Answer:
The two hydrogen atoms and one oxygen atom within water molecules (H2O) form polar covalent bonds. ... As a result of water's polarity, each water molecule attracts other water molecules because of the opposite charges between them, forming hydrogen bonds.
Explanation:
How is IGCSE CEntre?
Answer:
so good place
Explanation:
Answer:
yepp it is a good place !!
Which of the following is the most important in preventing the spread of
microorganisms in a food establishment?
effective handwashing
wearing gloves when handling food
removing all jewelry
wearing a hair net
Answer:
effective handwashing
Explanation:
1. Quasars are extremely distant celestial bodies. Investigators
using a special telescope determined that a certain quasar
was emitting waves with a frequency of 1.41 x 10° Hz. An
electromagnetic spectrum is shown.
gamma rays
visible light
Radio
waves
Electromagnetic Spectrum
Infrared Visible Ultraviolet
rays light waves
microwaves
Microwaves
Gamma
rays
X-rays
102
102
10-30
10-12
10-5
5 x 10 10
Wavelength (m)
d
X-rays
www
CLEAR ALL
10*
10
10
1020
102
101 10'
Frequency (Hz)
C
The investigators were most likely using a telescope that
detects-
Answer: microwaves
Explanation:
The investigators were most likely using a Telescope that detects ; ( C ) microwaves
From the electromagnetic spectrum provided the wavelength of a microwave is 10⁻² and the frequency of the microwave is about 10⁸ Hz which is closest to 10⁹ Hz. Given that the frequency detected with the use of the spatial telescope was 1.4 * 10⁹ Hz.
The most likely wave that this telescope would detect is Microwave because its frequency falls within the closest frequency range of the telescope.
Hence we can conclude that The investigators were most likely using a Telescope that detects ; ( C ) microwaves
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If a female lion runs a distance of 469.2 meters while chasing an antelope, how many millimeters did she run?
Answer:
the lion ran 469200 millimeters
Explanation:
469.2 x 100 = 469200
What stays constant in water (even if you evaporate it or freeze it )?
Is it possible for two parents that both have a recessive trait to pass off the dominant trait to their offspring???
Which statement best describes the effect on water transport across the cell membrane if the aquaporin in the figure ceases to function?
Answer:
Water molecules will still be able to move across the cell membrane but at a slower rate.
Explanation:
D isn’t a sensible answer because Aquaporin is a protein with a role to regulate water transport. In its absence, of course there will be defects. And A is impossible due to the existence of active transport. (I also looked it up) (:
Answer:
Water molecules will still be able to move across the cell membrane but at a slower rate.
Explanation:
The aquaporin facilitates water passage, but water can still move across the membrane by osmosis. (osmosis requires no channel protein, but aquaporin makes diffusion faster).
(Physical science! Help!)
Answer:
b
Explanation:
True or False:
Cold fronts often bring stormy weather.
Answer:
true, Since the other person said false here's Evidence:
Many fronts cause weather events such as rain, thunderstorms, gusty winds, and tornadoes. At a cold front, there may be dramatic thunderstorms. At a warm front, there may be low stratus clouds. Usually, the skies clear once the front has passed.
which organisms does the Barracuda use for energy
a.Cleaner Wrasse
b.Lemon Shark
c.Algae
d.Parrotfish
Answer: I believe it's parrot fish
Explanation:I think it's because they aren't bigger than the barracuda i've never heard of them eating algae and Cleaner Wrasse just help the barracuda by cleaning their teeth and mouth area
The organisms that are usually fossilized
by replacement are what?
Answer:
when the original shell or bone dissolves away and is replaced by a different mineral; when this occurs with permineralization, it is called petrification. In compression, the most common form of fossilization of leaves and ferns, a dark imprint of the fossil remains.
Explanation:
!!!! PLEASE ANSWER !!!!! What factors increase the likelihood that all alluvium will be deposited ???
Answer:
Any thing that decreases the stream's velocity such as a bend in the river, a change in gradient or something blocking its path.
