Answer:
Miasma theory was replaced because John Snow collected data that showed that germs cause disease.
Explanation:
The theory of miasma was proposed in the past when some scientists —like doctors Thomas Sydenham and Giovanni Maria Lancisi— thought that disease was the product of emanations originated by the decomposition of organic matter. This theory was based on the fact that diseases predominated in places with poor hygienic conditions.
John Snow, an english physician, was one of the main contributors to the microbial theory of disease. In 1854, while a cholera epidemic was occurring, he collected data and organized it statistically and then concluded that the disease was caused by germs present in drinking water. This data was contrary to the miasma theory, which would eventually be displaced by the microbial theory of the disease.
Please help me with this and answer correctly.
Brainliest will give!!
Answer:
Sorry can't help
Explanation:
PLEASE GIVE ME BRAINLIEST
I will mark brainest if you get it right
A photovoltaic cell captures ____ to be used for power.
A. Wind
B. Water
C. Coal
D. Sunlight
Answer:
D. Sunlight
Explanation:
Answer:
santa claus
Explanation:
What term describes parts of the body that are made from different kinds of cell
Answer:
The term that describes the parts of the body with different kindsof cells is organs, which in turn are made up of different tissues.
Explanation:
The cell is the structural and functional unit of all living beings, with the capacity to multiply and unite to form tissues.
Each tissue is a differentiated or specialized structure, formed by groups of cells of the same type, such as muscle, nerve, connective, cartilage and bone tissue, among others.
The specialized tissues in turn form organs, with specific structures and functions, such as muscle, brain and nerves or bones and joints. For this reason, organs are different body parts, formed by different kinds of cells.
what are the scientist doing incorrectly? what could they do to make their work in the lab safer? why is it important to follow these procedures? part d
Answer:
What the scientist is doing incorrectly is disposing of a chemical or biological waste in the common sewer.
Explanation:
One of the most important biosecurity measures is the proper disposal of chemical and biological waste. What the shown scientist is doing incorrectly is disposing of potentially harmful substances in a normal sewer.
What could he do to make their work in the lab safer?The main thing that must be done to maintain a safe laboratory is to perform proper disposal of chemical or biological waste, which must be placed in airtight containers and transported to a location for safe disposal.
Chemical waste is usually taken to a landfill where it can be neutralized. Biological waste is transported to incinerators for complete disposal. Why is it important to follow these procedures?Following these procedures is important to avoid chemical or biological contamination of both the environment and people.
One danger of excessive nitrogen levels in water is BLANK.
Answer:
light
Explanation:
excessive nitrogen can harm water bodies excessive nitrogen can cause overstimulation of growth of aquatic plants and algae excessive growth of the organisms intern can clogged water intakes used to solve oxygen as they decompose and block light to deeper waters
WILL GIVE BRAINLIEST!!!!!!!!!
In all living things, the presence of what structure supports the cell theory.
cell membrane
chloroplast
cell wall
vacuole
Answer:
chloroplast
Explanation:
I NEED HELP
1. What are chromosomes?
2. What are the four phases of mitosis, in the correct order?
3. In what phase of mitosis are chromosomes moving toward opposite sides
of the cell?
4. Compare the two nuclei that form as a result of mitosis?
5. What is cytokinesis, and when does it occur?
Answer:
1. a chromosome is a dna strand that has genes
2. prophase, metaphase, anaphase, telophase
3. anaphase
4. the two nuclei are identical daughter cells and they have the same number of chromosomes
5. this is when the cell separates forming two new daughter cells and it occurs in the late telophase of mitosis.
sorry if this is wrong but this is how i learned it! hope it helps!
Explanation:
Using its long tail and long hind legs, the Ord's kangaroo rat can jump 2 m in the air as it hops away from predators, such as snakes and owls [A, 4 marks] a. How would Lamarck account for the origin of the long hind legs of the Ord's kangaroo rat? b. How would Darwin?
Answer and Explanation:
a. According to Lamarck, the origin of the long hind legs of the Ord's kangaroo rat is acquired due to extensive use of the muscle legs to jump. Such physical characteristics could be transmitted to future generations. This theory is called Neo-Lamarckism.
b. Darwin, on the other hand, theorized that in a population of Ord's kangaroo rat, there was an individual whose characteristics, long tail and hind legs, had more chances of escaping its predator and, consequently, could survive and reproduce. This theory is called Darwinism.
Why is sickle cell anemia so harmful to its carriers?
Answer: BECAUSE IT MAKES THE RED BLOOD CELLS SHRINK
Explanation:
Answer:
Sickle cell anemia is harmful to the body because it is enagering your spleen and with less healthy red blood cells circulating in the body, you can become chronically anemic.
Sickle cell anemia puts your body at more risk for infection.
Explanation:
In non-mendelian genetics, humans have 4 blood types in which A and B are codominant and o is recessive. I cross two parents with type AB blood. What is the percentage of children with type B blood?
A. 0%
B. 25%
C. 50%
D. 100%
Answer:
i think it may be 50 dont be mad if im wrong
Explanation:
recessive takes over from what i read i dont see any o so it can be half a half b so 50...
Patterns of inheritance are usually more complicated than what is predicted by Mendelian genetics. Explain four possible exceptions to Mendelian genetics involving the inheritance patterns of a single gene and provide an example of each.
Answer:
Please find the explanation of the four possible exceptions to Mendelian genetics below.
Explanation:
Genetics, generally, has to do with how genes are inherited or transferred from parents to offsprings. Gregor Mendel, however, explained this concept in his principles of inheritance called Mendelian genetics. There are, however, exceptions to this mendelian principle called Non-mendelian pattern of inheritance i.e patterns of inheritance that do not follow Mendel's principles. Four of them are explained below:
- Incomplete dominance- This non-mendelian inheritance pattern occurs when one allele of a gene does not completely mask its allelic pair, but instead forms an intermediate phenotype. This is in contrast with Mendelian genetics that proposes complete dominance. For example, a red and white flower produce a pink flower (intermediate).
- Codominance- This is another non-mendelian inheritance where two alleles of a gene are simultaneously expressed. For example, roan cattles is a combination of both red and white hairs.
- Multiple alleles: Some traits in a population are controlled by more than two alleles, as explained in mendelian inheritance. Examples of trait controlled by multiple alleles is height in humans.
- Sex-linked inheritance: Some traits are controlled by genes on sex chromosomes i.e. X and Y chromosomes. This genes exhibit inheritance pattern that are different from Mendel's. Example is haemophilia disease controlled by an affected gene on the X-chromosome.
The spinal cord relays messages between the body and the brain. These messages control body functions like movement, bladder and bowel control and breathing. Each vertebra has a pair of spinal nerves that receive messages from the body (sensory impulses) and send messages to the body (motor impulses). The spinal nerves are numbered 1 to 55 from the neck down. The first eight as seen here are the vertebrate and send messages to the back of the head, neck, shoulders, arms, hands and diaphragm. A) cervical B) lumbar C) sacral D) thoracic
Match the given symbol or molecular formula to the term that best describes it.
SO2
K
Cl2
C6H6
element
organic compound
inorganic elemental molecule
inorganic compound
Answer:
SO2 ==> inorganic compound
Cl2 ==> inorganic elemental molecule
C6H6 ==> organic compound
Explanation:
k=element
SO2=inorganic compound
cl2=inorganic elemental molecule
C6H6=organic compound is your answer.
happy new year (:
Which of these statements would be MOST important to include in an objective summary of the article?
A. The health triangle is a helpful tool for visualizing your total well-being.
B. Physical health represents your biological welfare and how to protect your body from illness or injury.
C. Consuming a well-balanced diet is one of the best ways to fuel your physical health.
D. You don't have to compete in Ultra-Marathons in order to reap the physical benefits of exercise.
Answer:
A
Explanation:
Some descriptions, such as color and odor, involve using your _____.
volume
measurements
senses
mass
Which combination of atoms will form a molecule, but
not a compound?
O W and X
O X and Y
O W and Z
O Y and Z
HELP PLZZZZ
Answer:
but you did not give z
Explanation:
what is z
5. Choose the phrases that would make the completed statement TRUE: "Cells will NOT divide if....
1)the DNA is damaged
2)the DNA has not replicated
3)there are not enough ribosomes in the cells
4)there are not enough nutrients to support cell growth
Answer:
The DNA is not replicated by the way the cells are used to exist
Why are elements called
the building blocks of matter?
A. They stack up nicely.
B. They make-up all matter.
C. They make-up most of the matter around us.
Answer:
B
Explanation:
what are the scientist doing incorrectly? what could they do to make their work in the lab safer? why is it important to follow these procedures? part E
Answer:
What the scientist is doing incorrectly is working on a computer console with several monitors, having tubes and flasks of chemicals or biological substances on the same work table, many of which have fallen to the floor breaking and spilling their contents.
Explanation:
In the image it can see that a scientist works with a computer, placed in a long table where there are a lot of flasks and test tubes, many of which contain substances and have fallen to the ground, breaking and perhaps spilling their contents. This is a incorrect practice, as there should be a console for the computer, while the laboratory material should be on separate work tables.
what could he do to make their work in the lab safer? Separate the work spaces by having a computer work area separate from the lab area.Keep the work area clean, avoiding falling containers and spilling chemical or biological substances.why is it important to follow these procedures?Following these procedures is important to maintain biosafety standards and avoid accidents that affect the work in progress or the health of staff.
As you observe an unknown cell under a microscope, you make the following observations..
Answer:
It is a plant cell that is being observed
Explanation:
With in the cell, there are chloroplasts that ONLY a plant cell has. It also has a cell wall which an animal cell does not, so it is clearly not an animal cell.
1. Negative feedback is bad for your body. True or false 2. Both negative and positive feedback works in a loop. True or false. 3. Feedback loops are open systems of information. 4. There are feedback systems found in the environment and mechanical systems.
Answer:
1. False
2. True
3. True
4. True
Explanation:
Negative feedback (or balancing feedback) happens when some capacity of the yield of a framework, cycle, or system is taken care of in a way that will in general decrease the variances in the yield, regardless of whether brought about by changes in the input or by different unsettling influences.
Though certain feedback will in general prompt unsteadiness through outstanding development, wavering or disorganized conduct, negative feedback for the most part advances steadiness. Negative feedback will in general elevate a settling to balance, and diminishes the impacts of bothers. Negative feedback loops in which the perfect measure of adjustment is applied with ideal planning can be entirely steady, exact, and responsive.
how can you demonstrate that plant prepare their own food on its leaves ? write with experiment
Answer:
Answer
take a plant having partially green and white leaves.
Destarch the plant leaves by placing the plant in dark room for three days.
The potted plant then placed in the exposure of sunlight for three days.
pluck the leaf of the plant and allow to boil it in alcohol to remove its green colour.
How Fast can you answer CORRECT how fast can i give you brainliest??? TWO answers explain your answer if its correct ill do a 100point question just for you:D..
HELP
Answer:
__B is the correct option__
Choose all the answers that apply.
Binary fission _____.
is the type of reproduction used by bacteria
occurs in organisms that do not have a membrane bound nucleus
is a type of sexual reproduction creates identical copies of the parent cell
is a type of asexual reproduction
Answer:
A, B, D
Explanation:
Binary fission occurs primarily in prokaryotes, but can occur in eukaryotes. It is used by bacteria and is asexual reproductio, not sexual.
Explanation:
occurs in organisms that do not have a membrane bound nucleus. Explanation: Binary fission is an asexual mode of reproduction. As it does not involve formation and fusion of gametes.
this is a cell not a plant, because the cell do not contain________
Answer:
Chloroplast.
Explanation:
This is what I believe it is since we're obviously talking about an animal cell and NOT a plant cell like it says. Animal cells do not contain chloroplast.
If this is the answer you're not looking for, let me know! Hope this helped! :)))
Which type of cell transport occurs when there are an abundance of oxygen molecules
in the bloodstream, and they pass directly through phospholipids of the cell membrane
to enter cells?
Answer:
Diffusion
Explanation:
hope this helps!
A group of researchers wants to develop an experiment to determine whether a new drug effectively treats cancer. The researchers want to inject the drug in hamsters first to determine whether there are any potentially serious side effects.
Part A: What are some possible ethical issues with this type of testing?
Part B: While conducting the experiment, the researchers find cancer stops spreading, and they declare the new drug is responsible. Is this a good assumption? Explain.
Answer:
Part A: The animals are used for examining and determining the effect of a particular new drug for the treatment of the diseases and disorders before they are examined over humans. This practice is called as clinical trial.
The ethical issue associated with given type of testing is that animals have right to live and survive. They should not be subjected to the treatment where they experience harm or even death.
Part B: Those assigned to the control take a sugar pill. The only thing you want to vary across groups when you're conducting an experiment is the treatment. Since taking pills is a part of taking medication (the treatment), medical experiments often employ something called a placebo-controlled study where outcomes for those who are randomly assigned to take the medication are compared to outcomes for those who are randomly assigned to take a sugar pill. The sugar pill is expected to have no effect, so it serves as a useful baseline to compare the treatment to.
Answer:
The current code of ethics to be upheld in science experiments are as follows: the experiment must contain a clear scientific purpose, the animals must be housed and provided with care, the animals must be legally acquired, the least amount of suffering must be ensured, and the animals can only be used when it is entirely necessary.
In this paragraph, we can see the plan does not fit the code of ethics entirely- because this is a new drug, we can not be sure that this experiment will not be fatal for the animals, and that they will not suffer tremendously before passing on. The medicine should be tested first on a sample which is not living.
Explanation:
What is the function of cholesterol?
to keep the cell membrane from falling apart
to line the arteries of organisms
to store energy
to give us quick energy
Answer:
to store energy
Explanation:
Its main function is to maintain the integrity and fluidity of cell membranes and to serve as a precursor for the synthesis of substances that are vital for the organism including steroid hormones, bile acids, and vitamin D. Cholesterol is essential for making a number of critical hormones, including the stress hormone cortisol. Cholesterol is also used to make the sex hormones testosterone, progesterone, and estrogen. 2 The liver also uses cholesterol to make bile, a fluid that plays a vital role in the processing and digestion of fats.
Global Warming is not a thing!
Answer:
This is not an answer
Explanation:
You overhear your mom and dad talking about having a well installed in your yard. What advice can you offer them about determining the placement and potential effectiveness of the well? Think about what you know about how wells factor into the groundwater systems running below the surface of the Earth.
Answer:
Built well where water table present nearer to surface.
Explanation:
My advice for them about determining the placement and potential effectiveness of the well is that the well should be installed where the groundwater present nearer to the surface, the reason behind this advice is that minimum work and energy will be used for digging well. If the water table is present very deep, more work and energy will be utilized on the digging of the well. Those areas where more rainfall occurs, the depth of water table is less as compared to arid zones because due to more rainfall more water goes inside the soil and the water table rises.