Answer:
D
Explanation:
keep test tube away from all people
Always point the open end of the tube away from all people because the chemical is dangerous for human health and skin.
If we heat a substance or chemical in a test tube, we should hold it away from people because may be it can explode and the chemical split on the body that cause serious problems in people. We have to handle laboratory procedures very carefully because the chemicals are not good for health and can cause serious diseases in humans and can damaged the skin very badly so we can conclude that the open end of the test tube should be placed away from the people.
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describe the possible long term effects of HIV on the immune system
Explanation:
HIV attacks a specific type of immune system cell in the body. It's known as the CD4 helper cell or T cell. When HIV destroys this cell, it becomes harder for the body to fight off other infections. When HIV is left untreated, even a minor infection such as a cold can be much more severe.
What is the meaning of a null hypothesis being rejected?
Answer:
If there is less than a 5% chance of a result as extreme as the sample result if the null hypothesis were true, then the null hypothesis is rejected. When this happens, the result is said to be statistically significant .
What is a silent mutation?
Answer:
Mutations in DNA that do not have an observable effect on the organism's phenotype.
Method:
Search Engine
Which statement about multi cellular organisms is correct
Answer:
don't know ???????????
(*Its actually Physical Science)
Which kind of bond would occur between sodium (Na, Group IA) and chlorine (CI, Group VIIA)?
*I need this ASAP
A. ionic
B. no bond
C. metallic
D. covalent
What is the average for the following set of measurements?
27°C, 12°C, 31°C, 19°C, 23°C, 11°C, 17°C O A. 20°C B. 14000 C. 7°C O D. 28°C
Answer:
A. 20°C
Explanation:
If you add 27,12,31,19,23,11, and 17 altogether, it's 140. 140 divided by 7 is 20. So, 20 is the average.
What is the summer sleep of frog called??
Answer:
answer is aestivation
Explanation:
Love ya bye!
Prophage refers to: (please give right answer only)
Answer:
: an intracellular form of a bacteriophage in which it is harmless to the host, is usually integrated into the hereditary material of the host, and reproduces when the host does.
DNA and Rna are macromolecules made up of what?
Answer:
Nucleotides
Explanation:
"These macromolecules consist of a large number of linked nucleotides, each composed of a sugar, a phosphate, and a base."
Hope this helps:
DNA, RNA, and the Flow of Genetic Information
https://www.ncbi.nlm.nih.gov/books/NBK21171/
DNA and RNA are macromolecules made up of units called nucleotides.
What are nucleotides?A nucleotide is the most fundamental element of nucleic acids (RNA and DNA). A sugar molecule (ribose in RNA or deoxyribose in DNA) is bonded to a phosphate group and a nitrogen base to form a nucleotide. Adenine (A), cytosine (C), guanine (G), and thymine (T) are the bases that make up DNA. The base uracil (U) replaces for thymine in RNA. Long chains of nucleotides make up DNA and RNA molecules, which are polymers.
hence nucleic acids like DNA and RNA are made up of nucleotides
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what is the definition of Concentration Gradient?
During Transcription, an)
is created in the
A. mRNA strand, nucleus
B. polypeptide chain, nucleus
C. protein, cytoplasm
D. tRNA strand, cytoplasm
Answer:
A. mRNA stand, nucleus
Explanation:
Transcription is defined as the process of copying DNA. This happens so that the cell can produce the proteins necessary for basic life functions.
DNA cannot simply be taken out of the nucleus that easily. So, the DNA must be copied into a different form. That's what RNA is for, specifically mRNA.
mRNA stands for "messenger RNA", which is a copy of DNA that can be transported outside the nucleus and be read to produce proteins in ribosomes.
Transcription happens in the nucleus, where the DNA is housed in. It can't be located anywhere else anyways since DNA cannot leave the nucleus.
Therefore, our answer is A.
Topic: AP Biology
Which descriptions apply to these two compounds?
Answer:
atoms and molecules
Explanation:
In a pyramid of numbers, what will be the largest trophic level?
A. Primary Consumers
B. Secondary Consumers
C. Decomposers
D. Producers
In a randomized trial, scientist try to make sure that there is only one difference between the two groups. What do we call all the things that are the SAME Between the two groups?
A. Predictions
B. Controls
C. Constant
D. Variables
Hey there! I'm happy to help!
A. Predictions are guesses you make about the result of a trial. Let's say that you want to test what will happen if you put less eggs into a cookie recipe. You could make a prediction that the cookies will be more crumbly. This is not the term for things that are the same between two groups, so this is incorrect.
B. Controls are a type of variable that isn't influenced in a unique way as part of the experiment. This is to be able to compare the things you change to a thing that hasn't changed. With our cookie example, a control group would just be a cookie recipe with the normal amount of eggs. Then we can compare a normal cookie to one with less eggs. We see that a control is a type of group, and not a specific thing that is similar or different between the groups, so this is incorrect.
D. Variables are things that can change or vary in your experiment. There are independent variables, which are things that you change, such as the number of eggs in the recipe. Then, you have dependent variables such as color, texture, taste, etc. However, these can change depending on the group because the number of eggs could switch, so this is the wrong term and incorrect.
C. Constants are things that you do not change as part of your experiment. You do not change these variables. In our case, the constants will be all of the other ingredients like the amount of flour, milk, water, sugar, etc. If we have a control group and a group with less eggs, these things will remain constant in both of them. So these things are the same between the two groups, so this answer is correct.
We call the things that are the same between the two groups C. constants.
Have a wonderful day and keep on learning! :D
Which of the following are measurable? (Select all that apply)
✓ How often a plant is watered
✓ How much sunlight a plant receives
Seeing the pretty leaves on a plant
The actual number of new leaves on a plant
Answer:
a
Explanation:
well of you use a cup to give a plant water you can measure how much it drinks
The measurable factors are A) How often a plant is watered, B) How much sunlight a plant receives, D) The actual number of new leaves on a plant.
Options (A) (B) & (D) are correct.
Measurable factors are those that can be quantified or expressed numerically. A) The frequency of watering can be counted and tracked over time. B) Sunlight can be measured in terms of intensity, duration, or light levels. C) "Seeing pretty leaves" is subjective and not quantifiable.
D) The actual number of new leaves is a concrete count, making it measurable. When studying or managing plants, it's essential to focus on quantifiable aspects, like watering frequency, sunlight exposure, and counts of observable changes, for accurate analysis and decision-making.
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The complete question is:
Which of the following are measurable? (Select all that apply)
A) How often a plant is watered
B) How much sunlight a plant receives
C) Seeing the pretty leaves on a plant
D) The actual number of new leaves on a plant
Proteins can be denatured in many ways.
Which of the following will NOT denature
a protein?
A. pH
B. temperature
C. too many enzymes
D. salt content
Answer:
Explanation:
However, at very high salt concentration, the increased surface tension of water generates a competition between protein and salt ions for hydration. Salts strip off the essential layer of water molecules from the protein surface eventually denaturing the protein
Too many enzymes cannot denature protein.
Enzymes are a type of protein so they will not get denatured in presence of one another.Enzymes are proteins that speed up any biochemical reaction in the body.What is denaturation of protein?It is a process of modifying the molecular structure of a protein.It involve breakage of many of the weak bonds within the protein molecule that are responsible for the structure of protein and its order.It can happen due to high temperature, pH, salt concentration and mechanical concentration.To know more about denaturation of protein here
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what could a human living millions of years ago have in common
What are your options, kid?
7. Observations and inferences are
important in science. How would you
explain the difference between the
two words?
Hey there! I'm happy to help!
Observations are things that can be written down or described. You can observe something with any of your five senses: you can see what color something turns, you can hear the noise something makes, you can taste a cookie with a different amount of an ingredient, you can smell an odor produced by a chemical reaction, and you can feel the texture of different samples.
You can also create observations by using scientific tools. For example, instead of feeling if water is hot or cold, you could use a thermometer. This will give you numerical data which can be put into a table or graphed for further analyzing.
Inferences are created from observation. You cannot make an inference without observation. Observations lead to inferences. Inferences are conclusions or guesses made from the observations. You could infer that sugar makes a cookie taste sweeter after experimenting with no sugar and observing that it tasted bitter. You could infer that more weight allows things to travel further after going down a ramp after measuring the distances different weights travel, graphing it, and observing the data.
Have a wonderful day and keep on learning! :D
¿Qué ocurre cuando inspiramos?
Answer:
Cuando respiramos, el diafragma se mueve hacia abajo, en dirección al abdomen, y los músculos de las costillas empujan a las costillas hacia arriba y hacia afuera. Esto hace que la cavidad torácica se agrande y tome aire a través de la nariz y la boca para enviarlo a los pulmones.
Which of the following types of compounds is unlike the other three?
A wax
B saturated fat
C phospholipid
D polysaccharide
what will happen if all snakes are killed
If all snakes are killed the prey population will grow and overlap effects would ripple through the ecosystem and cause considerable damage. the prey population that snakes feed on would grow, and the predators that feed on snake will die out.
Someone help me please lol
Answer:
what do you need help with.
Explanation:
Which term defines a well tested,scientifically supported statement that describes how something happens
Answer:
The term would be: Theory
Explanation:
A theory is a supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained. It is a well-substantiated explanation of an aspect of the natural world that can incorporate laws, hypotheses and facts.
Answer:
theory
Explanation:
Suppose a rural community lives at the top of a mountain. They hold a community meeting to discuss the following options to use as their main energy source; Hydro-power, wind energy, or biofuel. List their options from the ideal to the least ideal. Explain your answer.
Please answer ASAP... Ill give brainliest
What are the homeostatic pressures an axolotl goes through and how do
they deal with that?
The force that pulls planets toward the Sun is called
gravity
magne
Offerentiation
Answer:
The force that pulls planets towards the Sun is called gravity.
1. What happens when matter changes state?
a. Its chemical properties change.
b. Its physical properties change.
c. The energy of its particles remains the same. hape
d. two of the above
Answer:
Matter either loses or absorbs energy when it changes from one state to another. For example, when matter changes from a liquid to a solid, it loses energy. The opposite happens when matter changes from a solid to a liquid. For a solid to change to a liquid, matter must absorb energy from its surroundings.
Answer:
d.
Explanation:
Its chemical and physical properties changes as a result of a change in temperature (increase or decrease in temperature).
Describe the effect of increased carbon dioxide concentration on blood pH
Answer:
As it combines with water, it forms carbonic acid, making the blood acidic. So CO2 in the bloodstream lowers the blood pH. When CO2 levels become excessive, a condition known as acidosis occurs. This is defined as the pH of the blood becoming less than 7.35
The increase in the carbon dioxide concentration on blood pH leads to the condition known as Acidosis.
What is the normal blood pH?The level of normal blood pH in humans significantly ranges from 7.35 to 7.45 on a pH scale. It is considered neutral but experimentally it is slightly basic in nature.
As the concentration of carbon dioxide in the blood increases, the carbon dioxide in the presence of water forms carbonic acid which lowers the blood pH from 7.35.
This reduction in blood pH is known as acidosis. This is caused by the overproduction of acid within the body due to excessive concentration of carbon dioxide in the blood's pH. Acidosis leads to feeling fatigued, lethargic, muscle aches, etc.
Therefore, the concentration of carbon dioxide on blood pH negatively harms the health of an individual.
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Describe the cell structure of fungus in detail with a neat labeled diagram.
Answer:
Fungal cells differ from mammalian cells in that they have cell walls that are composed of chitin, glucans, mannans, and glycoproteins. Both mammalian and fungal cells have cell membranes; however, they differ in their lipid composition.
Explanation: Like plants and animals, fungi are eukaryotic multicellular organisms. Unlike these other groups, however, fungi are composed of filaments called hyphae; their cells are long and thread-like and connected end-to-end, as you can see in the picture below.
Overview of photosynthesis, using the detailed inner structure of a leaf.
Answer:
Photosynthesis is the process in which light energy is converted to chemical energy in the form of sugars. In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct.
Explanation:
