The correct answer is C. Softer than diamond
Explanation:
Evan observation is related to the rock's hardness, which is usually measured on a scale from 1 to 10, in which 10 represents the hardest rock (diamond). In the case of the rock Evan found, the fact the rock can be scratched just using a fingernail shows the hardness of this rock is 2.5 or below because only minerals with this hardness can be scratched using the fingernail, while a higher hardness requires more complex tools.
Moreover, in this level of hardness, there are minerals such as gypsum or talc and these are softer than others such as feldspar with a hardness of 6 or diamond with a hardness of 10. In this context, it is safe to conclude this rock is softer than diamond. Also, hardness is not enough to determine if a rock contains two or more minerals or if it is metamorphic.
Why do cells have different shapes if most cells have the same organelles?
Answer:
cells have different shapes because they do different things
Explanation:
each cell type has has its own role to play in helping our bodies
to work properly
To be characterized as a chordate, an organism must:________.
A) possess a backbone in both the larval and adult stages
B) display all four key characteristics of Chordata in both the larval and adult stages
C) display each of the four key characteristics of the chordates at some point in the life cycle
D) possess a backbone in at least one life stage.
Answer:
C) display each of the four key characteristics of the chordates at some point in the life cycle
Explanation:
To be characterized as a chordate, an organism must display each of the four key characteristics of the chordates at some point in the life cycle. Therefore, the correct option is C.
To be characterized as a chordate, an organism must display four key characteristics at some point in its life cycle.
These characteristics include having a notochord (a flexible rod-like structure), a dorsal hollow nerve cord, pharyngeal slits or pouches, and a tail.
It is not necessary for all four characteristics to be present simultaneously or in both the larval and adult stages. As long as the organism exhibits these characteristics at some stage of its life, it can be classified as a chordate.
Learn more about chordates in:
https://brainly.com/question/31312849
#SPJ6
What structure encloses the pituitary gland?
Answer: Im pretty sure that it is the sella turcica
Explanation:
PLEASE ANSWER ILL GIVE ALL MY POINTS AND GIVE 5 STARTS AND A FAVRIOTE (Ty) The first step of the Nature of science is to come up with a __________________?
Hello There!!
I think the answer is:
Ask a question....
Because, Usually it's good to ask question before doing the next steps.
Here's a Explanation.
What if the person is new here and It didn't know where to go or how to do the project or the person were asking for.
And, If the person did it without don't know what to do it's good to ask question instead before doing it!
[tex]GoodLuck![/tex]
[tex]Loserbrazts[/tex]
ヾ(•ω•`)o
Answer:
the first thing that u do is make a observation and then you ask a question based on the observations you made
Explanation:
Hope this helps!
What is the appropriate protein portion for men?
A. 2 palm portions
B. 3 palm portions
C. 2 cupped handfuls
D. 3 cupped handfuls
Answer:
A is correct- 2 palm portions is an appropriate protein portion for men
Explanation:
Two palm portions is the appropriate protein portion needed for men. It is advised to consume 0.8 grams of fat per kilogram of body weight. So, option A is right.
Amino acids are the building blocks of proteins. Your body requires amino acids to create hormones and enzymes, as well as to build and repair muscles and bones. They can also be utilized as a source of energy.
For a typical sedentary adult, the suggested dietary allowance is 0.8 grams per kilogram of body weight.
For men, 2 palm sized portions of protein is recommended in each meal. Palm is used to measure protein and handfuls is used to measure carbohydrates.
30 grams of protein are contained in one palm serving. Two palm pieces would therefore provide roughly 60 grams of protein for a man having 50-70 kilogram, which is a sufficient quantity for most guys.
Therefore, option A, 2 palm portions of protein is the appropriate protein portion for men is the correct answer.
Learn more about protein here;
https://brainly.com/question/31017225
#SPJ6
Science question:
Explain the differences between crystal and crystallization
Pls need help the question is up there already giving BRAINLEST to a good answer
Answer:
The last choice. Think of planets, the bigger they are, the stronger they attract to one another
Explanation:
hope it helps
what is the difference between Dopamine and Seratonin
hope that helps !
5)
Which statement is an example of an inference that a student makes to determine that this is likely a plant cell?
A)
The cell is too small to be seen by the eye.
B).
The cell appears to have a nucleus and vacuoles.
Eliminate
The cell appears to have a large area of cytoplasm.
D)
The cell appears to be rectangular in shape and has a cell wall.
Answer:
D) the cell appears to be in a rectangular shape and has a cell wall
Explanation:
animal cells don't have cell walls
You travel to Mars. You obtain a specimen that appears to have cells and responds to warm temperatures. Would this be classified as living or nonliving? living nonliving
Answer:
LIVING
Explanation:
I took the test and got it right :)
the wolf population on isle royale fell to just twelve animals after the accidental introduction of canine parvovirus. years later scientists discovered that the skeletons of dead wolves had a high level of deformities in the pelvis and tail bones. how would you explain this finding
Answer:
Genetic drift caused fixation of deleterious alleles that impaired bone development.
Explanation:
With a low population, the effects of parvovirus will have a lasting impact on future generations as the alleles are less likely to be bred out of the population.
A molecule in which one or more atoms or end is slightly negative and one or more is slightly
What word defines this
Hint: 13 letters
I WILL GIVE BRAINLY
oh its polar molecule
realized
Linnaeus's ?
Answer:I dont not understand this question sorry
Explanation:
Answer and Explanation:
All modern classification systems have their roots in the Linnaean classification system. The Linnaean system is based on similarities in obvious physical traits. From the kingdom to the species. Each species is given a unique two-word Latin name.
If this isn't what you were asking then, sorry. I didn't understand the question but I sorta recongnized the word, "Linnaeus" so I thought this was what you were talking about.
Which statement about ecological organization is correct?
O An organism is part of a community.
O A community is part of a population.
O An ecosystem is made up of organisms only
O Biosphere is a part of the ecosystem
Submit
Request Answer
Answer:
Biosphere is a part of the ecosystem
The correct statement about ecological organization is:
An organism is part of a community.The levels of ecological organization are a hierarchy of categories that go from the micro to the macro (and vice versa), showing us different dimensions of analysis of living beings.
These levels are: organism, population, community, ecosystem, biosphere and biome.
The community is the level made up of a set of organisms of different species, which interact with each other in a specific area.
This includes life forms of all phyla: animals, plants, fungi, bacteria, etc. .
But in turn organisms interact, and these interactions can prevent some very similar species from coexisting (competitive exclusion principle), or the presence of a predator can cause two competitors to remain in low density and therefore there are no exclusion.
Therefore, we can conclude that the organisms of any species (plant or animal) are part of a community and that they coexist in a defined space (the biotope) that offers the external conditions necessary for their survival.
Learn more about ecological organization here: https://brainly.com/question/21696105
How can the enzyme activity be slowed down?
A. Increase temperature from 10*C to 20*C
B. Increase temperature from 20*C to 30*C
C. Decrease the temperature from 30*C to 20*C
What cause the slight positive (8+) and negative (8-) poles on a molecule of H20?
Answer:
In the covalent bond between oxygen and hydrogen, the oxygen atom attracts electrons a bit more strongly than the hydrogen atoms. The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms
Because of the water molecule's bent shape and its atoms' unequal sharing of electrons, it has partial positive (δ+) and partial negative (δ-) poles. ... A hydrogen bond occurs when molecules that have hydrogen covalently bonded to oxygen, nitrogen or fluorine interact.
Explanation:
Water is said to be a molecule made of oxygen and hydrogen atoms. There is a partial negative and positive charge at the poles of water due to hydrogen bonds, and electronegativity.
What are hydrogen bonds?Hydrogen bonds are defined as weak chemical bonds and interactions that result from the electrostatic attraction between the electronegative atom and the proton. These bonds are formed by dipole-dipole interactions.
Oxygen atoms in the water molecule are highly electronegative whereas the hydrogen atom of the water molecules is proton donors. This results in the formation of hydrogen bonds between the oxygen atom of one molecule and the hydrogen atom of the other molecules.
The electron sharing between the hydrogen and the oxygen atom tends to be unequal resulting in bonds being slightly towards the oxygen atom due to its electronegative nature. This results in the formation of partial positive and negative charges.
Therefore, hydrogen bonding results in slight positive and negative charges.
Learn more about hydrogen bonding, here:
https://brainly.com/question/10904296
#SPJ2
What makes amino acids different from each other?
A) Amino group
B) Carboxyl group
C) Hydrogen atom
D) Side chain
Following massive damage to his frontal lobes, Phineas Gage was most strikingly debilitated by: auditory hallucinations. O memory loss. O speech loss. antisocial and aggressive behavior.
Answer:
maybe he needs dietary fibre
Following massive damage to his frontal lobes, Phineas Gage was most strikingly debilitated by antisocial and aggressive behavior. The correct option is D.
What is the brain?The brain is the most important part of the body. It controls and runs all functions of the body. It is walnut shaped and present in the head of the body. The brain is divided into two hemispheres. The left and the right hemisphere.
The brain is also divided into frontal and parietal lobes. The frontal lobe is present in the front section, and it controls social interaction, problem-solving, motor functions, etc.
So if the frontal lobe will be affected, the social behavior also gets affected and the person becomes irritable and aggressive.
Thus, the correct option is D, antisocial and aggressive behavior.
To learn more about the frontal lobe, refer to the link:
https://brainly.com/question/3903313
#SPJ2
Competition is central to the theory of natural selection. Why does competition occur?
View Available Hint(s)
females must choose among possible mates
males must defend their territories
organisms are naturally antagonistic
O organisms typically produce too many offspring and resources are limited
O all of the listed responses are correct
Answer:
Competition is central to the theory of natural selection. Why does competition occur? Organisms typically produce too many offspring, and resources are limited. All organisms, including prokaryotes and eukaryotes, use essentially the same genetic code.
Explanation:
All organisms, including prokaryotes and eukaryotes, use essentially the same genetic code.
Which of the following is not a surface of the lungs?
a. Mediastinal surface
b. Cardiac surface
c. Costal surface
C. Costal surface.
Please please pleaseeee tell me if this is wrong.
Q) What does it mean by put you down? please, answere me
Answer: to criticize someone
Explanation:
Answer:
make you give up on something
hat type of cells do not undergo mitosis?
Answer:
Neurons, cardiac muscle, Red/white blood cells, skeletal muscle, smooth muscle, sperm cells, egg cells
Explanation:
The functional connectivity is greatest for which pair of species?
Wood frogs and Spotted salamanders
O Black bears and wood frogs
O White-tailed deer and Pickerel frogs
O Spotted salamanders and Black bears
O Grizzly bears and White-tailed deer
Answer:
White-tailed deer and Pickerel frogs
Explanation:
Which of the following is a synonym (word with a
similar definition) for the word degradation, used
in line 8 of the passage?
a. health
b. ruin
c. gradation
d. evaluation
Answer: B ruin
Explanation: Because i looked it up on QUIZLET !2. The loss of the structure labeled U in the
figure above results in the formation of
what? SC.8.P.8.7
A isotope
B ion
C element
D) atom
Answer:
element
Explanation:
Answer: element
Explanation:
Which statement about enzymes is true? A. An enzyme functions to decrease the rate of a chemical reaction. B. Enzymes are proteins that function as catalysts in nonliving things. C. Each enzyme can catalyze many different biochemical reactions. D. Enzymes and substrates fit together like a lock and key.
Enzymes are proteins that are like keys and fit into the lock called substrate to carry out the reactions. Thus, option D is accurate.
What are enzymes?Enzymes are involved in metabolic reactions and act as catalysts by speeding up the reactions. They do not decrease the activity function of the rate of reactions in the living things.
A specific type of enzyme can catalyst only a single type of substrate and are unique for a reaction. Enzymes and substrates act as lock and key that fits together to carry out the reaction.
The active site of the enzymes is unique and fits into the substrate to form the complex resulting in a product formation.
Therefore, option d. enzyme and substrate are lock and key.
Learn more about enzymes here:
https://brainly.com/question/1210535
#SPJ2
Phenytoin (sodium channel blocker) and ethosuximide (calcium channel blocker) are anti-seizure drugs that stop seizures from happening. These drugs work by inhibiting electrical impulses (action potentials) from occurring. Explain the importance of sodium and calcium channels on a neuron and and the reasons why action potentials do not occur when these channels are inhibited
Answer:
Phenytoin and ethosuximide are drugs that slow the recovery of the sodium channel during the inactivated state.
That is to say, they prolong the inactivation state of the channel, thus generating that in this way the neuron remains in resting potential and the action potential causing the epileptic attack is not triggered.
On the other hand, these drugs, according to the bibliography of the book "Golan, 3rd Edition, Principles of Pharmacology" have a use-dependent affect capacity, this means that those sodium channels that have more activity will be more affected, in this way Not only is epileptic shock avoided, but if the same happens independently in any neuron, it will not be able to propagate the action potential to its neighboring neurons, therefore the surrounding neurons will not be stimulated and will not be fulfilled. with the sudden rapid discharges that are the most dangerous in some cases of severe epilepsy.
It is important to understand that these drugs affect the ion channels responsible for exciting neurons, that is why by inhibiting them, a constant rest of these neurons is promoted, and they are unable to generate abrupt discharges and dissemination of the electric charge. among them generating epileptic shocks.
The ions in neurons are in charge of indicating or modulating the different neuronal states, if they are inactive, open or closed, they will directly affect the membrane potential, that is, the positive or negative charge of the neuron's membrane.
Explanation:
In order to finish completing the question, these drugs are excreted through the p450 protein, that is why if this excretion system becomes saturated because another drug is consumed that is excreted in the same way, these antiepileptics will remain longer in use. blood and in the body, generating a greater effect and enhancing adverse effects on the central nervous system.
PLEASE HELP WILL GIVE BRAINLY which sequence of base pairs complements the base pairs on the left side of the dna molecule?
Answer:
B
Explanation:
Adenine forms a pair with thymine
Cytosine forms a pair with guanine
What family is potassium
Answer:
s block
Explanation:
representative element family of metals
Use your knowledge of relationships in a food chain, describe how a cow gets the energy it needs to survive YOU MUST USE THE WORDS sunlight, photosynthesis, producer and consumer in your answer
Answer:
All energy on Earth originally comes from the Sun. Plants use sunlight in a process called photosynthesis, to make their own food and provide energy. This is why plants are producers, because they make their own food. Cows eat plants, namely grass. So, when the cow eats the grass, the energy from the grass transfers to the cow. This is why cows are consumers, because instead of making their own food, cows, like humans, must consume their food to survive.