Explanation:
Any thing that reduce the stream's speed such as a turn in the river, a change in angle or something prevent its path.
What is soil explain?Soil is the thin layer of material covering the earth's surface and is formed from the weathering of rocks. It is made up mainly of mineral particles, organic materials, air, water and living organisms all of which interact slowly yet constantly.
Thus, reduce the stream's speed such as a bend in the river, a change in angle or something prevent its path.
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Which homeostatic process moves particles against a concentration gradient?
dynamic equilibrium
passive transport
osmosis
active transport
Answer:
Active Transport
Explanation:
Active transport is the movement of dissolved molecules into or out of a cell through the cell membrane, from a region of lower concentration to a region of higher concentration. The particles move against the concentration gradient , using energy released during respiration.
Whoever is reading this is really luck because i know all the answers to this quiz, the answers are:
B- osmosis
B- 12
D- active transport
B- during a negative feedback loop
C- 1000x
C- nucleic acids.
A, B, C, D, F, G- in saliva , in mucus , on a door handle , on a water fountain
C- Which cereal contains the most sugar?
C, D, E- Spindle fibers disappear, Nuclear membranes form, Cytoplasm starts to divide.
B- urine
C- cnidarians, mollusks, annelids, arthropods, echinoderms, chordates
A- The contractions would increase.
A- Interphase
B- the cell membrane
C- Its sex cells are haploid and a result of meiosis.
A- mitochondria
A- scanning electron microscope and scanning tunneling microscope.
B- velocity
A- a reflex
C- sublimation and melting
D- B-cells and T-cells
D- scanning tunneling microscope
C- pseudoscience
D- Leonna has a solid, Xiao has a liquid, Blake made a mistake, and Amir has a gas.
C- X: mostly unicellular, nucleus, make or consume food
Y: mostly multicellular, nucleus, eat dead or decaying organisms
Sorry to everyone who didn't get 100% with all of these answers- these are the answers to the Cumulative Exam Review on edge! -Cvest
Passive transport moves materials from high to low which is ______ the concentration gradient.
Against
Over
With
Around
Answer:
I think that it is with the gradient because it does not require energy to pass-through
An experiment is carried out to determine how different PH values of soil will affect the growth of tomato plants. In this experiment, the dependent variable could be the
A) height of the tomato plants
B) pH of the soil
C) specific variety of tomato plants used
D) pH of enzymes is tomato leaf cells
Answer:
A. Height of tomato plants
Explanation:
The dependent variable in an experiment is the variable that the experimenter measures or the variable that responds to changes made to the independent variable. The dependent variable is dependent on the independent variable.
In this experiment conducted to determine how different PH values of soil will affect the growth of tomato plants, the growth of the plants is measured by their height. Hence, the dependent variable is the HEIGHT OF THE PLANTS.
HELP???????????????????????????????
Answer:
B.) why do some materials rust more quickly than others
*
Iron, water, and sugar are examples of matter that are nutrients.
True or false
Answer:
false
Explanation:
water is just good for you and some sugars are good
Iron, water, and sugar are examples of matter that are nutrients. So the statement is true.
What are nutrients?
The substances in food known as nutrients give us the energy needed for development, repair, and other vital living activities. Although not all nutrients are energy-producing, they are all required in one way or another. There are two groups of these nutrients:
macronutrients, which the body needs in huge quantities.micronutrients, which the body needs in minute amounts.
The environment may provide the aforementioned nutrients. Macronutrients give a living thing the energy it needs to run its metabolic system. They offer enormous energy that can be processed and used to produce energy. Fats, proteins, and carbs are examples of macronutrients.
Micronutrients supply the necessary building blocks for metabolism to function. To regulate bodily processes, they also create new tissues and replace ones that have been destroyed. Calcium, iron, vitamins, minerals, iron, and vitamin C are examples of micronutrients.
Therefore, iron, water, and sugar are examples of matter that are nutrients.
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Which list correctly aligns the levels of organisms from the least to the most complex?
A. cell → tissue → organ → system
B. system → tissue → organ → cell
C. organ → system → tissue → cell
D. tissue → organ → cell → system
Vhat is the function of the cell wall in a plant cell?
Answer:
The cell wall gives the plant stability
Explanation:
Answer:
It surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress.
Explanation:
How did the development of a waxy cuticle help plants adapt to life on land?
O A. The cuticle minimized water loss from leaves.
B. The cuticle absorbed nutrients from the soil.
C. The cuticle increased photosynthesis.
O D. The cuticle protected reproductive structures.
SUBMIT
Answer:
a
Explanation:
The cuticle in the plants minimizes the water loss or transpiration from leaves. The correct option is A.
What is transpiration?Transpiration is the process by which water vapor is lost via the stomata of plants. When the weather is very hot, the plant's loss of water vapor cools it down, and moisture from the stem and roots moves upwards or is 'pulled' into the leaves.
The evaporation of extra water from stomata in plant leaves is known as transpiration. It is necessary for some upward movement of water in plants. It aids in the regulation of plant temperature.
To transpire, water vapor must diffuse through this motionless layer from the stomata to the atmosphere, where it will be removed by moving air. The cuticle present in the waxy leaves prevent excess transpiration.
Thus, the correct option is A.
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What function makes the HIV virus unique?
A. It has viral DNA that remains dormant until environmental conditions are right.
B. It attacks neurons in the nervous system and causes paralysis
C. It attacks and destroys certain cells in the bodies of its host organisms.
D. It has viral DNA that is transmitted through direct contact with infected persons
Answer: A
It has viral DNA that remains dormant until environmental conditions are right.
HIV is a unique human RNA virus, capable of infecting cells of the immune system.
Plz mark brainliest:)
It attacks and destroys certain cells in the bodies of its host organisms. Therefore, option (C) is correct.
What is HIV?HIV, or human immunodeficiency virus, attacks and destroys a specific type of immune cell called CD4+ T cells. These cells play a critical role in the immune system, and their destruction leads to a loss of immunity and the development of acquired immunodeficiency syndrome (AIDS). HIV is unique in that it specifically targets and attacks these cells, leading to a gradual decline in the body's ability to fight off infections and diseases.
HIV is primarily spread through sexual contact, but can also be spread through sharing needles or from mother to child during pregnancy, childbirth, or breastfeeding. HIV can lead to AIDS (Acquired Immunodeficiency Syndrome) if left untreated.
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can someone pls go answer my last question its 40 points and a brainliest i just really need it done plsss!!
Answer:
I tried it dont let me send the answer.
What is the structure for each macromolecule (what does each one look like?)
Answer:
Within cells, small organic molecules are joined together to form larger molecules. These large macromolecules may consist of thousands of covalently bonded atoms and weigh more than 100,000 daltons. The four major classes of macromolecules are carbohydrates, lipids, proteins, and nucleic acids.
el nino affects the weather worldwide.
1 True
2 False
tips bark at people BARK BARK BARK
Answer:
You talking about a dog or something
Explanation:
BARK BARK BARK BARK BARK BARK
Use fertile in a sentence.
Answer:
there is an abundance of fertile soil
climate and fertile soil are crucial for plant growth
Disagreement over or competition for a resource is known by which of the following terms?
logistics
conflict
preservation
conservation
Answer:
I think it's Conflict
Explanation:
What is the function of structure c ?
Answer:
Explanation:
Arrays allow to define type of variables that can hold several data items of the same kind. Similarly structure is another user defined data type available in C that allows to combine data items of different kinds.
Can someone tell me if I explained this right?
I'll give brainliest :}
Background info: Potato cells are placed in different levels of NaCl.
living things are made up of very complicated molecules. why is carbon important for forming these complicated molecules
Answer:
it forms very strong bonds
Explanation:
Answer:
It forms very strong bonds
Explanation: