standard reduction potential value (Redox Value); we have the increasing order as:
α- ketoglutarate → NADP+ → Oxaloacetate → O2.
You are a brilliant student who has discovered a new genetic disease identified by the absence of a key enzyme involved in the Krebs cycle. You work diligently to discover that the missing enzyme is produced in the cytoplasm as a zymogen, but does not get to its correct location in the mitochondria. What is the problem
The given question in incomplete, the complete question is:
You are a brilliant student who has discovered a new genetic disease identified by the absence of a key enzyme involved in the Krebs cycle. You work diligently to discover that the missing enzyme is produced in the cytoplasm as a zymogen, but does not get to its correct location in the mitochondria. What is the problem?
Group of answer choices
the signal peptide on the N-terminus of the protein may be incorrect or missing
the functioning of the Krebs in the matrix
enzymes allow some reactions to occur but not others
dephosphorylation did not occur
Answer:
The correct answer is that on the N-terminus of the protein the signal peptide may be missing or incorrect.
Explanation:
The metabolic reactions of several enzymes that take place within the mitochondria are generated with the assistance of genes produced within the nucleus. The translation of these gene products takes place within the cytoplasm and is targeted towards the mitochondria.
In case, if a flaw is witnessed at the time of targeting towards the mitochondria, the protein would stay within the cytoplasm and will not move forward. Therefore, error in the signal peptide would be the correct option.
The inheritance pattern of a recessive maternal effect gene in Drosophila. In maternal effect, the offspring’s phenotype is under the control of nuclear gene products present in the mother's egg. In this example, the presence of the a + allele in the mother is required for proper wing development in the offspring. In the pedigree, individuals who are wingless are indicated by a shaded symbol. The phenotypes and genotypes are only provided for the first generation (individuals 1 and 2).What are all the possible genotypes for individual 1's mother?
1. mom-a/a dad-a+/a
2. offspring: a+/a or a/a
1. a +/a +
2. a +/a
3. a/a
Answer:
m,m
Explanation:
Which option uses the monitoring method to check the growth of invasive species?
a. Digging of the species
b. Tilling the land
c. Spraying pesticide
d. Cleaning of ship ballast
Answer:
The answer is A
Explanation:
Invasive species are species that thrive unregulated in an introduced environment/ habitat and affect the biodiversity of the environment. They boom unchecked mostly due to lack of a natural predator. Therefore, introducing a predator will limit their growth.
The option that uses the monitoring method to check the growth of invasive species is digging of the species. Thus, the correct option is A.
What are Invasive species?Invasive species may be defined as those species of organisms that cause ecological or economic threats in a new environment where it is not native.
The invasive species harm the biodiversity of new habitats significantly. In order to prevent this, the specific predators of such species are introduced.
The process of digging of the species also helps in monitoring the growth of invasive species.
Therefore, the correct option for this question is A.
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Which of the following contains the genetic code for protein synthesis?
Answer:
Explanation:
Genetic code The number of nucleotides that are responsible for the formation of the amino acid code Protein synthesis First: Translation process Second: Polypeptide elongation Third: Stop of protein synthesis
What are the short term effects of global warming?
Answer:
Short term effects of global warming are:
Abnormally warm temperatures in the Winter and Summer months in various areas of the planet (actually throughout the year, but most easily contrastable in those seasons)
Deaths of certain forms of life that are not as adaptable to such temperature changes
Increases in glacial and ice cap melting, producing increases in sea level
Deaths of certain forms of life due to high temperatures such as coral, which can only survive in certain pH levels, which changes in the sea as more fresh water is introduced into the oceans due to Arctic/Antarctic ice melting
Increases in the severity of certain storm patterns (such as tropical cyclones) and even local weather patterns
Increases in drought conditions in various areas
Explanation:
Also, forest fires.
True or False?
Diatoms lack a flagellum.
Answer:
True
Explanation:
Diatoms are unicellular (one celled) algae. They undergo photosynthesis to produce their own food. They are found in many different marine and aquatic environments and ecosystems.
Diatoms do not move. They don’t have cilia or flagellum, which would allow them to move around and swim.
Therefore, it is true that diatoms lack a flagellum.
What is the issue with Venus’ fluffy little clouds?
Answer:
So, once the oceans evaporated, the carbon problem on Venus became even worse with nothing to sequester it. Over time, the water vapor in the atmosphere got hit by enough sunlight to break it apart, sending the hydrogen into space, with all that mass being replaced by carbon dioxide rising up out of the surface.
Explanation:
2. Which is the most common type of muscle in the body?
smooth
skeletal
cardiac
Answer:
skeletal
Explanation:
Kant's famous First Formulation of the Categorical Imperative reads:Act only according to that maxim whereby you can at the same time will that it should become a universal law. Kant taught morality as a matter of following maxims of living that reflect absolute laws. "Universal" is a term that allows for no exceptions, and what is universal applies always and everywhere.Lying, for any reason, is universally wrong. Be sure to listen to Kant's audio lecture before posting this week! So, consider the famous case of the Crazed Murderer. In your town the Crazed Murderer comes to your door looking for your friend and wanting to kill him.You know that your friend went home to hide. What do you tell the murderer? When he leaves and runs up the street to your friend's house, what do you do?
Answer:
Universal laws are the ethics that guide the behavior of humankind. These laws are universally accepted by all humans and are followed by them in their daily lives. Law of attraction, the law of vibration, is some of the examples of universal law.
Explanation:
Kant believed that telling a lie is wrong, and murdering a human is a crime. All humans should follow these two principles. Keeping in mind the words of Kant, in the given situation, I will not tell the murderer about the exact location of my friend. I will not remain silent also because that crazy man could kill me too. Instead of telling him the right directions, I will tell him the wrong directions and will send him to the wrong place so that he would not harm my friend and me. Though telling a lie is wrong but saving two lives will be more important to me in this situation.
As soon as the murderer leaves, I will call the police and will tell them the direction in which the murderer has gone. This will save me as well as my friend's life, and the murderer will also get punishment for his sin.
Hope this helps!!
What characteristics does a crystalline polymer exhibit?
a) Thin platelets are surrounded by amorphous regions.
b) Thin platelets with chain folds at the faces
c) They are optically transparent.
d) The boundary between thin platelets define the boundary between crystal regions.
Answer:
B) Thin platelets with chain folds at the faces
Explanation:
Crystalline polymer is folding together of molecular chain in an ordered way to form lamella. Polymer crystallize after cooling from evaporation of solvent. It affects the properties of the polymer such as thermal property.
Polymer on freezing becomes disorder forming an amorphous solid.
Single Antigen, Multiple Organs Some Type-II immunopathology mediated autoimmune diseases have manifestations in multiple different organs. Discuss how antibodies to one single antigen can cause damage in multiple sites throughout the body. Things you might discuss include, but are not limited to where the antigen could be expressed, how antibodies are made, how they bind antigen, where they circulate, the ratios of antigen to antibody, mechanisms of the immune system that result in cellular/tissue damage, or how immune system components can affect other organs. You might also comment on what makes one antigen an attractive target rather than another. Please do NOT comment on all the things listed above, they are just to get you thinking. If you are having trouble getting started, it might help to think about a specific disease which affects multiple organs... Good Luck!
Answer:
Adaptive immune responses are triggered by activation of antigen-specific T cells that produce antibodies against foreign antigens such as, for example, harmful viruses. These immune responses are useful to eliminate dangerous molecules from the body. In a normal immune reaction, the antibodies produced by T-cells target antigen molecules in order to be subsequently absorbed by phagocytic macrophage cells.
Autoimmune diseases are triggered by the response of the adaptive immune system against self-antigen molecules. Since the immune system can not eliminate antigens from the own body, this immune reaction generates an excessive inflammatory response, and it may lead to the damage of tissues and organs.
Species 1 is described as 2n = 8 and has chromosome composition BBDDEEHH.
Species 2 is described as 2n = 10 and has chromosome composition NNPPSSXXZZ.
Select the best answer to classify the organism below based on its chromosome composition. Note that each letter represents a chromosome and that the organism below is either an individual from one of the species above or is derived from one or both species above.
Organism: NNPPPSSXXZZ
Select one:
a. Trisomic
b. Autotetraploid
c. Haploid
d. Autotriploid
e. Diploid
f. Allotriploid
g. Double Trisomic
h. Monosomic
i. Nullisomic
j. Double Monosomic
k. Allotetraploid
Answer:
a. Trisomic
Explanation:
A trisomy is a genomic phenomenon whereby a particular chromosome is present in three copies. In this case, the trisomy involves the chromosome P, being this species a tetraploid with 5 pairs of homologous chromosomes (2n = 10). In humans, the trisomy for chromosome 21 is one of the most common types of aneuploidies that lead to the Down syndrome by producing alterations in gene expression patterns that are associated with changes in the phenotype
How do scientists provide solutions for many of the world's problems? A. Through the use of politics B. By keeping their research a secret C. By having more conferences D. Through the use of technology
Answer:
D. through use technology
What causes leaves to dry out
Answer:
Lack of moisture – Papery leaves on plants are often caused by leaf scorch. .
Excessive moisture – Leaf scorch can also be attributed to too much moisture. This occurs when the soil is so wet that the roots are deprived of oxygen. As the roots smother, the leaves turn dry and papery and the plant eventually dies.
Explanation:
Answer:
Lack of moisture, Excessive moisture, fungi, Excessive fertilizer, and water quality
Explanation:
All to name a few
Selective breeding of individuals with similar traits to produce genetically similar offspring is called __?
Answer:
artificial selection
Explanation:
Selective breeding, also known as artificial selection, is a process used by humans to develop new organisms with desirable characteristics. Breeders select two parents that have beneficial phenotypic traits to reproduce, yielding offspring with those desired traits
What is the utilized equipment for studying fluorescence-labelled cells? What are the advantages of labelling the cells?
Answer:
Fluorescent labeling of cells helps in ensuring more visibility of the properties of the cell.
The equipment used in studying fluorescence-labelled cells include epi-fluorescence microscope which helps in providing a more dimensional view of the cells. The spectrophotometers is also used to determine the chemical properties of the cells through the intensity of light measured with this equipment. The flow cytometer is also used in this process.
a. What are general/biological functions of proteins in human body/cells/organism?
b. What is the building block of proteins? Draw the general structure of this building block and write the names of functional groups in the structure?
Answer:A) proteins are useful as enzymes, hormones etc.
B) the building block of protein are amino acids
Further explanation below
Explanation: A) proteins are polymers formed by several chains of amino acids. They occur in living tissue and form 50 -- 60% of the total dry mass of the living cell. Proteins found in the membrane are used as structural integrity. Some proteins are catalytic in nature and are such are used as enzymes. They also occur as hormones. Proteins help in the transport of substances across the cell membrane, when they are found in the cell membrane.
B) the building block of protein are amino acids. They undergo condensation reaction to form proteins.
The structure of amino acid is in the attached photo.
R = the group that determine the name of the amino acid. It may be a hydrogen atom,an alkyl, an aryl, or carboxyl group.
H2N = the amino group
COOH = the carboxyl group
C = the alpha central carbon to which other groups are attached.
n
Question 4
1 pts
Cholesterol is made by the liver. It is a precursor to sex hormones and vitamin
D. It is also a part of our cell membranes. Cholesterol is
not an essential nutrient
an essential nutrient
O it depends on your medical conditions
O is essential to only vegans
Next >
< Previous
Answer:
an essential nutrient
Explanation:
cholesterol is a needed nutrient in the body
How is the circulation of a fetus different from the circulation of a baby?
A. The fetus has blood with no oxygen in it.
B. The fetus does not pump blood throughout its body.
C. The fetus does not use its lungs to bring oxygen to the blood.
ENESTE
O
D. The fetus breathes carbon dioxide instead of oxygen.
Answer:
The fetus does not use its lungs to bring oxygen to the blood.
Answer:
The fetus does not use its lungs to bring oxygen to the blood.
What is in the cloud of negatively charged particles that surrounds an atom?
O A. Neutrons
B. Protons
C. Proteins
O D. Electrons
Answer:
electrons
Explanation:
bc i know big brain stuff
Answer:
D
Explanation:
We are looking for a negatively charged particle that is part of the cloud around an atom. Let’s analyze each answer choice.
Neutrons are neutral, and they have no charge. Therefore, A is incorrect.
Protons have a positive charge, so B is also incorrect.
Proteins are not part of the atom or in the cloud that surrounds one, so choice C is wrong as well.
Electrons are negatively charged, and they are in the cloud that surrounds an atom. Therefore, D. Electrons is correct.
Pretend that you are a doctor and you read your patient’s blood test results. You notice that the patient’s leukocyte levels have increased. What will be your conclusion?
Answer:
This is an indication of immune response to a particular infection.It shows that the WBC are fighting against certain infections which may have entered the host(patient).In some cases, when an individual engaged in physical stress or disturbed emotionally, The WBC level may also rise.
Explanation:
what happens when someone drinks chromyl chloride
Answer:
Explanation:
The high chlorine rates destroy intestinal flora, which can inhibit the ability of your digestive system to effectively absorb and process nutrients. As a result, your body might not absorb and benefit from the minerals, vitamins and fats that you take in, thus making the body more vulnerable to infections.
The presence or absence of horns in ruminant livestock species is determined by the polled gene. The polled allele (P) is dominant to the horned allele (p). What genotype(s) would result in an animal being polled (having no horns)?
Answer:
PP and Pp
Explanation:
The dominant allele "overpowers" the recessive allele, therefore that trait shows. In this case, it is the polled allele. Therefore, the heterozygous pair works. Also, the homozygous pair with only the dominant allele (polled) will of course work since that is the only gene.
The genotype(s) would result in an animal being polled (having no horns) is PP and Pp.
An organism's genotype is made up of all of its genetic components. The alleles or variations that an individual possesses in a certain gene or genetic region are also referred to as the genotype.
The genotypes that encode for the polled allele are PP or Pp because the polled gene (P) is dominant over the horned gene (p). Because both of these alleles must be recessive in order for the horned allele to be expressed, the genotype that will carry it is pp.
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Which machine would you use to apply a chemical solution on mango fruits which have been infested by fungi
Answer: an ink machine
Explanation:
A researcher found a method she could use to manipulate and quantify phosphorylation and methylation in embryonic cells in culture. In one set of experiments, she succeeded in increasing acetylation of histone tails in the chromatin of the cells. Which of the following results would she most likely see in these cells?
a. activation of histone tails for enzymatic function
b. decreased binding of transcription factors
c. increased chromatin condensation
d. inactivation of the selected genes
e. decreased chromatin condensation
Which of the following is a side effect of heat islands?
Drought
Increased precipitation
Lower temperatures and drought
Lower temperatures
Answer:
Drought is a side effect of heat islands
Which question about whale sharks is nonscientific?
Answer: c
does a whale shark like having a large mouth?
Explanation:
