Answers
The water in a lake is not safe for drinking, high turbidity levels in the lake Coliform bacteria occur innately in soil and in the intestines of humans and other organism.
What is dissolved oxygen in water?Dissolved oxygen (DO) is the quantity of oxygen that is current in water.
Water bodies obtain oxygen from the atmosphere and from aquatic plants.
Rushing water, such as that of a fast moving stream, dissolves more oxygen than the still water of a pond or lake
Thus, option "D" is correct, high turbidity levels in the lake.
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Related Questions
what are the components of the atmosphere that help organisms live on earth?
EXPLAIN and I will make you brainliest!!!
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Answer: Atmospheric gases, especially carbon dioxide (CO2) and oxygen (O2), are extremely important for living organisms. Carbon dioxide and oxygen are the gases in the atmosphere that are needed for life. Plants need carbon dioxide for photosynthesis. They use sunlight to change carbon dioxide and water into food. The process releases oxygen
Explanation:
How much time does it take to use 300 W of power to do 1800 J of work? Round your answer to the near
number.
SERE
The time is
S.
Answers
Answer:
the answer is 6 secs rounded to nearest ten is 10
Explanation:
hope it helps
PLZZZ!!! I promise to give brainliest to whoever can help me T^T
3. What do fossils teach us?
4. are transition fossils important for proving evolution?
5. What can scientists assume about individuals with similar anatomy?
6. Compare and contrast homologous and analogous structures?
7. What do vestigial structures teach us?
8. What can scientists assume about species with similar embryos?
9. What is biogeography and why is it important for proving the theory of evolution?
10. Describe one area where microevolution can be observed today
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3. Fossils give us information about how animals and plants lived in the past. Some animals and plant are only known to us as fossils. By studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other.
4. Yes. As the theory states that organisms have gradually changed from one from to another form transitional fossils should be found that show evidence of the transitional forms of the organism. In using the fossil record to support the Darwinian theory of evolution finding these transitional fossils is important.
5. Comparative anatomy is the study of the similarities and differences in the structures of different species. Similar body parts may be homologies or analogies. Both provide evidence for evolution.The structures are similar because they evolved to do the same job, not because they were inherited from a common ancestor.
6. Homologous structures share a similar embryonic origin; analogous organs have a similar function. For example, the bones in the front flipper of a whale are homologous to the bones in the human arm. These structures are not analogous. The wings of a butterfly and the wings of a bird are analogous but not homologous.
7. Structures that have lost their use through evolution are called vestigial structures. They provide evidence for evolution because they suggest that an organism changed from using the structure to not using the structure, or using it for a different purpose.
8. Evidence of an evolutionary common ancestor is seen in the similarity of embryos in markedly different species. Darwin used the science of embryology to support his conclusions. Embryos and the development of embryos of various species within a class are similar even if their adult forms look nothing alike.
9. Biogeography, the study of the geographical distribution of organisms, provides information about how and when species may have evolved. Fossils provide evidence of long-term evolutionary changes, documenting the past existence of species that are now extinct.
10. The process by which new species are produced from earlier species (speciation). It also involves processes leading to the extinction of species. ... Examples of macroevolution include: the origin of eukaryotic life forms; the origin of humans; the origin of eukaryotic cells; and extinction of the dinosaurs.
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Rearrange them in the correct sequence.
Harvesting, Sowing, Manuring, Tilling and Ploughing, Irrigation, Weeding.
Plzz Help ASAP
plz ASAPPP
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why is it important to determine the manner/mechanism of death
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N O 2) Select the best answer. What are three important minerals found in soil? O nitrogen, phosphorous, potassium O carbon, oxygen, calcium aluminum, lithium, magnesium copper, gold, silver
Answers
Answer:
Nitrogen, phosphorus, and potassium
Explanation:
Answer:
phosphorus, nitrogen and potassium
which organ is responsible for helping to keep the water concentration equal on each side of the cell membrane?
(please help I've been stuck on this for 2 days)
Answers
Answer:
solute membrane
Explanation:
Kidney is the main organ which is responsible for helping to keep the water concentration equal on each side of the cell membrane.
What is Kidney?The kidneys are the main organs in the body which remove waste products and extra water from the blood in the form of urine and also help to keep the chemicals such as sodium, potassium, and calcium balanced in the body. The kidneys also secrete hormones which help control blood pressure and stimulate bone marrow to make red blood cells.
Kidneys maintain water concentration in the body. Kidneys maintain homeostasis through osmosis. Osmosis is the phenomenon of movement of water or fluid particles from a region of higher concentration to a region of lower concentration through a semi-permeable membrane.
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A gene is a small section of DNA on a chromosome.
Complete the sentences.
A gene codes for a particular sequence of...
This sequence makes a specific....
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which supports the theory that some mountains were once at the bottom of the ocean?
A.there are underwater mountains on the ocean floor today
B.freshwater rivers flow to the ocean
C. fossils of marine organisms are found at the top of some mountains D both mountains and Ocean Floors have similar mineral in their Rock
Answers
Answer:
★ C. fossils of marine organisms are found at the top of some mountains
Explanation:
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Where would you collect
data during an
experiment?
Answers
Answer:
Recall that data can be collected in two main ways: (1) through sample surveys or (2) through designed experiments. While sample surveys lead to observational studies, designed experiments enable researchers to control variables, leading to additional conclusions.
Which natural events likely caused Earth's past mass extinctions?
Answers
Mass extinctions happen because of climate change, asteroid impacts, massive volcanic eruptions or a combination of these causes. One famous mass extinction event is the one that lead to the extinction of dinosaurs, 65 million years ago.
I hope it’s help
Answer:
Its because of climate change, asteroid impacts, massive volcanic eruptions or a combination of these causes.
Explanation:
question on picture for biology
Answers
Answer:
because doctors can determine your family's risk from your ariments
Explanation:
hope this helps
Answer:
First one I think
What is the role of gene expression
Answers
Answer:
Genes encode proteins and proteins dictate cell function. Therefore, the thousands of genes expressed in a particular cell determine what that cell can do.
Explanation:
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The saturated fats of animals differ from the unsaturated ones of plants. Unsaturated fats have
A. higher molecular weights.
B. more metabolic processes that they participate in.
C. nitrogen atoms in their structures.
D. a higher number of double bonds between carbon atoms in their structures.
E. more functional utility in animal species, particularly in marine life forms.
Answers
Answer:
D. a higher number of double bonds between carbon atoms in their structures.
Explanation:
What are some ethical and philosophical questions that surround the issue of
genetic counseling? Might it sometimes be unwise to know ahead of time about
possible genetically linked disorders that might afflict your child or yourself?
Answers
Answer:
Genetic counseling raises concerns associated with confidentiality and privacy of the information. I consider that genetic information always is beneficial for the individual because this information can be used to determine the genetic predisposition of developing a particular inherited disease (and therefore prevent it).
Explanation:
Genetic counseling has historically been associated with concerns with confidentiality and privacy of genetic information. Genetic information about an individual such as carrier status (i.e., the presence of recessive deleterious alleles in the genome of the individual), his/her chance of developing a certain disease (e.g., cancer), or transmit this disease to his/her offspring is always stigmatizing, and therefore it must be kept confidential. In consequence, genetic information must be carefully handled by professionals because any filtration of this information may be harmful to the individual (for example, unscrupulous companies might use this information to select personal regarding the genetic predisposition to suffer inherited diseases). However, genetic information is very useful in order to determine the genetic predisposition of developing a particular inherited disease and thus take the necessary actions to prevent it (e.g., avoid high salt foods if there is a genetic predisposition of developing cardiovascular diseases).
Answer:
Um, I'm guessing you don't need this answer anymore seeing that it was posted last year.... but I think that it is good to know if you child has genetically linked disorders that might afflict your child or yourself so that you can be prepared before hand.
~Hope this helps! :)
What are possible effects warming the atmosphere?
Answers
How does lateral gene transfer help explain the evolution of antibiotic resistance in bacteria?
Answers
Answer:
Lateral gene transfer allows the bacteria to develop resistance to antibiotics and spread it between bacterial populations. ... This process allows bacteria to transfer genes from one population into another. As a result, the next generation would evolve and develop defenses that would make them resistant to the drug.
Explanation:
Please select the word from the list that best fits the definition
plants that require 12 or more hours of darkness to flower
long-day plants
gibberellins
stimulus
cytokinins
day-neutral plants
photoperiodism
short-day plants
abscisic acid
tropism auxin
photosynthesis
respiration
Answers
A student places water in a freezer. Several hours later, the student observes that the water has frozen.
Which statement BEST describes the arrangement and motion of particles in the ice?
The particles have high energy and move about freely.
The particles have low energy and vibrate in a fixed position.
The particles have high energy, are charged and move about freely.
The particles have low energy and are able to move past each other.
Answers
Answer:
the particles have low energy and are able to mive and past each other
The particle in the ice will have low energy and vibrate in a fixed position. The correct option is B.
What is freezing?The process by which something changes from liquid to solid as the temperature drops is known as freezing. Water basically freezes at 0 degrees Celsius.
The process of changing a substance from a liquid to a solid is known as freezing. When a liquid's molecules slow down enough, their attractions cause them to arrange themselves into fixed positions as a solid.
The average energy of the molecules in a liquid decreases as it cools. At some point, the amount of heat removed is great enough that the molecules' attractive forces draw them close together, and the liquid freezes to a solid.
The particles in a liquid eventually stop moving and settle into a stable arrangement, forming a solid.
Thus, the correct option is B.
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3 Full sentences,
To what extent can we reverse the destruction of the natural world?
Answers
Answer:
Using too much water from lakes and rivers can affect animals’ habitat. Conserve this resource by taking five minute showers, turning off the faucet when you brush your teeth, and bugging your parents to fix leaky pipes.
Explanation:
Match each immune cell with the method it uses to neutralize a pathogenic microbe that has infected a human - Cytotoxic T cell - Helper T cell - B cell - Natural Killer Cell - Macrophage - Mast Cell A. kills infected human cells after recognizing antigens displayed on MHC class 1 B. does not directly kill microbes; after recognition of a specific antigen displayed on MHC Class 2, it secretes molecules that help other cells to do so. C. phagocytoses microbes after recognizing specific antigens; secretes antibodies D. kills virus-infected human cells by releasing perforin and granzymes. E. Phagocytoses microbes after recognizing PAMPs; acts as an Antigen Presenting Cell to activate another type of immune cell F. Does not directly kill microbes; secretes histamine to initiate an inflammatory response.
Answers
Answer:
Cytotoxic T cell - kills infected human cells after recognizing antigens displayed on MHC class 1 B.
Helper T cell - does not directly kill microbes; after recognition of a specific antigen displayed on MHC Class 2, it secretes molecules that help other cells to do so.
B cell - phagocytoses microbes after recognizing specific antigens; secretes antibodies
Natural Killer Cell - kills virus-infected human cells by releasing perforin and granzymes.
Macrophage - Phagocytoses microbes after recognizing PAMPs; acts as an Antigen Presenting Cell to activate another type of immune cell
Mast Cell - Does not directly kill microbes; secretes histamine to initiate an inflammatory response.
Explanation:
T cell are immune-response cells that originate in the bone marrow but migrate and develop in the thymus gland. They are of two classes; Cytotoxic T cells and Helper T cells.
Cytotoxic T cell - kills infected human cells after recognizing antigens displayed on MHC (Major histocompatibility complex) class 1 B.
Helper T cell - does not directly kill microbes; after recognition of a specific antigen displayed on MHC Class 2, it secretes molecules that help other cells to do so.
B cells are formed and develop in the bone marrow. They make antibodies against antigens, and phagocytoses microbes after recognizing specific antigen.
Natural Killer Cells are cytotoxic lymphocytes of the innate immune system. They kill virus-infected human cells by releasing perforin and granzymes.
Macrophages are a type of white blood cells that detects and phagocytoses microbes after recognizing PAMPs (Pathogen-associated molecular pattern) They also act as Antigen Presenting Cell (APCs) to activate another type of immune cell
Mast Cells are cells found in the connctive and they function as part of the immune system of the body. They do not directly kill microbes. They secrete histamine to initiate an inflammatory response.
Unit 5 DQ 1 Debate on global warming The issue of global warming has become an unending debate. Which side of the debate are you in? Support your decision with one reference
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Answer:
Global average temperatures have increased in evolving patterns in which cooler temperatures (shown in blues) have generally changed to warmer temperatures (shown in progressively intense reds).
Is bacteria prokaryotic or eukaryotic
Answers
how the cardiovascular, respiratory and digestive systems work together to provide cells with the raw materials they need to ensure healthy cell function
Answers
Explanation:
The respiratory system works directly with the circulatory system to provide oxygen to the body. Oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen-rich blood to tissues and cells.
From what blood vessel does the blood that flows through the
grafted blood vessel come?
Answers
Which components makes up the "backbone" of the DNA molecule?
O phosphate and nitrogen bases
O deoxyribose sugar only
O nitrogen bases
O phosphate and deoxyribose sugar
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In mouse, genes X, Y and Z are on chromosome 2. The map of genes X, Y and Z is:
X--------20mu--------Y---------------30mu---------Z.
You cross an individual with genotype XXYYZZ to an individual with genotype xxyyzz, and F1 progeny are collected. Assume interference between regions (X-Y and Y-Z) is 40%. You then perform a cross between an F1 individual and an individual with genotype xYz/xyz. Among 1000 progeny, how many of them will be of the genotype xxyyzz?
Answers
Answer:
36 individuals xxyyzz
Explanation:
Available data:
X-Y = 20MUY-Z = 30MUCross: XXYYZZ x xyyzzF1= XxYyZzI = 40%2nd Cross: XxYyZz x xxYyzzF2 = 1000 individualsWe need to know how many individuals from the F2 are going to be xxyyzz
xxyyzz genotype is the result of a double recombinant event.
First, we need to analyze the given information:
→ Distances between genes
The genetic distance result from multiplying the recombination frequency of each region by 100 and expressing it in map units (MU). So, if we have the genetic distance we can divide it by 100 and get the recombination frequency:
Let us say that region I is the distance between X and Y. And region II is the distance between Y and Z.
GD = genetic distance
RF = Recombination frequency
GD (X-Y) = RF x 10020MU = RF x 100
20MU/100 = RF
0.2 = RF (Region I)
GD (Y-Z) = RF x 10030MU = RF x 100
30MU/100 = RF
0.3 = RF (Region II)
Now we have the recombination frequency of Region I and Region II.
→ Interference
Knowing the interference value will let us know the value of the coefficient of coincidence, which will also lead us to the number of individuals xxyyzz.
I = 40%
I = 1 - CC ⇒ CC = coefficient of coincidence
Clearing this equation gives us the value of CC
CC = 1 - I
CC = 1 - 40% = 1 - 0.4
CC = 0.6
To calculate the coefficient of coincidence, CC, we can also use the next formula:
CC = observed double recombinant frequency/expected double recombinant frequency
Now, we are interested in knowing the value of the observed double recombinant frequency.
Note:
observed double recombinant frequency = total number of observed double recombinant individuals/total number of individuals expected double recombinant frequency = recombination frequency in region I x recombination frequency in region II.So, to get the value of the observed double recombinant frequency, first, we need to get the value of the expected double recombinant frequency. And we can do it because we already have the recombination frequencies in both regions.
expected double recombinant frequency = recombination frequency in region I x recombination frequency in region II
- Recombination Frequency - RI = 0.2
- Recombination Frequency - RII = 0.3
expected double recombinant frequency = 0.2 x 0.3
expected double recombinant frequency = 0.06 = EDRF
Now that we know the value of the CC and the expected DRF, we can get the observed double recombinant frequency.
CC = observed double recombinant frequency/expected double recombinant frequency
- CC = 0.6
- EDRF = 0.06
CC x expected double recombinant frequency = observed double recombinant frequency
0.6 x 0.06 = observed double recombinant frequency
0.036 = observed double recombinant frequency = ODRF
Finally, as this is a frequency, we need to multiply it by the total number of individuals in the F2 to get the number of observed double recombinant individuals.
- ODRF = 0.036
- N = 1000
Double recombinant individuals = 0.036 x 1000 = 36 individuals xxyyzz.
if all the bees in the hive come from the queen how are they related
I NEED AN ANSWER
Answers
Answer:
Aren't they brothers and sisters
Answer:
The queen had all made them, so theyre brothers and sisters.
The graphs here show the distribution of beak depths for the ground
finches on Daphne Major, an island in the Galapagos. The bird beaks were
measured over a multi-year study, including a time period before and after
a drought. The drought reduced the supply of seeds and left most of the
seeds as thick-walled nuts that survived the drought. Analyze the data and
select the claim about natural selection and genetic diversity that is
supported by the data.
Natural selection tends to reduce genetic variation, as there was a smaller distribution
of beak depths, but it tends to select for the most fit phenotypes, as there was an
increase in average beak depth after the drought.
Natural selection tends to increase genetic variation, as there were more ground
finches after the drought, and it tends to select for the most fit phenotypes, as there
was an increase in average beak depth after the drought.
Natural selection tends to reduce genetic variation, as there was a smaller distribution
of beak depths, but it tends to select against the most fit phenotypes, as there was an
increase in average beak depth after the drought.
Natural selection tends to increase genetic variation, as the average beak size
increased after the drought, but it tends to select against the most fit phenotypes, as
there was a decrease in population size for the finches after the drought
Answers
Answer: (A) Natural selection tend to reduce genetic variation as there was a smaller distribution of beak depths, but it tends to select for the most fit phenotypes, as there was an increase in average beak depth after the drought.
Explanation: The picture below shows proof if needed. On USATP
Natural selection tend to reduce genetic variation as a smaller allocation of beak depths, but it tends to select for the most fit phenotypes, as an increase in average beak depth after the drought.
How does natural selection affect genetic variation?Genetic variations that vary gene and protein role.
If a trait is favourable and helps the someone survive and breed, the genetic variation is more likely to be passed to the next generation.
Thus, option "A" is correct by selecting for or against a specific gene.
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Which substance keeps its shape, weight, and volume when it is moved to a bigger container?
Answers
Answer:
Wood
Explanation:
Unless kept in a confined space, oil, are, and water will all naturally deform out of their previous shape when transferred to another container. Wood, on the other hand, is a solid, which means it will stay in it's shape.