what the type of solid materials are typically hard, have high melting pionts and poor electrical conductivities ?
I. Ionic compounds
II. Metallic structures
III. Giant covalent structures
Answer:
Ionic compounds
Explanation:
Ionic crystals are hard and brittle and have high melting points.
What is different at the molecular level between a solid and liquid?
a. The type of molecule
b. Strength of intermolecular forces
c. Speed of particles
d. Nothing
Answer:
the awnser would have to be c ! hope it helps !
Which of the following would be expected to have the greatest impact on primary productivity?
A) chemical energy
B) nutrient availability
C) solar energy
D) water availability
E) soil compaction
Answer:
the answer is solar energy
Explanation:
Drag each label to the correct image. Match the names and descriptions to the correct phase of a stars life cycle.
If the starting population of the prey is higher than the predators, the carrying capacity of the seals will be _________ than the carrying capacity of the whales.
Answer:
Explanation:
Lower
If the starting population of the prey is higher than the predator's, then the carrying capacity of the seal will be lower than the carrying capacity of the whale in future.
What is carrying capacity?Carrying capacity means the capacity of the ecosystem to provide the resources necessary for the survival of a particular species. It is different for different animals. Large animals have less carrying capacity than small animals.
In the given statement, it is given that initially the prey population was higher than the predator population. The whale is the predator of the seals. So the number of seals was higher initially. It would be advantageous for the whale.
Whales feed on the prey, and after a certain time, the prey population will decline and the whale population will increase. Initially, the carrying capacity of seals was high, but as the whale population increases, after some time the seal population will decline. In the future, the population of whales will increase more than that of seals. The carrying capacity of the seal will fall in the future.
Hence, the carrying capacity of the seal will fall in the future, but initially it was high.
To learn more about carrying capacity, refer to the following link:
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Name this animal.
Hint: It's a fox and it's very rare.
Answer:
That's a Darwin's fox.
Explanation:
What is true about the structure or function of the plasma membrane?
Hydrophilic molecules attract the water the cell requires.
It is made entirely of integral proteins.
The double layer prevents anything from entering the cell.
The processes of endocytosis and exocytosis occur here.
Answer:the first one I believe!
Explanation:
Sorry if it is wrong I have already done this and I pretty sure it’s the first one!
Answer:The processes of endocytosis and exocytosis occur here.
Explanation:just took the quiz and i got the answer wrong but i reviewed it and therefore i saw that this answer is correct (The processes of endocytosis and exocytosis occur here.)
Which word descibes a plant's response to its environment?
-Tropism
-gravity
Your body's main source of energy comes from nutrients called?
-carbohydrates
-fats
-oils
Answer:
carbohydrates
Explanation:
because they are energy providing foods
in coin on card experiment a smooth card is used
Answer:
In coin card experiment smooth card is used so that the card can slide easily from glass.
Explanation:
Brainliest please?
DNA is composed of four nucleotides what are they?
Answer:
DNA nucleotides: adenine (A), thymine (T), guanine (G), and cytosine (C)
Explanation:
PLEASE HELP ME WOTH THIS QUESTION
Answer: A. when energy is released!
Explanation: When a phosphate group is removed from an ATP, the ATP is converted to adenosine diphosphate (ADP). It also, to apply to your question, releases energy to form adenosine monophosphate (AMP).
Hope this helps, if not, comment below please!!!
(PS, I'm pretty new to this, so if I happen to be wrong, please tell me.)
:L
What is “structure is a stock that supports a single flower” please answer ASAP
Answer:
the stem
Explanation:
Which of the following statements is true regarding the movement of substances across cell membranes?
A
lons are unable to move through the phospholipid bilayer because the nonpolar tail regions of the phospholipids are hydrophobic.
B
lons are able to move through the phospholipid bilayer because the polar head regions of the phospholipids are charged.
с
Water is able to move through the phospholipid bilayer because the nonpolar tail regions of the phospholipids are charged.
D
Water is unable to move through the phospholipid bilayer because the polar head regions of the phospholipids are charged,
The statements is true regarding the movement of substances across cell membrane is that ions are unable to move through the phospholipid bilayer because the nonpolar tail regions of the phospholipids are hydrophobic.
for better understanding let's explain what the statement means
Charged molecules e.g. ions fined it difficult to move or diffuse through a phospholipid bilayer irrespective of size e.g H+ ions is unable to move across a lipid bilayer by free diffusion.from the above we can therefore say that the answer The statements is true regarding the movement of substances across cell membrane is that ions are unable to move through the phospholipid bilayer because the nonpolar tail regions of the phospholipids are hydrophobic is correct
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Answer: B
Explanation: lons are able to move through the phospholipid bilayer because the polar head regions of the phospholipids are charged.
When does the process shown occur in the
cell cycle?
Answer:
S- phase replication.
Explanation:
Genetic material present within DNA molecules regulates cell growth, proliferation, and cell repair. The long-chain helical macromolecules of these deoxyribonucleic acids are formed from complex sequences called nucleotides; these four monomers are joined by strong covalent bonds (adenine, cytosine, guanine, thymine).
