Answer:
B
Explanation:
Diamond is the highest on the hardness scale, while quartz is lower, only a diamond can scratch a diamond
Answer:
diamond is harder than quartz so that would be b hardness.
Which statements regarding hypotheses are true?
Check all that apply.
Answer:
Hypotheses are based on observations.
Hypotheses are formed from testable questions.
Hypotheses are tested with controlled experiments.
How and why are seeds dispersed?
Answer:
Plants disperse their seeds in lots of different ways. Some seeds are transported by the wind and are shaped to float, glide or spin through the air take weeds for example they disperse their seeds in the wind to create more around the yard
The force of gravity pulls all objects downwards. Which of these statements is correct about this law of science?
A. It is not supported by observations
B. It can be contradicted by data
C. It requires no further experimentations to determine its existence
D. It is a description in nature that will continue to change
Answer:
C
Explanation:
If you drop something on the ground and watch it fall, you are observing gravity at work, so A is not an option. All data proves this law exists, so B is not an option, and it will not continue to change, as it never has changed, so it is not D.
Answer:
C
Explanation:
I got the question right on the test
What microscopes uses one lens for magnification
There are two basic types of optical microscopes: simple microscopes and compound microscopes. A simple microscope uses the optical power of single lens or group of lenses for magnification.
hope it helps u
A red blood cell placed in distilled water will swell and burst due to the movement of Your answer: A.salt from the distilled water diffusing into the cell B.water molecules moving by osmosis into the cell C.water from the red blood cell moving into the distilled water
Why xylem and phloem are called complex tissues? How are they different from one another?
Answer:
Xylem and phloem are called complex tissues because they are made up of more than one type of cell working together as a unit. The xylem transports H2O and minerals upward from the roots to the leaves, and is composed of tracheid cells which are dead at maturity (no active nucleus, makes the tree stem hard). If plants don't have xylem, they will stay lower to the ground as it is responsible for making the tree grow upward. The ends of the xylem tubes are tapered (pointed), materials are passed along one cell at a time, and the tubes are narrow and continuous. The phloem transports sugars and proteins downward from the leaves to the stems and storage roots. The cells that make up the phloem are called sieve tubules and companion cells. The companion cells have the nucleus and the sieve tubules contain the cytoplasm.
Explanation:
My teacher helped us remember using the phrase "phloem down the river" because it sounds like 'flowing down the river' (to help remember that phloem transports downward and xylem transports upward.)
Use the mass and density data to calculate the volume of corn syrup to the nearest tenth.
Mass of corn syrup = 57.3 g
Density of corn syrup = 1.38 g/mL
The volume of corn syrup is
mL.
Answer:
the correct answer is 41.5
How is cellular respiration related to photosynthesis?
A: sugars produced in photosynthesis are digested in cellular respiration
B: sugars produced in photosynthesis are broken down into glucose through cellular respiration
C: Energy produced in photosynthesis is used to make proteins through cellular respiration
D: energy produced in photosynthesis is put into a usable form through cellular respiration
Answer:
I belive its B
Explanation:
look at the picture,hope this helps
Animal behavior is based on
Answer:
satisfying physiological needs
Explanation:
HOw could overuse of household disinfectants weaken the immune system
Answer: A
Explanation: i tock the test alredy
Answer:
I'm assuming there are options so...
I believe the correct answer is
D. By reducing exposure to pathogens and the creation of specific memory cells
It will reduce exposure to certain pathogens and prevent you from getting sick which is good, but if you don't get those pathogens, when your body does encounter it again, your Memory T cells will. it know how to fight it off.
in the phylogenetic tree shown here, which of the following loci represents an ancestor shared by species 1 and 2 but not by species 3?
A. C
B. A
C. B
D. D
15. Unlike identical twins, fraternal twins
A. are produced from two identical embryos.
B. result from the same fertilized egg.
C. are always the same sex.
D. result from two eggs fertilized by different sperm.
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Select the correct answer.
A cell phone manufacturing company wants to display the average sales of their new phone model for a particular month across six countries.
Which method of data representation would be ideal for this?
ОА.
Bar chart
OB.
Ple chart
OCHistogram
Reset
Next
Answer:
Bar Chart
Explanation:
Is shown to compare amounts, while pie charts are used for percentages
Answer:
The answer is "bar chart" i just did the test so i know this answer is right
Explanation:
A type of cellular transport is shown. Which description best identifies this type of cellular transport? Your answer: Osmosis, because energy is being used to move molecules with the concentration gradient. Active transport, because energy is being used to move molecules against the concentration gradient. Facilitated diffusion, because energy is being used to move molecules with the concentration gradient
Answer:
Active transport, because energy is being used to move molecules against the concentration gradient.
Explanation:
This picture shows active transport. That just means that energy is being used (in this case, ATP) to move molecules against their gradient (meaning, from low to high concentration). Molecules "naturally" diffuse from high-->low concentration, so to move in the opposite direction requires energy input. You can tell this because there are only 2 molecules on the top side of the membrane, but on the bottom side there are 13.
Why not A: This is not necessarily water, as in osmosis, and it's not going with the gradient.
Why not C: This is not facilitated diffusion, because molecules are going against, not with, their concentration gradient.
The description that best identifies this type of cellular transport is: Active transport, because energy is being used to move molecules against the concentration gradient.
WHAT IS ACTIVE TRANSPORT:Active transport is a type of transport that requires the input of energy in form of ATP. This is because the movement of molecules is against a concentration gradient. According to the diagram in this question, molecules are being moved into the cell with an input of ATP (energy).Therefore, the description that best identifies this type of cellular transport is: Active transport, because energy is being used to move molecules against the concentration gradient.
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Use what you know about natural selection to fill in the blanks in the hypothesis. It should answer the lab question, “What is the effect of the type of food available on the frequency of different types of bird beaks?”
Hypothesis: If the type of food available changes, then…
…because…
Answer: The independent variable of the lab is the type of food that is available to the birds. The food type changes in a given environment, then the amount of each type of bird beak will changes as birds with beaks more suited to the available food will consume more successfully over time.
Explanation:
With the changes in the available food, the frequency of the beak type will also change as birds with beaks better suited to the available food become more successful.
What are different types of bird beaks?There are many types of beaks in birds, some of these can be:
Crushing beak.Curved beak.Piercing and tearing beak.Birds of prey.Stickybeak.With the changes in the available food, the frequency of the beak type will also change as birds with beaks better suited to the available food become more successful.
Thus, this is the hypothesis which support the given scenario.
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What are some positive affects of slow change in the ecosystem
Answer: slow changes in the ecosystem can be great because then there is a higher chance of less rapid spikes in the ecosystem of pollution, carbon dioxide in the air, and chemicals that aren't good for us.
Explanation:
An organism has two different possible traits, A and B. A graph of the population is shown right. Which of the following statements is true about Trait B? Check all that apply.
It decreased in frequency over time.
It became extinct.
It is carried on a recessive allele.
It decreased in frequency over time.
Trait B decreased in frequency over time. So, the correct option is A.
What is trait?A trait is an attribute or characteristic of an organism that is influenced by its genes, according to genetics. Behavioural and physical characteristics, including intelligence and friendliness, can be altered by a combination of hereditary and environmental variables.
A trait is a distinctive quality or attribute that can be acquired by environmental circumstances, genetic inheritance, or both. In biology, traits are observable and quantifiable qualities of an organism, including its physical characteristics, behaviour, and other traits. For instance, physical characteristics like eye colour, height, and hair texture can all be passed on through genetics.
Hence, the correct option is A.
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Which of the following factors will most likely limit the light-dependent reactions of photosynthesis?
A. Light intensity and light quality
B. Temperature and light intensity
C. Carbon dioxide concentration and light quality
D. Carbon dioxide concentration and temperature
Answer:
C
Explanation:
Secondhand smoke only affects those who already smoke, due to increased smoke Innalati
4. (3.08 LC)
What factor best determines whether a person gets cancer? (2 points)
Maternal genes alone determine whether a peson gets cancer.
Paternal genes alone determine whether a person gets cancer.
A combination of environmental and genetic factors cause cancer.
Environmental factors alone determine whether any type of cancer occurs.
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All viruses causes diseases and are called parasites.. true or false please help
Answer:
False
Explanation:
theres this site called weegy just put weegy after every question and answers come up
interference competition
Define
Answer:
the competition between organisms is direct.
Explanation:
An example is the aggression display between competing organisms. This applies to both intraspecific and interspecific competition. In intraspecific competition, the competing organisms are of the same species.
how does the virus use a host cell to make copies of itself
Answer:
I wasn't quite sure what virus you were referring to in your question, but here's a general answer: Viruses use their host cells' machinery to replicate themselves.
If they are a specific type of virus known as a retrovirus, they have the ability to use the host cells' enzymes to change the RNA contained within the virus into DNA (via some type of replication I suppose).
In other cases, if they contain DNA instead of RNA (that is, the virus), they can use the host cell's machinery to create RNA via enzymes involved in transcription and/or they can incorporate that DNA into the host cell's DNA. This is part of a type of viral replication cycle known as the lysogenic cycle.
In another type of viral replication cycle known as the lytic cycle, the virus simply has itself and its genome duplicated until the host cell bursts, releasing the viral material. Here, again, the virus uses the host cell's machinery to replicate itself.
Which is one of the primary functions of food in the body
Answer:
What are the two primary functions of the food in the body? The food that we eat provides us with energy and nutrients which are used by the body for its growth, maintenance, and repair.
The food that we eat provides us with energy and nutrients which are used by the body for its growth, maintenance, and repair.
What are the 3 main functions of food?The three functions of food are:
Nutrition absorption, Pleasing psychological requirement, and Physical .requirementsThus, are used by the body for its growth, maintenance, and repair.
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What do prokaryotes have in common with eukaryotes?
A. They both have a Golgi apparatus.
B. They both have mitochondria.
C. They both have a nuclear membrane.
D. They both have a liquid cytoplasm.
Answer:
They both have a liquid cytoplasm.
Explanation:
A liquid cytoplasm is an essential part of a cell, in both prokaryotes and eukaryotes. It supports the internal components of the cell, and is the site of many vital cellular processes, such as glycolysis (the first part of cellular respiration).
The Golgi apparatus and the mitochondria are membrane-bound organelles that serve a specific purpose in eukaryotic cells. However, prokaryotic cells do not contain any membrane-bound organelles.
Prokaryotes do have a nucleus, like eukaryotes, but unlike in a eukaryotic cell, a prokaryotic nucleus is not surrounded by a nuclear membrane. Instead, it is just confined to a certain area of the cell, called a nucleoid.
Prokaryotes and eukaryotes both have a nuclear membrane. Option C
What is the commonality?
Prokaryotes and eukaryotes are two large categories of cells with notable variations in their organization and structure. They do, however, have some things in common.
The existence of a nuclear membrane or nuclear envelope is one of the similarities between prokaryotes (such as bacteria) and eukaryotes (such as plants, animals, fungi, and protists). The cell's genetic material, which can be either DNA or RNA, is encased in the nuclear membrane. It divides the cellular components into the nucleus and the remainder.
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Which of the following terms means "the system used to classify and group
living organisms"?
A. Cladogram
B. Taxonomy
C. Hierarchy
D. Taxidermy
Answer:
B. Taxonomy
Explanation:
The government has a plan to limit the effects of deforestation. It involves planting new trees to replace some of the larger trees chopped down by deforestation. In year 5: 540 new trees will be planted In year 10: 900 additional new trees will be planted Figure out how many blocks of the deforested regions will be restored in the year 5 and year 10 grids.
Answer:
i believe the answer is 10440
Explanation:
Jason joined a group that would work towards solving the workplace safety issues in his organization. Arrange Jason’s actions according to the stages of development of his group.
Answer:
- Jason asked his fellow group members about their hobbies and interests .
- Jason and another member disagree on what their respective roles should be in the group.
- Jason resolved his differences with the other group members .
- Jason began working with the group members as a complete unit .
Explanation:
The correct order of Jason's actions in the stages of the development of his group would be as mentioned above. After the first step of the formation of the group, the next step is 'storming' in which the ideas are generated. Thus, Jason asks the group members regarding their interests and hobbies as it assists in the generation of effective ideas for problem-solving. The next step would be 'norming' in which the conflicts would arise due to disagreement regarding the respective roles of group members. Then, Jason as a team member would resolve the differences among the team members to reach a common solution. After everyone agrees upon the same idea, Jason can pursue working with the group as a complete unit. These stages are crucial for the effective development of the group and achieve desired results through cooperation and teamwork.
Which of the following ecosystems would contain the GREATEST Biodiversity?
Select one:
A dessert ecosystem containing only a few species of reptiles and plants
A marine ecosystems containing some species of marine mammals
A rainforest ecosystem containing thousands of different species of plants, animals, and birds
A pond ecosystem containing several species of fish and birds.
Answer:
Explanation:
A rainforest ecosystem containing thousands of different species of plants, animals, and birds. The reason why is because it has the most diverse species of wildlife. There is alot of DIVERSITY in that ecosystem, therefore it contains the greatest biodiversity.
name 5 things that you, your community, or your country can do to reduce the amount of greenhouse gases you put into the atmosphere