Answer:
We know that all cells come from pre-existing cells because of cell division.
which system is responsible for preventing pathogens from disturbing homeostasis?
Answer:
The immune system protects the host from pathogenic organisms (bacteria, viruses, fungi, parasites). To deal with this array of threats, the immune system has evolved to include a myriad of specialised cell types, communicating molecules and functional responses.
Explanation:
WILL GIVE BRAINLIEST!!
Most of the world's iron ore, including that found in northern Minnesota, formed during the middle Precambrian period, ranging in age from 1.8 to 2.5 billion years old. They are composed of alternating layers of iron-rich material, most often magnetite or hematite, and silica. These iron oxide minerals formed on the ocean floor, creating the banded iron deposits you see here. What was the source of the oxygen that helped to produce these deposits?
A) The oxygen that was released into the atmosphere as a by-product of photosynthesis caused iron deposits to oxidize creating the iron oxide minerals.
B) Photosynthetic organisms making oxygen as a by-product of photosynthesis and the oxygen reacted with the iron dissolved in seawater to form iron oxide minerals.
C) The decomposition of carbon-based life forms in the oceans released oxygen and carbon dioxide. These gases reacted with the iron deposits forming the minerals mentioned.
D) In Earth's early biosphere, there were not organisms that underwent aerobic cellular respiration and an excess of oxygen built up in the atmosphere. This oxygen reacted with iron deposits to form iron oxide minerals.
Answer:
b
Explanation:
Answer:
) Photosynthetic organisms making oxygen as a by-product of photosynthesis and the oxygen reacted with the iron dissolved in seawater to form iron oxide minerals.
Explanation:
the part of the brain that coordinates the movement of skeletal muscles
function of nucleus, mitochondria ,endoplasmic reticulum, vacuoles
Answer:
nucleus...controls all the activities of the cell and carrries the genes
mitochondria..site for respiration that yields energy for the cell
endoplasmic reticulum... protein synthesis and lipids metabolism
vacuoles.... handle waste products and are responsible for regulation of osmotic pressure of a cell also
Explanation:
is this helpful?
which statements accurately reflect the permeability of the cell membrane? choose all that apply
Answer:
The hydrophilic part of the cell membrane is A, the phosphate head.
Charged molecules, such as K+ or Ca++ are unable to pass through the lipid bilayer because of their charge and must use a membrane protein to cross the cell membrane.
C, the lipid tails, are hydrophobic and repel water.
Explanation:
Which object has the most gravitational pull?
Answer:
Jupiter, the fifth planet from the Sun, has the strongest gravitational pull because it's the biggest and most massive.
Explanation:
Answer:
Jupiter
Explanation:
how to mark someone brainlist
Answer:
when two people has answered your question you will see a crown on your answer and then you select the answer that is right
Explanation:
Describe solar energy:
Answer: the light and heat that come from the sun
Explanation:
That’s it lol
the oceans lower atmosphere and contitents are the part of
Answer:
The oceans, lower atmosphere and contitents are the part of the Biosphere.
Why is it that cancer does not form every time there is a mistake during the cell cycle?
Answer:
Cells will actually kill themselves through a process called apoptosis, or it will be attacked and killed so it doesn’t spread. For example, when you are exposed to the sun for a long period of time, the solar radiation can mess with your skin cells. That’s why you get sunburned: the cells dry up and fall off. Otherwise, you could get skin cancer
The reason why cancers does not form every time there is a mistake during the cell cycle is explained below:
The following information should be considered:
Cells will actually kill themselves through a process called apoptosis, or it will be attacked and killed so it doesn’t spread. For example, when you are exposed to the sun for a long period of time, the solar radiation can mess with your skin cells. That’s why you get sunburned: the cells dry up and fall off. Otherwise, you could get skin cancerLearn more: brainly.com/question/16911495
A cross between a red cow and a white bull produces an offspring with a roan color (a spotted red-and-white color). This exhibits what type of genetic inheritance?
Answer:
co-dominance
Explanation:
in co-dominance both parents are dominant
what are the functions of the cells in the chloroplast
Answer:
Chloroplasts are plant cell organelles that convert light energy into relatively stable chemical energy via the photosynthetic process. By doing so, they sustain life on Earth. ... Chloroplasts are plant cell organelles that convert light energy into relatively stable chemical energy via the photosynthetic process.
Explanation:
Chloroplasts are plant cell organelles that convert light energy into relatively stable chemical energy via the photosynthetic process. By doing so, they sustain life on Earth. ... Chloroplasts are plant cell organelles that convert light energy into relatively stable chemical energy via the photosynthetic process.
HELP HELP HELP
Which of these areas control voluntary actions over internal and external intercostals muscles?
C. pons
A. Cerebral cortex
B.carotid bodies
D. medulla
26.
Which of the following food chains
shows one way that energy moves
through an ocean ecosystem?
A fish plankton + whale → squid
B squid whale fish plankton
C plankton squid fish whale
D whale fish plankton → squid
Answer:
C
Explanation:
ans is C Wait a minute, I'll be right back.
explain how the structure and the function of squamous epithelium in the lung are important for gas exchange(4 marks)
what types of solute molecules may be moved by facilitated diffiusion
Explanation:
Facilitated diffusion therefore allows polar and charged molecules, such as carbohydrates, amino acids, nucleosides, and ions, to cross the plasma membrane. Two classes of proteins that mediate facilitated diffusion are generally distinguished: carrier proteins and channel proteins.
What is the difference between permanent gases and variable gases in the atmosphere?
Answer:
the difference is that permanent gases have larger residence times and Variable gases have shorter residence times
the difference between permanent gases and variable gases in the atmosphere is permanent gases are gases that have a very low dew point.
What are the characteristics of the atmosphere?The Earth's atmosphere is basically composed of a mixture of gases, being 78% Nitrogen, 21% Oxygen and 1% Argon. In addition, traces of carbon dioxide, water vapor and other gases are found, but in very small amounts.
In this way, permanent gases are gases that have a very low dew point.
See more about atmosphere at brainly.com/question/13958926
Eukaryotes are __________________ and include __________________________.
Answer: Eukaryotes are the cells of animals, plants, and fungi and include membrane-bound organelles such as a nucleus and mitochondria.
Explanation: Hoped this helped! :D
What happens to the cell's
genetic information during the cell cycle?
Answer:
Mitosis results in two nuclei that are identical to the original nucleus. So, the two new cells formed after cell division have the same genetic material. During mitosis, chromosomes condense from chromatin. ... At the end of mitosis, the cell has two identical sets of chromosomes in two separate nuclei.
Explanation:
How would this impact the organism?
Answer:
how would what impact the organism?
what is happening in the convection layer of the Sun
Answer:
In the convective zone, the temperatures are cool enough—under 1,800,000 degrees Fahrenheit (1,000,000 degrees Kelvin)—that the atoms in the plasma there can absorb the photons coming outward from the Sun's radiative zone. The plasma gets very hot, and begins to rise upward out of the Sun.
the anterior pituitary hormone that controls the release of glucocorticoids from the adrenal cortex is __________.
Answer:
Adrenocorticotropic Hormone (ACTH)
Explanation:
Explanation:
Adrenocorticotropic hormone (ACTH)
A scientist wants to determine the age of a rock. The rock contains an index fossil and an ancient relative of a living organism. Which is more useful for dating the rock, and why?
Answer: Ancient Relative of a living organism
Explanation: Ancient Relative because by using the index fossil, you are also using the law of superposition. This law does not give you an accurate/specific date but instead the order they are in (i.e me saying i am older than my siblings compared to me saying i am 2 years older than them). By using an ancient relative of a living thing then we can see its phylogenic tree and measure around how old it is. Fossils also hold carbon and chemicals in there bones which allows us to use carbon dating. Carbon dating is an accurate way of measuring age.
Which of the following best predicts the effect of not having ATP available to supply energy to this
process?
A. H+ ions will stop moving through the protein.
B. H+ ions will move in the other direction through the protein.
C. H+ ions will continue to move through the protein in the original direction but at a slower rate.
D. H+ ions will begin to move through the phospholipid portion of the membrane in the original direction.
H+ ions will stop moving through the protein is the effect of not having ATP
available to supply energy to this process.
ATP is the form of energy used by cells and it ensures that cells perform their
daily activities optimally. ATP is needed in a lot of metabolic reactions and
transportation of materials within cells.
When there is a lack of ATP, it means there is no energy required to
transport or move substances within a cell. This means that the H+ ions will
stop moving through the protein and is the most appropriate choice.
Read more about ATP availability on https://brainly.com/question/7343823
which words help determine the meaning of the word vividly in paragraph 1
context clues,
the meaning is a strong image
3. An animal population decreases from 800 individuals to 600 individuals. Which of the following could explain this
change in population size?
A. The population size of the animal's predator increased.
B. The emigration rate of the animals from the population decreased.
C. The population size of the animal's prey increased.
D. The number of species competing with the animal for food decreased.
RESOURCE:
ASAP
The statement that could explain the reason for the decrease in population of an animal from 800 individuals to 600 individuals is: The population size of the animal's predator increased.
POPULATION:Population refers to a collection or assemblage of individuals of a species of organism. A population decrease means loss of individuals of a species.
Population decrease can be attributed to the following reasons:
Increase in the number of predators of that species. Emigration i.e. moving outIncrease in competition within the populationThis means that a population decrease in the animal in this question could be caused by an increase in the population of predators.
Learn more about population size at: https://brainly.com/question/2375972?referrer=searchResults
which term describes the site of a muscle attaching to the bone that moves the most?
Answer:
Insertion
Explanation:
A euglena is a unicellular organism. Choose an everyday object, such as a car, to use as a model of this euglena. Explain how the parts of the object model how the euglena's cell parts help it stay alive.
Answer:
a car:
Flagellum is a long thread-like structure that works as a navigator or a steering wheel in a car. The thin filament helps an euglena to move forward in any direction it desires.
Cell membrane is like the doors on a car. They regulate what goes in/out. The cell wall in a plant cell is like the frame on a car. The frame supports the car as the cell wall supports the plant.
The Nucleus is like the front seat of your car because the driver is in control of what the car does, goes, and what happens inside of the car.
Vacuoles is like the Trunk of your car because you store food, water and other wastes into your trunk, like were all the things go in the vacuoles.
The compression stroke in a car engine is like chloroplasts because it gas to fuel a car the same way chloroplasts convert solar energy in to chemical energy for a cell.
Mitochondrion is like the battery on a car. It gives the motor energy so it can run like the mitochondrion produces energy for the cell.
Eyespot is like a radio, because in some cars, radios pull power directly from the battery from the car battery, and this is why you will get the car radios on while the engine is off
Explanation:
The internal structures found in a typical photosynthetic Euglena are as follows:
Pellicle: A thin, flexible membrane that supports the plasma membrane and helps them to change shape
Plasma Membrane: The selectively permeable membrane that protects the inner content of the cell from the outside environment
Cytoplasm: A jelly-like substance distributed throughout the cell that contains all the cell organelles
Chloroplast: Contains the green pigment chlorophyll that helps them to produce food using sunlight by photosynthesis
Nucleus: A membrane-bound organelle that contains the genetic material, DNA. It also contains a distinct nucleolus that contains RNA and helps the cell to synthesize proteins
Mitochondria: The energy-producing organelle that forms ATP. All cellular activities such as movement and reproduction are performed using the mitochondrial energy source
Ribosomes: Consists of RNA and proteins, and are responsible for producing all cellular proteins
Golgi Apparatus: Manufactures, stores, and transports large molecules such as carbohydrates and proteins within the cell
Endoplasmic Reticulum: The extensive network of membranes that helps to package and transport proteins to different organelles. It is of two types: rough endoplasmic reticulum (RER) – containing ribosomes attached to it; and smooth endoplasmic reticulum (SER) – devoid of ribosomes
Lysosomes: Small membrane-bound organelles filled with hydrolytic enzymes that break down large molecules such as carbohydrates, fats, and proteins
Contractile Vacuole: It maintains the water and salt balance within the cell
Reservoir: The inward pocket present near the base of the flagella where contractile vacuole dispels excess water
Flagellum: A long whip-like structure attached externally to the cell body that helps in cell movement. An amoeba contains two flagella, a short one that does not protrude out of the cell, and a long one that helps in swimming
Eyespot: A region that is highly colored and contains red-colored carotenoid pigments that help in the detection of light. It is sometimes called a stigma
Photoreceptor: Also known as the paraflagellar body, it is the light-sensitive region located near the flagellum that helps to detect light. It also helps in their movement towards and away from light stimuli, a process known as phototaxis
Paramylon: They are stored starch-like carbohydrate granules composed of glucose produced during photosynthesis. Paramylon enables the organism to survive in low-light conditions when photosynthesis is not possible by acting as the food reserve for the cell. When the paramylon is enclosed in a sheath of polysaccharide, it is called the paramylon sheath of pyrenoid.
The flagellum of euglena, can be compared to the wheels of a car, as they are responsible for the movement of both.
What is Euglena?Euglena is a genus of single-celled flagellated algae that can occur either as free cells or in colony form.
What is flagellum?Euglenophytes have the presence of flagella as their main characteristic. They have two flagella, one longer than the other. The smaller flagellum does not emerge from the cell. The larger one is mainly used for locomotion.
With this information we can conclude that euglena has flagella for locomotion just as cars have wheels for locomotion.
Learn more about Euglena in https://brainly.com/question/25987383
PLEASE HELP ME I NEED HELP
Answer:
D
Explanation:
Hope this helps
Answer:
I'm pretty sure its D - hibernation
Explanation:
Torpor means a state of physical or mental inactivity, or lethargy.
Hibernation means an extended period of inactivity.
They are both used for survival in cold weather.
The species that plays the biggest role in the habitat is?
Answer:
A keystone species is a species that plays an essential role in the structure, functioning or productivity of a habitat or ecosystem at a defined level (habitat, soil, seed dispersal, etc)
Answer:
the one that does the most damage, both to its habitat and the population of species around them.
Explanation: