"ucture and properties of Matter
Question 1 of 20
Which statement describes the difference between covalent bonds and Van
der Waals forces?
O A. Covalent bonds form from the attraction of positive ions and
freely moving electrons, while Van der Waals forces cause an
attraction between nonpolar molecules.
B. Covalent bonds form when there is an attraction between
nonpolar molecules, while Van der Waals forces cause two atoms
to share valence electrons.
C. Covalent bonds occur when two atoms share valence electrons,
while Van der Waals forces cause an attraction between positive
Answer:
Covalent bonds form when two atoms share valence electrons,
while Van der Waals forces cause an attraction between nonpolar
molecules
Explanation:
A covalent bond is said to be formed when two atoms of the same or different elements share electrons. In an ordinary covalent bond, each bonding atom contributes one valence electron while in a dative covalent bond only one of the bonding atoms provides the shared pair of electrons.
Van Der Waals forces is the major intermolecular interaction between non polar compounds. Van Der Waals forces " are caused by correlations in the fluctuating polarizations of nearby particles"(Wikipedia).
Answer:
Covalent bonds form when two atoms share valence electrons, while Van der Waals forces cause an attraction between nonpolar molecules.
Explanation:
Apex.
Which of the following describes the benefits of thinning a stand as a means of limiting disease?
O It gives weaker trees a better chance.
O It allows healthy trees to become stronger.
O The removed trees can be used for lumber.
O Most pests will not travel form one tree to another.
Mark this and return
Next
Submit
Answer:
I think it is it gives weaker trees a better chance
Explanation:
Who discovered that the planets revolved around the sun?
Copernicus
Lippershey
Gutenberg
da Vinci
Explanation:
it is COPERNICUS option A
Answer:
A
Explanation:
A population of prairie dogs shares a habitat with a population of bison. The
bison migrate to another area. How will the prairie dog population size
change?
A. It will decrease to zero.
B. It will remain approximately the same.
C. It will increase.
D. It will decrease slightly.
explain the characteristics scientists use when observing organisms and placing them in six kingdoms
Which of the following is not associated with a tRNA molecule?
anti-codon
amino acid
transcription
translation
Answer:
transcription or translation
Explanation:
well we can eliminate amino acid immediately and and anti-condon I would go for transcription but it could be translation
Choose the one that protects the investor."
the FBI
the SEC
the police
the NFL
Which of the following is NOT part of the definition of intelligence?
A) Ability to adapt
B) Ability to think and reason clearly
C) Ability to be creative
D) To act purposefully
probably d) but im not 100% sure
student use a microscope to look for structures present in 4 different cells. The students place in X for each structure that was viewed for each cell on the table shown
which cell that was viewed is more most likely prokaryote
please help
I would give brainliest and 5 stars and 10 points for the best answer
if I see a link as they answer you will be reported
Answer:
Cell X
Explanation:
Prokaryotes do not have a nucleus or chloroplasts.
Which describes gyres in the northern hemisphere?
Answer:
In the Northern Hemisphere, the gyres rotate to the right (clockwise), while in the Southern Hemisphere the gyres rotate to the left (counterclockwise). There are five major gyres in the oceans; the North Atlantic, South Atlantic, North Pacific, South Pacific, and Indian (Figure 9.1.
Explanation:
Which tree above shows a different evolutionary history from the others? Explain your answer.[ ]
Answer:
the second one is the right answer
The second evolutionary tree (2) is showing a different evolutionary history from the other trees.
What is an evolutionary tree?An evolutionary tree is a diagram/graphic used in biology to show evolutionary relationships between taxa.
The taxa located at the tree can be different species, genera, orders, etc.An evolutionary tree is monophyletic when all descendants originated from the same ancestor.In conclusion, the second evolutionary tree is showing a different evolutionary history from the other trees.
Learn more in:
https://brainly.com/question/2189834
The "splitting apart" of cells is called :
options:
cell fissions
cell division
Answer:
all
Cell division is the process by which a parent cell divides into two or more daughter cells :3
hope this helps :)
cell division.......
Place a single word into each sentence to make it correct, then place each sentence into a logical paragraph order. Blood leaving the chambers Waste products will then be ____________ by the tubules.
Answer:
Blood goes to lungs for the removal of carbondioxide and loading of oxygen whereas kidney filters the blood and sent the waste to urinary bladder.
Explanation:
Blood leaving the chambers and this blood goes to the lungs through pulmonary artery that carries deoxygenated blood. In the lungs, carbondioxide gas is removed from this blood and oxygen is added to the blood. This oxygenated blood goes to the heart through pulmonary vein and the heart pump this blood to all parts of the body. Waste products that is produced during metabolism in the liver will then be transported to the kidney for filtration by the tubules. After filtration the waste products are sent to the urinary bladder through ureters.
g The stationary phase in gas chromatography is best described as: is a column packed with solid particles that that come in contact with a liquid mobile phase is a thin liquid layer that is chemically bonded to the interior of a capillary column that comes in contact with an inert carrier gas or mobile phase is the interior surface of a untreated capillary column that comes in contact with a liquid mobile phase passing through the column a thin layer of silica or alumina particles bound to a two dimensional plate
Answer:
Hello your question is poorly written, the options and the question is all mixed up but i was able to pick out the correct answer.
answer : A thin liquid layer that is chemically bonded to the interior of a capillary column that comes in contact with an inert carrier gas or mobile phase
Explanation:
The stationary phase in gas Chromatography is best described as ( from the options listed in your question ) :
A thin liquid layer that is chemically bonded to the interior of a capillary column that comes in contact with an inert carrier gas or mobile phase
Gas chromatography is an analytical process used to separate the chemical components ( usually gases ) found in a mixture sample
What determines the direction of gas movement?
Answer: The direction of gas movement is determined by partial pressure differences. 2) At the arterial end of the pulmonary capillaries, O2 diffuses from the alveoli into the blood, while CO2 diffuses from the blood into the alveoli.
Explanation:
→ Oxygen and carbon dioxide diffuse across a respiratory membrane.
Factors determining gas movement:
The concentration gradient of the gases and the partial pressure of the gases.The differences in concentration on either side of the cell membrane.→ In diffusion of gases:
The amount of surface area available for diffusion.The distance the gas particles must travel.The higher the concentration gradient across the gas-exchanging surface, the faster the rate of diffusion across it.Learn more:
brainly.com/question/25735518
HIV is a
Multiple Choice
double-stranded DNA virus.
single-stranded RNA virus.
single-stranded DNA virus.
double-stranded RNA virus.
prion
Answer:
single strand RNA virus
Explanation:
HIV has pair of single strand of RNA
Which of the following does not influence demography?
fertility rates
growth rates
archaeology finds
factors that increase death rates
When does an infection become a disease?
Answer:
Infection occurs when viruses, bacteria, or other microbes enter your body and begin to multiply.
Explanation:
i need help with this please
Answer:
1st Activity = Cold Front
2nd= High Pressure with a Cold Front
HURRY DUE TODAY
The term for male and female reproductive structures found in separate flowers on the same plant is,
Group of answer choices
hermaphroditic
imperfect
monoecious
dioecious
Answer:
dioecious
Explanation:
The androecium is the sum of all the male reproductive organs, and the gynoecium is the sum of the female reproductive organs. If all four whorls are present, the flower is described as complete.
Which topic do biologists ask questions about and study using the scientific
process?
O A. Organisms and health
O B. Computer technology
Ο Ο Ο Ο
O C. Philosophy and art
D. Government elections
Answer:
By using, the scientific method Biology is capable of studying the different components of the organisms, including the Genes, Bacterias, and viruses, making Health one of the main subjects of study for the Biologists.
soo in my thought
A. Organisms & heath
2. What does the atomic model teach you about the ability of scientists to
study things that cannot be directly observed?
Answer:
The atomic model is our understanding of how the atom is structured. At one point in history, people believed that any substance was simply made of that substance and would retain that property no matter how small a quantity it was reduced to. Later, some argued that all matter was made of tiny particles called atoms. While this is correct, later researchers found that even the atoms were made of smaller particles called electron, protons, and neutrons. More recently, scientists have discovered quarks, tiny particles that makeup protons and neutrons.
Which of the following is an example of a simple endocrine
pathway?
a. prouth regulation be the producten nach harmone
meta con bure thyr
c. release of secrein by endere cels in duodenum due to low, pH
d. antidiuretic romane secretion de rosterior prutar in response to blood osmolaly
Answer:
get help
Explanation:
get helpjsjsjjjjsjjjjsjjsjshanasnsddjdjsjs
Which part of the brain controls body movements and processes information from the sense organs? (1 point)
Answer:
cerebral cortex
Explanation:
I'm pretty sure that is correct
HURRY DUE TODAY
Which of the following are specialized stem structures?
Group of answer choices
pistils, stamens, anthers
xylem, phloem, ray cells
corms, tubers, bulbs, stolons, rhizomes
epidermis, mesophyll, palisade layers
Answer:
d
Explanation:
Which of these organisms is a vertebrate?
Answer:
vertebrate, animals with a backbone, and invertebrate, animals without a backbone
Explanation:
A. worm - no because a worm has no back bone
B- Chimpanzee- Yes because they have a backbone
C. Bacterium- no because it is a bacteria
D. Grass- no because no backbone
so ur answer is b
Answer:
B. Chimpanzee
Explanation:
A chimpanzee is a vertebrate, not an invertebrate.
The chemical subunits called ________________ acids are joined together to form proteins.
How would altering the ph of an ecosystem affect the organisms that live there? Relate to enzyme function.
In your response include why slight changes in pH are significant to living things.
Answer:
pH: Each enzyme has an optimum pH range. Changing the pH outside of this range will slow enzyme activity. Extreme pH values can cause enzymes to denature. Enzyme concentration: Increasing enzyme concentration will speed up the reaction, as long as there is substrate available to bind to.
Hope this helps and if this is wrong sorry!!!
Identify In the Krebs cycle, what is pyruvate converted to?
Answer:
Breakdown of Pyruvate
After glycolysis, pyruvate is converted into acetyl CoA in order to enter the citric acid cycle.
Explanation:
Which of the following is not a function of stems?
Group of answer choices
anchorage
structural support
photosynthesis
water transport