Answer:
helps us understand more about the universe
Bacterial infections have become much more of a threat to human health due to which of the following?
A. an increase in acquired antibiotic resistance by innocuous strains
B. horizontal transfer of pathogenicity
C. an increased use of antibiotics, horizontal transfer of pathogenicity, and an increase in acquired antibiotic resistance by innocuous strains the increased use of antibiotics
D. an increased use of antibiotics coupled with an increase in acquired antibiotic resistance by innocuous strains
Answer:
C
Explanation:
Infections caused by bacteria have become much more of a threat to human health due to increased use of antibiotics, horizontal transfer of pathogenicity, and an increase in acquired antibiotic resistance by innocuous strains due to the increased use of antibiotics.
Increased and unregulated use of antibiotics has led to the development of antibiotic resistance by different bacterial strains as a result of evolution by natural selection. The unregulated use of antibiotic act as a selection pressure on the bacterial population. Those that are naturally able to withstand the presence of antibiotics are selected for and the weak individuals gradually fade off from the population, leaving the strong, antibiotic-resistant ones behind.
The potential of bacterial strains to also transfer transposable genetic elements horizontally from one individual to another could make bacteria that are non-virulent before to become virulent.
Correct option: C.
HELPPPP (25 points)
Identify this
i need help.. kinda hard but 30 points.. will give brainliest
Answer:
I hope this helps u
Explanation:
1- a. natural law means a law which exists naturally by nature and is not created by the human beings
b. theory is a bunch ideas linked to together in way so that it explains something.
2- Objective lens are important as it helps In gathering the light and produces a focus to properly focus on the speciman.
SORRY IF IT NOT GOOD ENGLISH IS NOT MY FIRST LANGUAGE
What does it mean for an environment to be isotonic?(1 point)What does it mean for an environment to be isotonic?(1 point) The concentration of solute in the environment is different from the concentration inside the cell. The concentration of solute in the environment is equal to the concentration inside the cell. The concentration of solute is greater in the environment than inside the cell. The concentration of solute is greater inside the cell than in the environment.
Answer:
The correct answer is : The concentration of solute in the environment is equal to the concentration inside the cell.
Explanation:
Isotonic environment is an environment the amount of solute concentration is equal on both side of the semipermeable membrane or the cell. in such condition there would be no water movement towards particular direction or will take place and as there is no water movement so there would be no change in shape or size of the cell. The osmotic pressure in an isotonic environment would be same on both side of the membrane.
Thus, the correct answer is : The concentration of solute in the environment is equal to the concentration inside the cell.
A population _____ follows a period of _____. decline; overshoot increase; overshoot increase; scarcity scarcity; dieback
Answer:
Hey there!
A population increase follows a period of scarcity.
With more people, the food and water resources get scarce, and isn't always enough for everyone.
Let me know if this helps :)
(iii) List TWO structural differences between this polysaccharide and glycogen.
[2 marks]
Answer:
Cellulose, starch, and glycogen are all polymers of glucose, but differ in form and function because of the optical isomer involved, the length of the polymers, and the degree of branching.CELLULOSE is an unbranched, long chain glucose polymer held by ß-1,4 glycosidic bonds. The straight, tightly packed chains give cellulose high tensile strength and resistance to hydrolysis.
STARCH is a mixture of two polysaccharides: amylose (unbranched with alpha-1,4 glycosidic bonds) and amylopectin (branched with alpha-1,6 glycosidic bonds). The alpha-1,4 glycosidic bonds and more branched nature of starch account for ith physical properties; starch is powdery and more easily hydrolyzed than cellulose, which exists as tough microfibrils.
GLYCOGEN, like starch, is a branched polymer. It is similar to amylopectin, being composed of alpha-glucose molecules, but it is larger and there are more alpha-1,6 links. This makes it highly branched, more soluble, and more easily hydrolized than starch.
Please mark brainliest!
Answer:
polysaccharides have coil and long branch while glycogen has short chain.
Explanation:
polysaccharides have coil and long branch while glycogen has short chain.
PLS HELP ME QUICK!!!!
Figure (13) shows the digestive system with parts
labelled as A, B, C, D and E.
a) Identify the parts where digestive juices are
not produced.
b) What is the substance in C which helps the
digestive juices to act? Digestion of which
component of food happens here?
c) What is the function of part E?
d) In which part does digestion of food
complete?
e) Name the gland present just below part C.
What is its function?
HELP ME IN THIS QUESTION PLS!!
Answer:
a) esophagus and intestines
b) the acid in the stomach helps the digestive juices to act by making the medium in the stomach acidic
c) it helps in getting rid of waste substances(water,bile pigments and sloughed off cells) and bacteria
d) colon
e) pancreatic glands
it produces juices that help breakdown food and hormones that controls blood and sugar levels
Explanation:
Who were the scientist who discovered the plasmid PB322?
A) Rodriguez & beliver.
B) Joller smith.
C) Herbert boyer.
D) Stanley cohen & joller smith.
Answer:
c) Herbert Boyer
Explanation:
In the Landolt-C acuity test, the average threshold for accurately identifying the position of the gap in the C-like character was 0.75mm in size, at a distance of 3000mm. What angle is subtended by the gap at this acuity threshold? Show your working and give your answer in Minutes of arc.
Answer:
0.859 minutes of arc
Explanation:
The arc length for a given radius and angle in radians is ...
s = rθ
So, the angle is ...
θ = s/r
For the given geometry, the angle in radians is ...
θ = (0.75 mm)/(3000 mm) = 0.00025 radians
In minutes of arc, this is ...
(0.00025 radians)(60 minutes/degree)(180 degree/(π radians)
= (0.0025)(60)(180)/π minutes
≈ 0.859 minutes
The angle subtended is about 0.859 minutes of arc.
Need Help!!! 30 points! You are monitoring coral growth on a specific site for several months. Over time, you notice that some of the coral colonies are beginning to turn white and die. What process could you infer is happening on the coral reef site?
(A) The coral reef is experiencing succession, so over time the coral will continue to die off gradually as the zooxanthellae algae leaves the coral polyps.
(B)The coral reef is experiencing succession, so the coral will continue to die off quickly as the zooxanthellae algae leaves the coral polyps.
C) The coral reef is experiencing climate change, so the rise in ocean temperatures is causing the coral to bleach as the zooxanthellae algae leaves the coral polyps.
(D) The coral reef is experiencing climate change, so the coral will die off from seasonal variation, which has no impact on zooxanthellae algae in the coral polyps.
Answer:
B) The coral reef is experiencing succession, so the coral will continue to die off quickly as the zooxanthellae algae leaves the coral polyps.
The coral reef is experiencing succession, thus as the zooxanthellae algae departs the coral polyps over time, the coral will continue to gradually die off. Therefore, option (B) is correct.
What is succession in coral reefs?When several living things in a particular area undergo succession, it doesn't matter what time of year it is. The destruction of a portion of a shallow reef by a boat might be one of the numerous instances of succession in coral reefs seen all over the world.
Since the coral reef is undergoing succession, when the zooxanthellae algae leave the coral polyps, the coral will continue to quickly decline. The coral is bleaching as the zooxanthellae algae leave the coral polyps as a consequence of climate change harming the coral reef. Seasonal changes will cause the coral to die off since the coral reef is experiencing climate change. The coral polyps' zooxanthellae algae are unaffected by this.
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You are studying a population of ground squirrels. You trap 100 individuals and find 9 that have a light colored coat, and the rest have a dark coat. You know that light coat color is recessive in ground squirrels. Assume HWE.
The question is incomplete. Here is the complete question.
You are studying a population of ground squirrels. You trap 100 individuals and find 9 that have a light colored coat and the rest have a dark coat. You know that light coat color is recessive in ground squirrels. What is the allele frequency for the light coat allele and the dark coat allele? How many of the dark coated individuals do you expect to be heterozygotes at the coat color gene? Assume the population is at H-W equilibrium.
Answer: Allele frequency for light coat: q = 0.3;
Allele frequency for dark coat: p = 0.7;
There will be 42 heterozygote;
Explanation: A population in H-W equilibrium is a population which doesn't change from one generation to the next if there are no disturbing factors, as migration or mutation.
It follows the equation: [tex]p^{2}+2pq+q^{2}=1[/tex].
p represents the frequency of the dominant allele;
q represents the frequency of the recessive allele;
2pq represents heterozygote individuals;
The sum of frequencies of both alleles must be 1, i.e.: [tex]p+q=1[/tex]
For the population of squirrels:
Frequency of recessive allele[tex]q^{2} = \frac{9}{100}[/tex]
[tex]q = \sqrt{\frac{9}{100}}[/tex]
q = 0.3
Frequency of dominant allele[tex]p+q=1[/tex]
[tex]p=1-q[/tex]
[tex]p=1-0.3[/tex]
p = 0.7
Frequency of heterozygote2pq = 2*0.7*0.3 = 0.42
In a population of 100 individuals: 0.42*100 = 42
The allele frequency for the light coat is 0.3; for the dark coat is 0.7.
It is expected to have 42 heterozygote individuals in this population.
What would you think would happen if you reduce the incubation time to 30 minutes?
Answer:
Enzymatic activities is usually efficient when it happens at an optimum temperature. This temperature aids its proper functioning and too much of heat could as well denature the enzyme.
When you reduce the incubation time of an enzyme to 30 minutes , the enzyme may or may not have enough time to reach the amount of free energy needed to drive the enzymatic reaction.
For a species with four pairs of chromosomes, ________ gametic combinations are possible.Group of answer choices
Answer:
16
Explanation:
For a species with four pairs of chromosomes, 16 gametic combinations are possible.
This is calculated by using the formula 2n
A normal human has two pairs of chromosome which calculated by 2*2=4 to give the possible gametic combinations. However in the case of 4 pairs of chromosomes it is calculated by 2*2*2*2= 16 possible genetic combinations.
an insect population is growing in such a way that the number in each generation is approximately 1.5 times that of the previous generation. if there are 100 insects in the first generation, approximately how many insects will there be in the fourth generation
Answer:
Approximately 338
Explanation:
Since each generation of the insect is approximately 1.5 times that of the previous generation. Therefore,
Population of insect in the first generation = 100
Population of insect in the second generation = 1.5 × 100
= 150
Population of insect in the third generation = 1.5 × 150
= 225
Population of insect in the fourth generation = 1.5 × 225
= 337.5
The population of insect in the fourth generation is approximately 338.
Complete the sentences by matching the names of trees to the appropriate blanks. To do this, drag the names on the left into the appropriate blanks in the sentences on the right.
Match the words in the left column to the appropriate blanks in the sentences on the right. Terms may be used more than once.
cedar mango elm maple pine
1. Evergreens are plants that maintain their leaves in all seasons and include trees such as _________, _________ , and _________.
2. Deciduous trees lose their leaves seasonally and include trees such as _________ and _________.
3. Hardwoods reproduce using flowers and have broad leaves: hardwoods include trees such as _________, _________ , and _________ .
4. Conifer leaves are generally thin and needle-like, while seeds are contained in cones. Conifers include _________ and _________ .
Answer:
1. cedar, elm and pine
2. Mango and maple
3. elm, maple, and Mango
4. cedar and pine
Explanation:
1. Evergreen planst are those plants that has leaves throughout all the seasons and example of evergreen trees are cedar, elm and pine.
2. Deciduous trees are the trees that shed their leaves seasonally and inlcude trees such as mango and maple.
3. Hardwood is related to the dicot trees having broad leaved temperate and include trees such as elm, maple, and Mango.
4. Conifers are the vascular land plant having thin and needle like leaves and include cedar and pine.
Hence, the correct answer is:
1. cedar, elm and pine
2. Mango and maple
3. elm, maple, and Mango
4. cedar and pine
5) The troposphere of the Earth's atmosphere supports life because it contains
A. Water, oxygen, carbon dioxide, other greenhouse gases
B. Water, nitrogen, helium, and argon
C. Water, oxygen, carbon monoxide, methane
D. Water, nitrogen, oxygen, carbon monoxide
Answer:
I think its A
Explanation:
Because the reason why airplane have closed windows is because we can't breathe in carbon dioxide when we go up. Of course there is oxygen just not a lot as we go up. Why would there be helium in the air? We would sound weird when we skydive.
Which of the following is the MOST complex?\
A.Eukaryotic Cell
B.Prokaryotic Cell
C.Ebola
D.Virus
Answer: Hi!
Your answer would be a), eukaryotic cells. We should automatically know that prokaryotic cells are less complex than eukaryotic cells. However, the last two options, Ebola and Virus, are both viruses. Viruses are not considered living and they don't really do anything besides replicate, which they need living cells to do. On the other hand, Eukaryotic cells have organelles, a nucleus, etc. They are definitely classified as living, and complex!
Hope this helps!
The most complex cell is eukaryotic cells. Therefore, option (A) is correct.
What is a eukaryotic cells?Organelles that are membrane-bound and found in eukaryotic cells include the nucleus, mitochondria, and endoplasmic reticulum. Protozoa, fungi, plants, and animals are examples of eukaryotic cell-based organisms. The biological domain Eukaryota is where these species are categorised. Eukaryotic cells are bigger and more sophisticated.
Organelles found in eukaryotic cells conduct a range of tasks inside the cell (described in detail, below). The cytoskeleton, which is also important in relaying signals from one area of the cell to another, stabilises and physically supports each organelle. Microtubules, microfilaments, and intermediate filaments make up the majority of the cytoskeleton in eukaryotic cells. Cytosol is the name given to the liquid that covers every cell organelle.
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O blood is recessive to AB blood. What possible blood types could result from parents with O and AB Blood?
Answer:
Parents having blood type AB and O can produce offsprings having blood group A or Bbut not O
Explanation:
The possible blood type that could result in the offspring is it can be either A or b but not O as O is recessive.
What is blood?Blood is defined as a fluid that distributes oxygen and nutrients to cells while also removing carbon dioxide and other waste materials.
There are three types of blood cells.
RBC - RBC stands for red blood cells. They are defined as a kind of blood cell present in the blood that is produced in the bone marrow. WBC - WBC is also called white blood cells. They are defined as a kind of blood cell present in the blood and lymph tissue that is produced in the bone marrow.Platelets - Platelets are defined as the cells that circulate in our blood and link together when they detect damaged blood arteries.Thus, the possible blood type that could result in the offspring is it can be either A or b but not O as O is recessive.
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During the formation of a feather, a tube-like _____ appears as a result of early induction events within the dermal layer of the wing surface.
Answer:
During the formation of a feather, a tube-like __FOLLICLE___ appears as a result of early induction events within the dermal layer of the wing surface.
Explanation:
2. What purpose does fat serve in the body?
Explanation:
fat give your body energy and to help cell growth and helps your body warm
Which properties of systems does a robot have? Which does it not have?
Answer:
Physical structure, movable and brain.
No feelings and no reproduction.
Explanation:
A robot have the following properties of systems such as they have a physical structure which helps them to move from place to place. They also have a sensor system which detect any change in the environment, a power supply which helps them for doing different activities and a computer brain which control all the activities. A robot does not have any feelings such as pain, happiness etc because it is a machine and inability to reproduce like humans.
The amount of energy available in a particular ecosystem is most closely linked to what?
Answer: b
Explanation:he amount of energy available in a particular ecosystem is most closel
What amino acids do trypsin and chymotrypsin cut at?
Answer:
Trypsin cuts at lysine and arginine amino acid residues at the carboxyl end. Chymotrypsin cuts at tryosine , phenylalanine, and tryptophan amino acid residues at the carboxyl end.
Explanation:
Trypsin and chymotrypsin are known as proteolytic enzymes which are actively involved in the digestive system. They are both secreted by the pancreas and are majorly involved in the breakdown of protein in the small intestine.
Trypsin cuts at lysine and arginine amino acid residues at the carboxyl end. Chymotrypsin cuts at tryosine , phenylalanine, and tryptophan amino acid residues at the carboxyl end.
When cleaning a blur use cloth towels instead of paper towels
Answer:
yes that is better for the environment and more efficient
Explanation:
n
photosynthesis needs a supply of CO2, H2O and sunlight. Wher do these resources come from?
Answer:
CO2 = Humans
H2O = Soil
Sunlight = Sun
Explanation:
Plants get CO2 from humans after respiration has occurred . The take the carbon that humans breathe out from the atmosphere.
Plants get H2O from the soil. The plants root absorb the water in the soil.
Plants get sunlight from the sun. Sun rays are used by plants to go through the process of photosynthesis.
Answer:
Carbon dioxide and water are released during respiration and used by plants during photosynthesis and sunlight is obtained from the sun.
Explanation:
Photosynthesis and respiration are the two processes that take place simultaneously and take the products of each other as their reactants.
Homer notices that his shower is covered in a strange green slime. His friend Barney tells him that coconut juice will get rid of the green slime. Homer decides to check this this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the appearance of the green slime on either side of the shower. Group of answer choices Control Group [ Choose ] Independent Variable [ Choose ] Dependent Variable [ Choose ] Constant [ Choose ]
Answer:
The requirements in the question are not clear enough, fortunately, I found a matching complete question:
Homer notices that his shower is covered in a strange green slime. His friend Barney tells him that coconut juice will get rid of the green slime. Homer decides to check this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of "treatment", there is no change in the appearance of the green slime on either side of the shower.
1. What was the initial observation?
Identify the-
2 Control Group
3 Independent variable
4 Dependent variable
5. what should Homer's conclusion be?
Answer:
1) initial observation: growth of a strange green slime in the shower
2) Control Group: Half of the shower that was sprayed with water
3) Independent variable: volume of coconut juice sprayed
4) Dependent variable: disappearance of the green slime
5) spraying coconut juice is not effective when trying to get rid of slime in the shower after 3 days
Explanation:
The question wants to test your ability to interpret an experiment and identify the various components in an experimental design. Hence, I will explain the major concepts found in en experimental design:
Initial observation: These are the factors that precede the initiation of an experiment, and it is what the experiment seeks to change or support. In this case, the observation of slime in Homer's bathroom initiated the experiment.Control Group: The control group in an experiment is the group that does not receive treatment or intervention by the researcher, and serves as a benchmark for measuring the change occurring in the treatment group. In this example, the half of the bathroom sprayed with water, did not receive any intervention which is spraying with coconut juice. Independent variable: These are the variables that are completely under the control of the researcher and can be varied at will. The volume of coconut juice sprayed is completely under Homer's cntrol.Dependent variable: The dependent variable is the variable that changes or is expected to change as a result of the changing of the indepenedent variable. The outcome is outside the control of the researcher. Here, the disappearance of the slime is the dependent variable, because it depends on the spraying of coconut juiceConclusion: The conclusion is a statement made as a result of the observed results of the experiment. In this case, there was no change on the slime in the bathroom after three days of spraying with coconut juiceIf you use a cladistic approach (organizing taxonomic groups by clades) in grouping organisms together, the resulting classification scheme:
Answer:
The classification scheme is ancestor.
Explanation:
In cladistic approach is a type of classification in which organisms are classified on the basis of their common ancestor. Those organisms are placed in one group which have common ancestor and share same characteristics or which are evolved from a common ancestor. With the passage of time changes occurs within the body of organisms so these organisms are different from one another in physical structure but have a common ancestor.
Organisms that live in freshwater and marine biomes have developed unique adaptations that aid in their survival. Which of the following adaptations would be the most beneficial to wading birds?
a.
dense feathers
b.
webbed feet
c.
long, light legs
d.
waterproof feathers
Please select the best answer from the choices provided
A
B
C
D
Answer:
its c
Explanation:
The adaptations would be the most beneficial to wading birds long, light legs.
What is adaptation?The biological process by which organisms adapt to new environments or modifications in their current environments is known as adaptation in evolutionary theory.
Even though adaptation was a topic of discussion among scientists before the 1800s, Charles Darwin and Alfred Russel Wallace did not create the theory of natural selection until then.
Wallace thought that adaptation of organisms to shifting environmental conditions was somehow related to the evolution of species. Wallace and Darwin both went beyond basic adaptation when formulating the notion of evolution by natural selection by describing how organisms adapt and evolve.
Therefore, The adaptations would be the most beneficial to wading birds long, light legs.
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g Describe the structure of Hemoglobin. Does the binding of oxygen involve the direct interaction with the polypeptide chain
Answer:
Hemoglobin is an iron-containing protein present in the blood that functions for transportation of oxygen to different body cells..
Each hemoglobin molecule have tetrahedral structure consist of four heme groups surrounded by a globin group. Heme, is composed of porphyrin (ringlike organic structure) which is attched to an iron atom. There are four iron atoms in each molecule of hemoglobin that binds with four oxygen atoms and globin carry two linked pair of polypeptide chain.
The oxygen reversibly binds with the polypeptide chain and the process called oxygenation.
What are the three parts that make an amino acid?