Answer:
Scientists are constantly learning more about fossils to understand the evolution of earth and other living species.
Explanation:
It helps to study the structure of the organisms that are already extinct. Fossils are the conserved remains or traces of animals, plants, and other organisms that exist no more.
Fossils are the significant proof for evolution as it demonstrate that organism on earth was unique from the organism found on earth today. It is also used to study the tectonic history.
What is vegetative propagation?
Answer:
A type of asexual (only 1 organism needed in the process, only 1 parent) reproduction found in plants.
Explanation:
Vegetative propagation consists in the sharing of a stalk/root/other to form a new plant. So basically what happens is that a stalk/root/other from a parent plant is "left apart" so that a new organism can rise from it.
Some plants have parts that are used exclusively during vegetative propagation.
Hope it helped,
BiologiaMagister
Image: Agri Farming
VEGETATIVE PROPAGATION
regeneration of new plant from the vegetative part or organ of the parent plant is called vegetative propagation vegetative propagation is useful to spread the plant in wider reason once a mother plant gets favourable condition it is then colonized to the reason of by vegetative propagation the offspring obtained by vegetative propagation are adapted to those condition to mother plant
NATURAL VEGETATIVE PROPAGATION
BY ROOT
the intact root of several Woody plants such as it see which grow just below the soil produce but shoot just below the soil produce Adventist but should develop from these but which give rise to new plant
BY STEM
stamp is time is the source of natural vegetative reproduction and propagation in several plant several modification are found in system to perform vegetative propagation
runner offset stolon
BY LEAVES
plant develop budon their leaves these but after separating from Mother plant give rise to new plant a plant let's are produced on the margin of leave begonia is example
BY BULBILS
they are fleshy Birds which are produced in the axills of the leaves in the auxiliary Bud
ARTIFICIAL VEGETATIVE PROPAGATION
GRAFTING
adopting is the most common method of vegetative propagation in this matter variety of same is spice can be converted into plant of superior Variety in the technique that tricks of to plant our joints that you ate that grow portion of one plant stock is each joint another plant called scion
BUDDING
it is the modern method of plant propagation in this method modification of grafting but of plant is Variety is grafted on the stem of plant variety after making an oblique cut
LAYERING
the method of inductor root formation the branches while they are still attached to the mother plant is called layering
How is thermal energy transferred from earths core
Answer:
Heat from the Earth's core and radiation from the Sun is transferred to the surface of the Earth by conduction. Contact of the atmosphere with these warm surfaces transfers thermal energy, which then heats up the rest of the air through convection
Answer:
It is transferred to the surface of earth by conduction.
Explanation:
Which components of a virus is lacking a cell
Answer:
protein capsid
Explanation:
virus is a disease causing agent containing a protein capsid which is made up of protein called Capsomere. The capsid contain the genetic information or material of virus.
Virus which do not contain envelop is called naked virus.
the uses of capside are to protect the genetic material, transfer the genome and interaction with host cell.
What is biosphere????
The biosphere is any livable space on Earth.
So any space on Earth that can support
life is considered part of the biosphere.
For example, humans are part of the
biosphere since we are living on the Earth.
why crossing over is an important process for genetic variation
Answer:
so that the genetic variations are not directly exact
Explanation:
Answer:
so that the genetic variations are not directly alike
Explanation:
Did the test on edmentum and got it right.. :)
1.
Which organelle is present in the cells of a mouse but not
present in the cells of a bean plant?
A. cell wall
B.
chloroplast
C. cell membrane
D. centriole
Answer: Centriole
Explanation:
Centriole is the only cell organelle which is found in the animals cell but not in plant cell. The centriole is a cylindrical organelle which is composed mainly of the protein known as tubulin.
They are mostly found in the eukaryotic cells. It is absent in the plant cell.The centrioles are very important for the cell division and they produce microtubules which gets separated into two identical cells.
Hence, the correct answer is option D
The cell organelle that is present in the cells of a mouse but not in the cells of a bean plant would be the centriole. The correct option would be D.
Plant cells such as the ones in a bean plant have cell wall, chloroplast, and cell membrane. However, centrioles are only found in animals cells.
Centrioles in animal cells such as the one in a mouse functions as the basal bodies of spindle fiber, cilia, and flagella from which the spindle apparatus springs from during mitotic cell division. The spindle apparatus helps to organize microtubules during the mitotic process.
Plant cells have rigid cell walls that can organize microtubules during mitotic divisions. Hence, centrioles are not needed.
More on the functions of the centriole can be found here: https://brainly.com/question/11698407
When a sea urchin egg is removed from the
ocean and placed in freshwater, the egg
swells and bursts. Which of these causes
water to enter the egg?
A) Coagulation
B) Sodium pump
C) Active transport
D) Osmosis
Answer:
Osmosis is always responsible for water crossing a membrane
Explanation:
What causes water to enter the egg and cause the egg to swell and burst is osmosis. Option D is correct.
Osmosis is a process that happens when the concentration of solute in one place is higher than in the other, this causes water to move towards the place with the higher concentration of solute in order to dissolve it. In this case. the situation would be:
The sea urchin egg is in the oceanThe ocean is salt water, so the egg contains water with salt in it (salt is a solute)The egg is placed in freshwater (meaning this water does not have salt)Because the water on the outside of the egg has no salt, the concentration of solute in the egg (salt), causes Osmosis to occur. Through Osmosis, water enters the egg until it swells and then bursts.Therefore, because the egg has more solute, Osmosis causes the water to enter the egg until it bursts.
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Need help with this ready to eat foods includes
Answer:
the answer is A
Explanation:
When the outer electron shell is full in an element, this creates a __________ ___________
Answer:
When the outer electron shell is full in an element, this creates a Noble gas.
Explanation:
Noble gases are the elements that belong to group 18 in the periodic table. Noble gases are also called as inert gases. The outermost shell of the noble gases are fully filled by electrons. Due to this the noble gases don’t react with any other elements and remain isolated.
There are 6 noble gases in the periodic table. They are helium (He), Argon (Ar), Neon (Ne) Krypton (Kr), Radon (Rn) and Xenon (Xe). Noble gases conduct electricity. They are fluorescent, odorless and colorless. Noble gases are used a maintain stable elements in a constant and safe environment.
why does biomagnification has a larger impact on organisms at the top of
the food chain.
Answer:
Biomagnifications largely affects the organisms at the highest trophic level.
Explanation:
The increase in concentration of toxic chemicals while moving up in a food chain is called biomagnification. What starts out as a small concentration at the lowest trophic level turns out to become a higher concentration at higher trophic levels.
Thus it is the organisms at the highest trophic level that are the most affected. This accumulation occurs because the organisms have not evolved enough to posess mechanisms that facilitate detoxification of various substances.
Such substances are called novel substances and DDT is an example. Removal of substances like metals is also difficult. Thus a harmful chemical component travels up various trophic levels increasing in concentration at each trophic level.
Final answer:
Biomagnification results in higher concentrations of toxins in apex predators because they accumulate all the toxins present in the organisms they consume at lower trophic levels.
Explanation:
Biomagnification refers to the increasing concentration of persistent, toxic substances in organisms at each successive trophic level within a food chain. This phenomenon occurs because the toxins accumulate in the bodies of organisms, and when these organisms are consumed by predators, the toxins are transferred and magnify in concentration.
Notably, at the apex of the food chain, organisms such as swordfish have a higher concentration of toxins like mercury because they have ingested all the toxins accumulated in the bodies of organisms at lower trophic levels over time. Consumers of these top predators, including humans who consume fish like tuna or swordfish, consequently face a greater risk of toxic exposure due to the high levels of mercury and other persistent substances that have biomagnified through the food chain.
Maria walks her dog through a field full of wildflowers. When she gets back home, and begins to brush her dog, she notices seeds of many of the plants sticking to her dog’s fur. She gently removes the seeds, and tosses them out into the yard. Which will most likely cause the greatest number of seeds to germinate and grow in her backyard?
A. an unfavorable biotic factor
B. competition with another kind of organism.
C. a mutualistic relationship with another organism.
D. environmental conditions that are outside the plant’s range of tolerance.
Answer:
C. a mutualistic relationship with another organism.
Answer:
C. a mutualistic relationship with another organism.
Explanation:
A biotic factor is the living component of the ecosystem. An unfavourable biotic factor for seeds can be birds which will consume them and hence hinder their growth. Even when the seeds start to germinate competition with other species for resources like water and nutrients in soil will again slow down the growth process. Environmental conditions like temperature and pH also need to be in tolerance range of the plant otherwise it will face difficulty in growing. Hence from the given options, a mutualistic relationship with another organism will cause the seeds to germinate. For example the plant can form mutualistic relationship with nitrogen fixing bacteria which will help the plant to obtain nitrogen for growth.
how does the heart pumps blood to the body?
Answer:
Explanation:
It also carries away waste. Your heart is sort of like a pump, or two pumps in one. The right side of your heart receives blood from the body and pumps it to the lungs. The left side of the heart does the exact opposite: It receives blood from the lungs and pumps it out to the body
Answer:
Blood flows through your heart and lungs in four steps: The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle through the tricuspid valve. ... The left ventricle pumps the oxygen-rich blood through the aortic valve out to the rest of the body.
Which series correctly lists the eight taxonomic levels in order, from the broadest group to the most specific group?
species, genus, family, order, class, phylum, kingdom, domain
domain, kingdom, phylum, class, order, family, genus, species
species, genus, family, class, order, phylum, kingdom, domain
domain, kingdom phylum, order, class, family, genus, species
Answer:
B. domain, kingdom, phylum, class, order, family, genus, species
Explanation:
Answer:
Yes, the answer is B
Explanation:
I had this on a bio test and got this question correct
"Which is a characteristic of atoms?
They come in ten major types.
They are the smallest units of matter,
They can be divided,
They cannot combine together,
they are the smallest units of matter bebe:)
Answer:
The correct answer is- They are the smallest units of matter,.
Explanation:
Atoms are the smallest unit of which a matter composed of. Protons, neutrons, and electrons are present in an atom. Protons and neutrons together make the nucleus of the atom.
Protons are positively charged particles and neutrons are neutral therefore nucleus is having a positive charge due to the protons present in it. Electrons are negatively charged particles that revolve around the nucleus.
The electromagnetic force is generated between the negative charge of electrons and the positive charge of the nucleus which helps the atom to stay together in the matter.
Therefore, the correct answer is atoms are the smallest units of matter.
What is the purpose of Mitosis In single-celled organisms
Answer:
Unicellular organisms would divide as a means of reproduction. Generally unicellular organisms are some form of prokaryote in which case they wouldn't/can't preform mitosis but instead they would undergo binary fission.
The density of gas particles in a section of Earth’s atmosphere decreases. Which of the following is the most likely explanation for this event? The air pressure in that section of Earth’s atmosphere decreased. The air pressure in that section of Earth’s atmosphere increased. The total number of gas particles in Earth’s atmosphere decreased. The total number of gas particles in Earth’s atmos
Answer:
A. The air pressure in that section of Earth’s atmosphere decreased.
Explanation:
In the free air, the density of the air diminishes as the air is warmed. On increasing the pressure, the density also increases. The air is packed. The density increments as pressure increments.
The thickness and density of air decline with the increase of height because of that the surface area of the Earth's climate diminishes with increase in height, along these lines gas particles can spread out.
The density of the air is most minimal at a high rise on a hot day when the pressure of the atmosphere is low.
Which statement correctly compares nucleic acids and carbohydrates? A)They both contain phosphorus, but only nucleic acids contain hydrogen.B) They both contain carbon, hydrogen, and oxygen in a 1:2:1 ratio. C)They both contain carbon, but only carbohydrates contain oxygen.D) They both contain carbon, but only nucleic acids contain phosphorous
Answer:
D)They both contain carbon, but only nucleic acids contain phosphorous.
Answer:
it is D)
Explanation:
Select all that apply. What are the nutrients needed for good health?
carbohydrates
sugars
minerals
lipids
vitamins
proteins need some help ill mark as brainliest
Answer:
vitamins prteins minerals
Explanation:
vitamins proteins and minerals
What type of force is applied on a football to move it forward?
Answers are
Balanced force in backward direction
Unbalanced force in forward direction
Non contact force in backward direction
Gravitational force in downward direction
Btw im in FLVS
Answer:
B. Unbalanced force in forward direction.
Answer:
B. Unbalanced force in forward direction.
Explanation:beacause idid that test
HELP! True or false. A closed switch mans the electricity can flow freely through the circuit.
Answer:
True
Explanation:
An electric current can
only flow when there is
a closed path in which
electrons can move.
Jordan is an animal lover and wants to protect animal species and their habitats. A career in which field would allow him to do so? A. research B. wildlife conservation C. education D. pathology
vet science
Answer:
B. wildlife conservation
Explanation:
Answer:
The answer you are looking for is B, wildlife conservation. This is because you can eliminate research and education because both of those answers don't do much in protecting animal species. You can also eliminate Pathology since Pathology for animal injuries.
Explanation:
What Made Albert Einstein Smart
Answer:
he was considered a genius because of his helpful contribution I science and math
Albert Einstein's intelligence stemmed from his deep curiosity, rigorous thought experiments, and the ability to challenge existing norms, which led him to revolutionize physics with his theory of relativity.
Explanation:What made Albert Einstein smart is a question that delves into various facets of his personality, his intellectual curiosity, and his approach to scientific inquiry. Einstein, renowned for his theory of relativity and as a symbol of high intellect, attributed his success not just to his intelligence but also to his persistent curiosity and the ability to question the obvious. Albert Einstein was not content with accepted norms and displayed an unparalleled dedication to understanding the mysteries of the universe.
From a young age, Einstein showed a proclivity for clear thinking and thought experiments ('Gedankenexperiment'), a method he employed to conceptualize and solve complex problems before they could be tested experimentally. His ingenious use of deductive reasoning and intuitive insight, coupled with his deep knowledge and experience, allowed him to challenge and eventually revolutionize modern physics with his theory of relativity.
Einstein's intellectual journey highlights the importance of not just raw intelligence, but a relentless pursuit of knowledge, a robust imagination, and a fearless approach to challenging the status quo. His legacy teaches us that brilliance is as much about the questions we dare to ask as it is about the answers we discover.
Typically, nitrogen atoms are composed of seven electrons, seven protons, and seven
neutrons. An isotope of nitrogen could
a. be negatively charged.
b. have more than seven electrons and more than seven protons.
c. have more than seven protons.
d. have more than seven neutrons.
Answer:
d. have more than seven neutrons.
As the nitrogen have seven electrons, seven protons, and seven neutrons. An isotope of nitrogen could have more than seven neutrons. The correct option is d.
What is an isotope?Isotopes are sort of an element family that have the similar number of protons but varying in the number of neutrons.
The atomic number of an element on the Periodic Table is shown by the number of protons in its nucleus. Carbon, for instance, has six protons and is atomic number 6.
Isotopes can form either spontaneously (innately) through radioactive decay of a nucleus emission of energy in the form of alpha particles, beta particles, neutrons, and photons.
It can either by artificially via accelerators or neutrons in a nuclear reactor by bombarding a stable nucleus with charged particles via accelerators or neutrons.
Nitrogen comprised of seven electrons, seven protons, and seven neutrons. A nitrogen isotope will have more than seven neutrons.
Thus, the correct option is d.
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Which chemicals were formed in the brownish liquid in the flask and why was this significant?
Answer: The Miller-Urey Experiment
He based his calculations on the (then) widely held view that the early atmosphere was reducing, and concluded that the main constituents were methane (CH4), ammonia (NH3), hydrogen (H2), and water (H2O).
The brownish liquid in a reaction could be significant due to its role in demonstrating chemical change, as in the historical production of Cadet's fuming liquid, or in an educational setting, such as the reaction of a copper penny with nitric acid to form nitrogen dioxide.
Explanation:The brownish liquid in the flask which was formed by a chemical reaction is significant as it represents the transformation of substances through chemical change. If we refer to the historical context of Cadet's fuming liquid, it was accidentally produced by the French chemist Louis Cadet in 1760 when he was working on inks by heating arsenic oxide and potassium acetate, producing a red-brown oily liquid. This discovery was key in showing chemical synthesis and the potential hazards associated with chemical reactions, given the toxicity of the compounds involved.
In the educational setting, the generation of a brownish vapor observed when a copper penny is reacted with nitric acid signifies that a chemical reaction such as the formation of nitrogen dioxide, a brown gas, is occurring. This reaction demonstrates the principles of chemical reactions and their products. Furthermore, understanding these reactions allows insight into more complex processes such as those occurring within the human body, as every living organism is a complex system of ongoing chemical reactions.
Place the stages of a high-mass star's life cycle in the correct order, from a star's birth to its death.
supernova
protostar
nebula
neutron star
Supergiant
Answer:
Nebula --> Protostar --> Supergiant --> Supernova --> neutron star
Explanation:
A high mass star starts as a big cloud of dust and gases. This cloud is called a nebula. When these clouds pick up some momentum, it condenses into a protostar.
The protostar will continue to condense because of its increasing gravity. The hydrogen atoms will start to collide and the pressure and temperature will trigger nuclear fusion. This is when the start will enter its main sequence where the outward force of nuclear fusion is balanced with its inward force. It will remain at this state until it runs out of hydrogen atoms.
When hydrogen stats to run out, the gravitational force will be greater than the force of nuclear fusion causing the core to shrink. Nuclear fusion then will start to occur outside the core and the star then expands into a Super giant.
The expansion of the star enables the star to create heavier elements like helium which then undergoes fusion itself and becomes a source of fuel for the star. When helium slowly depletes, it pulled into the core by gravity and all that is surrounding the core will explode , making it a super nova which marks the end of a star.
Two things can result from a supernova, a neutron star or a black hole. For bigger stars, the result would be a black hole. If the mass of the star was at least three times greater than our sun, then it will implode and become a black hole. If it is less, then the core would form a neutron star.
Answer:
nebula ---> prostar ---> supergiant ---> supernova ---> neutron star
Explanation:
I just did the assignment on edge 2022.
mycotoxins are most closely associated with
Answer:
Fungus
Explanation:
Why do sodium ions need channels in order to move into and out in f cells?
Answer:
Firstly they are too big to pass through the natural pores of the cell membrane the way water molecules do through aquaporins. Secondly, they would not pass through the hydrophobic layer of the cell membrane because the sodium ions are charged. This is because the hydrophobic layer does not interact positively with charged molecules/ions. Additionally, because sodium ions would be traveling up the concentration gradient into the cell, there is need for active transport. The channels proteins are able to harness energy from ATP to actively transport the sodium ions into the cell.
Final answer:
Sodium ions require sodium channels to enter or exit cells because they can't diffuse through the hydrophobic cell membrane due to their charge. Sodium channels facilitate the movement of Na+ ions without the cell using energy; this is important for nerve signals, muscle contraction, and ion balance.
Explanation:
Sodium ions (Na+) require special structures known as sodium channels to move into and out of cells. These channels are necessary because sodium ions are charged particles and cannot diffuse through the hydrophobic (nonpolar) interior of the cell membrane. The lipid bilayer of the membrane acts as a barrier to charged substances, which means that ions like sodium cannot cross it without help.
Sodium channels are protein complexes that span the membrane, creating a pathway that allows Na+ ions to move down their concentration gradient, facilitated by the structure of the channel without the cell expending energy, a process known as facilitated diffusion. This movement is crucial for various cellular functions, including the generation of electrical signals in nerve cells, muscle contraction, and maintaining the overall ion balance within the cell.
The sodium-potassium ATPase is another crucial membrane protein that uses energy to move potassium ions (K+) into the cell while pumping sodium ions (Na+) out, creating an electrochemical gradient. Potassium channels, which are open most of the time, allow K+ to diffuse out of the cell to maintain the gradient. The difference in ion concentration on either side of the membrane is essential for many cell functions.
what is the cemical equation for photosynthesis
C6H12O6 is the chemical equation for photosynthesis.
Happy to help!
Answer: 6CO2 + 6H20 + (energy) → C6H12O6 + 6O2
Carbon dioxide + water + energy from light produces glucose and oxygen.
I hope this helps you. If not, so sorry!
Identify the the correct base pair
AT
CA
AG
GT
Final answer:
The correct base pair is AT (adenine-thymine), as per DNA base pairing rules where A pairs with T, and C with G.
Explanation:
The correct base pair among the given options is AT (adenine-thymine). In DNA, the nucleotide bases pair up with each other following specific rules: adenine (A) always pairs with thymine (T), and cytosine (C) always pairs with guanine (G). This is known as the base-pair rule, a fundamental principle in the structure of DNA. These base pairing rules are crucial for the conservation of the genetic information during cell division and replication processes.
is wool production in sheep continuous or discontinuous?
Answer:
morphological
Explanation:
also known as discontineous variation it deals with body structures