Answer:
Cell membrane - Controls the passage of materials into and out of a cell
Flagella - Acts as a whipping propeller, moving a cell through its environment
Lysosomes - Digest foreign substances and worn out cell parts
Mitochondria - Produce energy (ATP)
Ribosomes - Makes proteins
Cilia - Structures shaped like small oars that beat in unison to move the cell or the liquid around it
Nucleus - Protects DNA and is considered the “brain” of the cell
Golgi Apparatus - Modifies and packages proteins
Explanation:
The cell membrane separates the inside of the cell from the external environment, and regulates substances that enter and leave the cell.
The nucleus contains the genetic material of the cell, and therefore controls all cellular activities. It is also the site of transcription of mRNAs. mRNAs are translated at ribosomes.
The ribosomes are like factories that synthesize proteins through the process of translation.
When proteins have been produced, they are modified, packaged, and transported to their specific sites by the Golgi apparatus.
Mitochondria are energy-producing organelles - the site of cellular respiration.
Lysosomes are membrane-bound sacsin which waste products are digested
Some cells have cilia, which are hair like-structures that beat in unison to aid in locomotion. Another locomotory organelle is the flagella, which is a whip-like structure that helps some single-celled organelles to move.
An independent variable is the item that was changed in the experiment. What is the independent variable in this experiment?
Answer:
The independent (or manipulated)variable is something that the experimenter purposely changes or varies over the course of the investigation. The dependent (or responding) variable is the one that is observed and likely changes in response to the independent variable.
Explanation:
please mark as brainlist answers
2. Which of the following would not represent an ecosystem?
A. A lake
B. A drop of pond water
C. A fish tank
D. Magma or fresh lava
Answer:
D. Magma or fresh lava :)
I need help ill. Give brainless
Answer:
letter B.
Explanation:
Which is a gamete?
A. Estrogen
B. Embryo
C. Cervix
D. Egg
Explanation:
egg is ideal female gamete
A student is studying Earth's layers. She is trying to determine how temperature and density change from one layer to another. Which relationship that exists between Earth's layers did the student most likely find?
A. The temperature of Earth's layers decreases with depth, while density increases with depth.
B. The temperature of Earth's layers increases with depth, while density decreases with depth.
C. The temperature and density of Earth's layers decrease with depth.
D. The temperature and density of Earth's layers increase with depth.
Answer:
The answer is D!
As one gets closer to the Earth's core, temperature, and pressure rise gradually. Thus, option D is correct.
What are the factor involving in the earth layer study?Gravity will tug on something more strongly the denser it is. The consequence is that less dense layers migrate away from the Earth's core, while the densest components are attracted closer to it.
Because it is the densest and is formed of solid iron and nickel, the inner core is located near the center of the Earth.
The surface, where the water is the warmest, has the lowest density. The pycnocline is a zone of rapidly rising density with depth that is present as depth increases.
The density has an inverse relationship with volume and a direct relationship with mass. As a result, the density rises as the volume shrinks.
Therefore, The temperature and density of Earth's layers increase with depth.
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Please do not copy and paste others work I need this soon
Write a paragraph that provides examples of each stage of volcanic activity, a description of the volcano, and facts about each stage.
An active volcano is a volcano that has had at least one eruption during the past 10,000 years. An active volcano might be erupting or dormant.An erupting volcano is an active volcano that is having an eruption...A dormant volcano is an active volcano that is not erupting, but supposed to erupt again.An extinct volcano has not had an eruption for at least 10,000 years and is not expected to erupt again in a comparable time scale of the future.
Explanation:
Lactic acid fermentation occurs in ____.
A.
bread dough
B.
an environment containing oxygen
C.
muscle cells
D.
mitochondria
Answer:
B an environment containing oxygen
Explanation:
Answer:
C. muscle cells
Explanation:
1. How many degrees of longitude are they apart for the following points:
B and F
E and G
C and I
G and J
F and C
2. How many hours apart are
B and F
E and G
C and I
G and J
F and C
Answer:
1. i love pizza
Explanation:
4 wow quizzy Please read this carefully A fair warning, Look out for a Discord user by the name of with the tag #2911. She is going around sending friend requests to random Discord users, and those who accept her friend requests will have their accounts DDoSed and their groups exposed with the members inside it becoming a victim as well. Spread the word and send this to as many Discord servers as you can. If you see this user, DO NOT accept her friend request and immediately block her. Our team is currently working very hard to remove this user from our database. Please stay safe. -Discord team
Copy and paste this to all the servers you are in
Which of the following correctly describes the outcome of meiosis?
Answer:The cell produced at the end of meiosis contained half of the number of chromosomes as the parent cell
Explanation:hope this helps and happy hallowen :D
Answer:
A. Four haploid daughter cells that are genetically different.
Explanation:
Question 7 Which of the following is NOT paired correctly? fat- lipid starch-nucleic acid glucose Carbohydrate enzyme protein
Answer:
Starch-nucleic acid is not paired correctly.
which is one benefit that mangrove trees provide to surrounding coastal wetlands
Answer:
They hold soil in place
Explanation:
took it on edge
Which of the following BEST describes an
asteroid?
A. small, rocky object usually found between Mars and
Jupiter
B. eruption of heated gas from the sun's surface
C. chunk of the moon's surface that separated due to
seismic forces
D. a comet that originated in the Oort Cloud
Answer:
i would go with A nut i might be wrong
sorry if i am
Explanation:
Answer:
A. small, rocky object usually found between Mars and
Jupiter
Explanation:
because in outer space the asteroid are keeping mars and jupiter from crashing
why do some areas have more acid rain in other places
Answer:
this due to the environment, especially if it is an industrial area,because when different gases or smoke are in the air they combine thereby causing acid rain .
What particles cannot pass through the cell membrane
Large molecules such as proteins and nucleic acids, charged particles (ions), and polar molecules such as glucose are examples of particles that cannot pass through cell membranes.
The lipid bilayer of the cell membrane makes it difficult for charged and polar substances to pass through. However, small, non-polar molecules and compounds that are lipid soluble can readily diffuse across the cell membrane. Aquaporins make it easier for water molecules to do this by facilitating osmosis.
The selective permeability of the cell membrane enables it to control the passage of molecules, preserving cellular harmony and functionality. In contrast, diffusion allows the easy passage of small, non-polar molecules such as oxygen, carbon dioxide, and lipid-soluble compounds through the cell membrane.
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what is the relationship between enzyme activity and 3d shape of an enzyme
Answer:
The reaction catalyzed by an enzyme is very specific. Most enzymes are proteins with unique three-dimensional configurations based on their amino acid sequence. The specificity of an enzyme can be attributed to the compatibility between the shape of the enzyme's active site and the shape of the substrate
Answer:
enzymes have a 3D shape to basically fit, like a puzzle and if it doesnt fit there is no activity
Explanation:
What pair of structures do prokaryotes have?
draw a well labelled diagram of a leaf structure and explain how the stomata ,the cuticle and the vascular bundle works
Answer:
A well labelled diagram of a leaf structure
Explanation:
Answer:
Vascular bundles are a collection of tube-like tissues that flow through plants, transporting critical substances to various parts of the plant.The cuticle reduces the rate of water loss from the leaf surface.Stomata are tiny holes found in the underside of leaves. They control water loss and gas exchange by opening and closing. They allow water vapour and oxygen out of the leaf and carbon dioxide into the leaf.For which of the following reasons do small, isolated islands have a greater rate of
species extinction than larger, less isolated islands?
Answer:
Larger islands that are large and close to the mainland are shos lower rate of extinction due to the fact that the species present have more space so there will be more resources available in comparison to smaller islands where limited space and limited resources available.
Extinction is greater on islands isolated due to the unlikelihood of immigration and as it is opposite to the island close to the mainland and competition is more in isolated islands.
Lack of immigration, lower space and resources are the reasons small isolated islands have a greater rate of extinction.
Large islands have large space for the growth of an organism as well as more resources which lowers the competition between organisms while on the other hand, small islands have lower space for growth and low amount of resources which causes to more competition leads to greater rate of extinction so we can conclude that lack of immigration, lower space and resources are the factors that affect the rate of extinction.
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___ in the eye operate best under bright light conditions
A. Cones
B. Rods
C. Retinal ganglion cells
D. Striate cortex
Answer:
its c
Explanation:
An atom contains 15 electrons. How many energy levels would it have?
It would have 8 energy levels
Answer: i'm pretty sure its 3!
Explanation:
V. Fill out table below
A positive ion
A negative ion
A positive ion
A negative ion
1. If an atom loses an electron, it becomes... (highlight one)
2. If an atom gains an electron, it becomes... (highlight one)
3. A hydrogen atom loses an electron. It becomes... (highlight one)
4. A sodium ion (Na) can ionically bond with which? (highlight one)
How do you know this?
H
H Н
K
ci
True
False
5. If an atom gains or loses a neutron, the charge of that atom changes. (highlight one)
6. If an atom gains or loses an electron, the atomic mass of that atom changes. (highlight one)
True
False
7. If an atom gains or loses a neutron, the atomic mass of that atom changes. (highlight one)
True
False
8. An atom with
valence electrons can covalently bond with another atom. (highlight one)
True
False
How do you know this?
Answer:
detail is given below
Explanation:
We know that an atom consist of electrons, protons and neutrons. Neutrons and protons are present inside the nucleus while electrons are present out side the nucleus. Electron has a negative charge and is written as e⁻. Proton has positive charge P⁺ and neutron is neutral n⁰ .
The number of electron or number of protons are called atomic number while mass number of an atom is sum of protons and neutrons. The number of protons and electrons are always equal to make the atom electrically neutral and when an atom loses its valance electron the number of protons increases and thus positive charge increased and atom form cation.
Cation formation:
X → X⁺ + e⁻
When an atom gain electron negative charge increase because of more number of electron thus atom form negative ion or anion.
Anion formation:
X + e⁻ → X⁻
1) If an atom loses an electron, it becomes... (positive ion)
2) If an atom gains an electron, it becomes... (negative ion)
3) A hydrogen atom loses an electron. It becomes...(positive ion)
4) A sodium ion (Na) can ionically bond with which?
Sodium ion (Na⁺) can ionically bonded with Cl⁻ , thus both form salt which sodium chloride. Sodium ion can not bonded with hydrogen and potassium because both are also form cation.
5) If an atom gains or loses a neutron, the charge of that atom changes.
The given statement is false because neutron is neutral so when it added or removed from an atom there will be no effect on charge.
6. If an atom gains or loses an electron, the atomic mass of that atom changes.
The given statement is also false because atomic mass is sum of number of neutron and protons. So when electron is added or lost by an atom there will be no effect on atomic mass.
7. If an atom gains or loses a neutron, the atomic mass of that atom changes.
The given statement is true. Atomic mass is sum of number of neutron and protons. So when neutron is added or lost by an atom there will be effect on atomic mass. The atomic mass will be increase or decreased.
8. An atom with valence electrons can covalently bond with another atom.
The given statement is true. The valance electrons of an atom are involved in bonding. It could ionic, covalent or any other type.
A cell is most likely to be a plant cell if it contains: O A. chloroplasts and a cell wall. B. RER and SER. O C. mitochondria and amino acids. OD. DNA and RNA.
A
Explanation:
Only plants cells have chloroplast and a cell wall.
Hope this helps! :)
Which test would show positive for orange juice
Answer:
Lugol's test
Explanation:
Orange juice contains varied vitamins such as vitamin C. The test that shows positive results for orange juice is Lugol's test.
Chitin is a polysaccharide found in the exoskeleton of insects. The diagram below shows a chitin monomer.
To which major category of biological molecules does chitin belong?
proteins, because chitin forms the flexible joints of an insect’s shell
nucleic acids, because chitin provides the blueprint for insect body plans
lipids, because chitin serves as an insect’s insulation from their environment
carbohydrates, because chitin is used for structural support in the insect’s external skeleton
Answer:
Carbohydrates
Explanation:
Chitin is a polysaccharide found in the exoskeleton of insects. carbohydrates is the chitin monomer, because chitin is used for structural support in the insect’s external skeleton. Hence Option D is correct.
What is chitin?
Chitin is a large structural polysaccharide found in the exoskeletons of insects, cell walls of fungi, and some in invertebrates.
This versatile molecule are observed in insect wings, mixed with with calcium carbonate to make a shell of a clam.
Chitin and cellulose are composed up glucose monomers but keratin is a fibrous protein.
Structurally Chitin is different from cellulose by the replacement of hydroxyl group (OH) with amyl group attached which have carbon and nitrogen in glucose monomer.
Due to its biodegradability, it is used in most of the industries, in medical application, dyes, glues etc.
Hence Option D is correct.
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What are large molecules made up of smaller molecules called?Untitled
Question
A large molecule made up of smaller molecules is called a macromolecule. Macromolecules are also sometimes called polymers.
2. A planet that forms by gravitational collapse should:
A. be gas all the way down to the core.
B. be solid all the way down to the core.
C. have a liquid core surrounded by gas.
D. have a rocky core surrounded by gas.
Answer:
A
Explanation:
what is frictional force?
Which shows one example of a physical change and one example of a chemical change?
Show Your Work
boiling water and melting wax
rusting iron and baking a cake
dissolving powder and shredding paper
freezing water and burning coal
An example of physical change is the freezing of water, while an example of chemical change is the burning of coal. Thus, the correct option for this question is D.
What is Physical change?Physical change may be defined as a type of change that only involves alterations in the physical properties of the matter. Examples include the boiling of water, freezing of water, etc.
A Chemical change may be characterized as a type of change that only involves alterations in the chemical properties of the matter. Examples include burning coal, rusting iron, mixing acids and bases, etc.
In a physical change, there is no new substance is synthesized, while in a chemical change one or more new substances are formed.
Therefore, freezing water is an example of physical change, while burning coal is an example of chemical change. Thus, the correct option for this question is D.
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A block of lead has dimensions of 4.50 cm by 5.20 cm by 6.00 cm. The block weights 1587 g. From this information, calculate the density of lead.
Answer:
11.3 cm/g
Explanation:
A student wants to find out if the green coloring in grass is a mixture of dyes. He uses a solvent to dissolve the green coloring from some grass. He then separates the solution of the green coloring from the remaining grass. Which of these methods is used to separate the solution of the green coloring from the remaining grass?Immersive Reader (1 Point) Boiling Evaporation Chromatography Filtration
Answer:
The correct answer is - filtration.
Explanation:
Filtration is the extracting the dissolved or suspended solids from a liquid or solvent passed from a substance with small pores, called filter, that separates the solid with a larger size than the pores of the filter. The liquid goes through the filter known as filtrate.
In the given case, the remaining grass can be separated from the solvent by the process of filtration. Pass the remaining grass with filtrate through the filter.
The correct answer is - filtration.