DNA coding regions are called genes-they hold the cell's basic instructions. Multiple nucleotides and even several chromosomes may contain genes. Typically, gene expression entails transcription into RNA, and translation into amino acids/ proteins. In the S phase of the cell cycle, DNA is copied by polymerases. Here, the chromosomes are unwound and DNA is copied during replication to produce identical strands.
At different stages, fern plants use sexual and asexual reproduction. Which plant uses sexual
reproduction?
A. a heart-shaped plant
B. a mature fern
Answer:
A, the heart shaped plant
Explanation:
You see two zygotes(The sperm and egg) come together, thus, you can conclude that the heart-shaped plant uses sexual reproduction.
PLEASE HELP ME WITH THIS QUESTION
Answer:
its green
Explanation:
What does the presence of pillow lava says about the place?
Answer:
The presence of pillow lavas in the oldest preserved volcanic sequences on the planet, the Isua and Barberton greenstone belts, confirms the presence of large bodies of water on the Earth's surface early in the Archean Eon. Pillow lavas are used generally to confirm subaqueous volcanism in metamorphic belts.
Hope this helps :)
Procedure:
1. Investigate each of the three components of cell theory to investigate from the corkboard in
the virtual lab:
All organisms are composed of cells.
Cells come from existing cells.
Cells are the basic unit of life.
2. For each section, record your observations below.
3. Complete your report and submit it forgrading.
o
o
o
4.
Answer:cell.
[Note: This topic focuses on the cell as a system itself (single-celled organism); as a part of larger systems (multicellular organism), and sometimes as part of a multicellular organism. But they are always as part of an ecosystem.]
1. The living conditions is dependent on the structure, function and interrelatedness of cell parts. A living cell is
composed of a small number of elements - - mainly carbon, hydrogen, nitrogen, oxygen, phosphorous and sulfur.
a. because of its small size and four available bonding electrons, carbon can join to other carbon atoms in chains and rings to form large and complex molecules (macromolecules; organic building blocks / amino
acids)
b. the essential functions of cells involve chemical reactions that involve water and carbohydrates, proteins,
lipids and nucleic acids
c. cell functions are regulated; complex interactions among the different kinds of molecules in the cell cause
distinct cycles of activities - - such as growth and division
d. most cells function within a narrow range of temperature and pH; at very low temperatures, reactions are
slow ; high temperatures and/or extremes of pH can irreversibly change the structure of most protein molecules; even small changes in pH can alter how molecules interact.
e. examples of homeostasis at the cellular level to maintain equilibrium are diffusion, osmosis, and active transport
f. cellular organelles include cytoskeleton, Golgi complex, and endoplasmic reticulum
g. every cell is covered by a membrane that controls what can enter and leave the cell
h. within the cell are specialized parts for the transport of materials, energy transformation, protein building,
wasted disposal, information feedback and movement
i. most cells in multicellular organisms perform some specific functions that others do not
2. Scientists believe that prokaryotic cells (in the form of bacteria) were the first life forms on earth
a. from about 4 billion years ago to about 2 billion years ago, only simple, single-celled microorganisms
(Prokaryotic cells) are found in the fossil record
b. oncecellswithnucleidevelopedaboutabillionyearsago,increasinglycomplexmulticellular
(Eukaryotic cells)
c. in all but quite primitive cells, a complex network of proteins provides organization and shape
Explanation:
MAKEIN THIS CLEAR IM IN 7th grade trying 2 help but i have all A's
Which describes vestigial structures and how they relate to evolution?
Snakes have tiny internal hind leg bones, indicating that they likely descended from lizards.
Humans and dogs have similar bone structures in their forelimbs, indicating a common ancestor.
Dolphins and birds have structures that are adapted for swimming, but the structures did not evolve the same way.
The DNA of mice and chickens shows similar patterns, suggesting that the two species are related.
Answer:
apes
Explanation:
Answer:
Snakes have tiny internal hind leg bones, indicating that they likely descended from lizards.
Explanation:
Which of the following best explains why larger grapes have a different rate of water absorption per gram of mass than smaller grapes do?
A
The rate is slower because smaller grapes have a larger surface-area-to-volume ratio than the larger grapes do.
B
The rate is slower because larger grapes have a larger surface-area-to-volume ratio than the smaller grapes do
С
The rate is slower because smaller grapes can expand more than larger grapes to hold excess water.
D
The rate is slower because larger grapes have more volume to hold excess water than smaller grapes do.
What occurs when solar radiation bounces off a surface?
how much time does a cell spend in cytokinesis
Answer:
Not very long, this process lasts about two seconds because the body needs cells to survive.
Explanation:
Answer:
Cytokinesis performs an essential process to separate the cell in half and ensure that one nucleus ends up in each daughter cell. Cytokinesis starts during the nuclear division phase called anaphase and continues through telophase.(There is no specific time,just until the proccess is complete)
Explanation:
Usually, cells will take between 5 and 6 hours to complete S phase. G2 is shorter, lasting only 3 to 4 hours in most cells. In sum, then, interphase generally takes between 18 and 20 hours. Mitosis, during which the cell makes preparations for and completes cell division only takes about 2 hours.
The diagram shows a pedigree for three generations: grandparents, parents, and grandchildren.
Which are represented by the pedigree? Check all that apply.
The grandparents are both carriers.
One of the female children is normal.
No grandchildren show the trait.
Two of the grandchildren are affected females.
The parents have two daughters who are carriers.
Answer:
It is A and C
Explanation:
I hope this helps you because I got it wrong but it told me the correct answers, so I know they are correct!
Answer:
A and C
Explanation:
edge 2021
What body system contains a structure that can expand to hold more waste products A. Urinary System B. Endocrine System C. Respiratory System
Answer:
A. Urinary system its the one system that holds waste
Explanation:
HELP GIVING BRAINLIEST. List the five building blocks of cells and describe one important life function each one performs.
Answer:
Explanation:
The Biological Building Blocks are :
Carbohydrates.
One of the primary functions of carbohydrates is to provide your body with energy. Most of the carbohydrates in the foods you eat are digested and broken down into glucose before entering the bloodstream.
Proteins.
They also play a central role in biological processes. For example, proteins catalyse reactions in our bodies, transport molecules such as oxygen, keep us healthy as part of the immune system and transmit messages from cell to cell.
Lipids.
Lipids are essential for all life on Earth. They play many important roles in maintaining the health of an organism. Arguably the most important function lipids perform is as the building blocks of cellular membranes. Other functions include energy storage, insulation, cellular communication and protection.
Nucleic Acids.
Nucleic acids are naturally occurring chemical compounds that serve as the primary information-carrying molecules in cells. They play an especially important role in directing protein synthesis. The two main classes of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).Feb 26, 2020
Combinations.
In most living species, glucose is an important source of energy. During cellular.For example, hemoglobin is a combination of four polypeptide subunits.
plz mark as brainliest
Answer:
Protein, carbohydrates, ATP (Adenosine triphosphate), lipids and nucleic acids
Explanation:
Protein has many roles in your body. It helps repair and build your body's tissues, allows metabolic reactions to take place and coordinates bodily functions. In addition to providing your body with a structural framework, proteins also maintain proper pH and fluid balance
The primary role of carbohydrates is to supply energy to all cells in the body. Many cells prefer glucose as a source of energy versus other compounds like fatty acids. Some cells, such as red blood cells, are only able to produce cellular energy from glucose
ATP captures chemical energy obtained from the breakdown of food molecules and releases it to fuel other cellular processes
lipids store energy, insulation, cellular communication and protection
nucleic acids have to do with the storage and expression of genetic information
Match each term with the corresponding description?
I will give brain
Answer: Weathering = The breakdown of rocks into sediment Uniformitarianism = The present is the key to the past
Erosion = The process of transporting sediment to a new location
Explanation:
Have a good day ;) hope this helps.
HURRYYYY WILL GIVE BRAINLY. Even animals that live deep underwater require air to survive. Why is oxygen a necessity of life?
Answer: Oxygen fuels our cells and helps provide the basic building blocks that our bodies need to survive. Our cells combine oxygen with nitrogen and hydrogen to produce various proteins that build new cells.
Answer:
Explanation:
David is playing football when he suffers from a ruptured calcaneal tendon. The rupture is accompanied by abrupt pain and the calf muscle bulges due to the release of two muscles from their insertion. Name these two muscles.
Answer:
The correct answer is - The gastrocnemius and soleus muscles.
Explanation:
Achilles tendon or calcaneal tendon is a tendon that is inserted the gastrocnemius and soleus muscles in to heels and connects it to the calf muscles. This is a strong tendon present at lower end of calf. The insertion is takes place into the calcaneus.
The gastrocnemius and soleus muscles togeter makes a strong band of tissue, back of the leg. Achilles tendinitis is characterized as the ruptured calf muscles from the insertion due to intense exercise or running fast.
The two muscles which bulged in the calf are referred to as gastrocnemius
and the soleus.
These muscles are found in the heel and are attached to the achilles
tendon in the calf of the leg. The muscles assist in movement such as
running, walking and flexion of the legs.
In this scenario, we were told that the rupture occurred in the calf and
accompanied pain was as a result of two muscles in the calf bulging which
will most likely be the gastrocnemius and the soleus muscles.
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Explain why you know thatFrom what you learned in the diffusion handbook, what is causing the patient's low arterial oxygen? diuron caused the coral to bleach.
Answer:
Anemia , ARDS (Acute respiratory distress syndrome) and Asthma.
Explanation:
Anemia , ARDS (Acute respiratory distress syndrome) and Asthma are the causes of low arterial oxygen in patient. this low arterial oxygen is also known as Hypoxemia. in this disease, the level of oxygen decreases in the blood which is causes many problems and disorder in the body of the patient because oxygen is very important for the normal functioning of the body. Diuron causes the coral to bleach by the removal of algae attached to the coral. due to this removal of algae, the whole colour of coral become whitish.