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1. The first person to describe cells was:
Answer:
Robert hooke
Explanation:
The cell was first discovered and named by Robert Hooke in 1665. He remarked that it looked strangely similar to cellula or small rooms which monks inhabited, thus deriving the name.
What is this insect? 20 points to anyone who can answer! (Will give brainliest to the person who ends up answering correctly)
Found it on mattress of carpeted bedroom
Answer:
It must be a beetle.
Be careful, because Bed bugs are considered to be dangerous; however, an allergic reaction to several bites may need medical attention.
what are the two muscles that allow you to raise your lower arm
Answer:
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✏ Biceps & Triceps.
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✏ Muscles of both the upper arm and forearm control movement of the forearm. The biceps brachii flex the forearm and work with the supinator of the forearm to rotate it so the palm faces upward. The triceps brachii extend the forearm.
The symptoms of acronogaly
are all except
A. Impaired glucose tolerance
B. Dry skin
C. Impaired thyroid function and construction
D. Impaired gonadal function
E. Obstruction sleep apnea
Compared with vertebrates, most invertebrates:
A. require faster delivery and greater quantities of nutrients
B. have more complex layers of cells
C. require a higher level of oxygen
D. have slower distribution of blood
Answer:
B po trust me pinag aralan ko n apo iyan thankss po gusto ko lang pong makatulong
Describe the difference between the level of classification known as a domain versus species. I will give brainliest
The major levels of classification are: Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.Explanation:
1
Which of the following types of pollution can cause eutrophication in a body of water?
residential
construction
agriculture or all of the above
Which of the following is not a characteristic of enzymes?
Each is used to break down substances.
Each has a specific substrate.
Each has an optimal temperature and pH.
O
Each has an active site.
Answer:
Each is used to break down substances.
Explanation:
Enzymes merely speed up a chemical reaction, not necessarily break down substances.
Each enzyme is used to break down substances is not a characteristic of enzymes. The correct option is A.
Thus, enzymes aren't just utilized to degrade things. Enzymes perform additional crucial tasks in addition to being essential for the breakdown (catabolism) of substances. In living things, enzymes operate as biological catalysts to quicken chemical processes.
Enzymes achieve this by reducing the activation energy needed for a reaction to happen and thereby speeding up the reaction rate. While some enzymes are engaged in the breakdown of chemicals, others are involved in the synthesis or modification of other molecules (anabolism).
Thus, the ideal selection is option A.
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HELP
Which of these is not a process that can cause speciation?
Answer:
I believe it's D. asexual reproduction
A wasp is a flying insect. In wasps, wing length is coded for by a single gene. Two scientists studying wasps hypothesize that short wings are recessive to long wings. Which of the following observations best supports this hypothesis?
A. Wasps with long wings are less likely to survive.
B. Wasps with long wings can produce offspring with short wings.
C.Wasps have wing lengths ranging from very long to very short.
D.Wasps with short wings prefer to mate with wasps with long wings.
Answer:
answer c is your answer final answer
Answer:
Your Answer Is C
Explanation:
Wasps have wing lengths ranging from very long to very short.
Hope I Helped!?
2. Carbon trading is a mechanism by which companies may purchase the right to pollute over a set period, up to a certain quota, established by the government. In the market-based
approach, what's this tool called?
A. Market-based quota
B. Property rights instrument
C. Market-based instrument
D. Tax break
Answer:
Explanation:
Market-base instrument
Market-based instruments
What is carbon trading ?
Carbon trading is the process of buying and selling permits and credits that allow the permit holder to emit carbon dioxide.
What are market-based instruments ?
Market-based instruments (MBIs) are taxes, charges, levies, tradable permit schemes, deposit refund systems, subsidies etc.
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Question 18 (5 points)
During which stage of the cell cycle does the cytoplasm of a cell divide?
interphase
1)
cytokinesis
synthesis
prophase
B
ОООО
0
Answer:
I think brown going in a little while I’m on my way to work now I’m going in a little bit I’m late I can get my car done with you I don’t need you I can do you see you I don’t have any time I will miss it bye thanks bye bye coke bye bye hi bye bye coke bye bye hi hi Johnny for you
Explanation:
write out the pathway that a drop of blood takes, starting in the right ventricle. As you describe the path, include the names of the blood vessels and the valves, and indicate if the blood is oxygenated or deoxygenated g
Answer:
The correct answer is - Right atrium, right ventricle, pulmonary arteries, lungs, pulmonary veins, left atrium, left ventricle, aorta, arteries, arterioles, capillaries, venules, veins, vena cavae
Explanation:
Throughout the vascular system or cardiovascular system, the drop of deoxygenated blood moves through right atrium and right ventricle to the lungs within the pulmonary arteries. Then the oxygenated blood transfers via pulmonary veins t the left atrium of the heart that pumps the oxygenated to the rest of the body by the left ventricle through the aorta.
Arteries help in the flow of the systemic circulation then blood moves from arterioles to capillaries. The deoxygenated blood is returned through the veins to the heart that come to the superior and inferior vena cava and back to right atrium and cirlculation repeat again.
Which statement correctly identifies one advantage and one disadvantage of relying on trains for
transportation?
Your answer:
Trains are inexpensive to build, but require too much open land.
O Trains are convenient and comfortable, but have a limited range.
Trains can damage habitats from pollution, but can be easily rerouted.
Trains can reduce congestion, but typically increase overall fossil fuel use.
Trains can have inconvenient schedules, but produce less pollution than cars do.
Answer:
The correct answer is - Trains can have inconvenient schedules, but produce less pollution than cars do.
Explanation:
Trains are expensive to build and also required land for making routes and stations and platforms for passengers but that can be reimbursed by fare in a longer time period.
Trains also produce pollution but in comparison to cars these are way less contribute to the pollution, However, these are not convenient as they start and reach at a specific time and also sometimes not comfortable like cars.
Within which structure in the human body does
specialization of parts of the developing baby take
place?
A) ovary
B) uterus
D) pancreas
C) testis
4. which of these substances cannot pass through cell membranes?
A.Starch. B.Glycerol.
C. Amino acids. D. Monosaccharides
Answer:
C. Amino acids. D. Monosaccharides
Explanation:
I think this is the answer hope it helps!
When comparing 2 populations of animals, which statement most likely indicates that
they are the same species?
Answer:
they are able to produce fertile offspring
Explanation:
A species is a group of organisms that are able to produce fertile offspring. This criterion is the basis of the biological concept of species proposed by Mayr in 1970, who defined a species as a group of genetically similar interfertile populations which are reproductively isolated from other groups. In consequence, only those populations whose individuals can interbreed (mate) with one another to produce viable and fertile offspring must be considered to be part of the same species.
This diagram illustrates the three types of plant tissue. (attached)
Which main plant tissue is shown in green?
dermal
ground
vascular
meristem
Answer:
Ground tissue
Explanation:
Ground tissue, which is also known as cortex or ground parenchyma, is the main plant tissue shown in green in the image.
what does the term conversion nation mean in regards to energy
Answer:
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Explanation:
When a pollutant is removed from the air by a natural process, it _____.
is gone forever
ends up somewhere else
causes chemical reactions
disrupts natural processes
Answer:
it's ends up somewhere else
Can someone help me with the order of the carbon cycle ?
Answer:
First what is it? Carbon cycle is, nature's way of reusing carbon atoms, which travel from the atmosphere into organisms in the Earth and then back into the atmosphere over and over again. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms.
1.Carbon moves from the atmosphere to plants. In the atmosphere, carbon is attached to oxygen in a gas called carbon dioxide (CO2). Through the process of photosynthesis, carbon dioxide is pulled from the air to produce food made from carbon for plant growth.
2.Carbon moves from plants to animals. Through food chains, the carbon that is in plants moves to the animals that eat them. Animals that eat other animals get the carbon from their food too.
3.Carbon moves from plants and animals to soils. When plants and animals die, their bodies, wood and leaves decays bringing the carbon into the ground. Some is buried and will become fossil fuels in millions and millions of years.
4.Carbon moves from living things to the atmosphere. Each time you exhale, you are releasing carbon dioxide gas (CO2) into the atmosphere. Animals and plants need to get rid of carbon dioxide gas through a process called respiration.
5.Carbon moves from fossil fuels to the atmosphere when fuels are burned. When humans burn fossil fuels to power factories, power plants, cars and trucks, most of the carbon quickly enters the atmosphere as carbon dioxide gas. Each year, five and a half billion tons of carbon is released by burning fossil fuels. Of this massive amount, 3.3 billion tons stays in the atmosphere. Most of the remainder becomes dissolved in seawater.
6.Carbon moves from the atmosphere to the oceans. The oceans, and other bodies of water, absorb some carbon from the atmosphere. The carbon is dissolved into the water.
Explanation: This should help
I mt.Kaboob were to erupt again what changes might you expect to see in the walking bean population
Answer: the. Population of the light red walking beans would grow because the red light from the explosion would help the light red kidney beans blend in.
Please help me with this question. Biodiversity needs to be maintained for the future of the human race.
Do you agree or disagree with the statement? Provide two pieces of evidence to support your position.
Answer:
What is biodiversity?
It is the variety of life on Earth, in all its forms and all its interactions. If that sounds bewilderingly broad, that’s because it is. Biodiversity is the most complex feature of our planet and it is the most vital. “Without biodiversity, there is no future for humanity,” says Prof David Macdonald, at Oxford University.
The term was coined in 1985 – a contraction of “biological diversity” – but the huge global biodiversity losses now becoming apparent represent a crisis equalling – or quite possibly surpassing – climate change.
More formally, biodiversity is comprised of several levels, starting with genes, then individual species, then communities of creatures and finally entire ecosystems, such as forests or coral reefs, where life interplays with the physical environment. These myriad interactions have made Earth habitable for billions of years.
A more philosophical way of viewing biodiversity is this: it represents the knowledge learned by evolving species over millions of years about how to survive through the vastly varying environmental conditions Earth has experienced. Seen like that, experts warn, humanity is currently “burning the library .
Summarize how the loss of energy between each level of an energy pyramid affects an ecosystem
Answer:
Energy decreases as it moves up trophic levels because energy is lost when the organisms from one trophic level are consumed by organisms from the next level
The energy loss between each pyramid is the energy that is lost either in the form of heat, energy consumption or the energy that is consumed by the organisms. Energy loss per tropic level is 10%.
What is a pyramid ?It is defined as the stages that each organism represents as their level for example primary producers are at their first tropic level, consumers at their second and the decomposers at their third level.
The primary level of the pyramid is called as producers where they produce the food that is consumed by the consumers, the energy lost via the heat and the total energy is produced as total in as only 10% energy is transferred from the primary level to the next level.
The energy lost per unit tropic level is consumed as per the timeline and the type decided.
Therefore, it is 10% energy transferred only that is transmitted only rest gets consumed.
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6. Compare the DNA of an offspring to the DNA of its parents.
Answer: In DNA the parent duplicates itself through a process known as mitosis. Any offspring is going to have the same exact DNA as the parent. (same characteristics, everything).
The comparison of the DNA of an offspring to the DNA of its parents is determined by the fact that every offspring gets 50% of its genome from each parent, but it is always a different 50%.
How does the DNA of parents compare to that of offspring?In the process of sexual reproduction, meiosis produces haploid gametes that fuse during fertilization to produce a diploid zygote. In other words, an offspring inherits half of the genetic material from each parent. The children resemble their parents, but they are not identical to them.
During the process of meiosis, gametes get a random chromosome from each pair. This means that there are over 8 million possible DNA combinations from 23 chromosome sets. Due to this, the difference in the genetic material or DNA sequences is occurred due to the process of variations between them while DNA copying.
Therefore, the comparison is made due to the mechanism through which every offspring gets 50% of its genome from each parent, but it is always a different 50%.
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You are trying to purify a protein that is soluble in a solution of 2 M ammonium sulfate. After centrifugation to remove other proteins that have precipitated at this high salt concentration, you recover the supernatant to assay the target protein's activity in a cell culture system.
(a) Explain why the cell dies when incubated with the supernatant.
(b) What procedure could you preform to correct the problem?
Answer:
a) The cell dies because it was in a hypertonic medium, and it loses water due to the difference in pressure and may even die from dehydration.
b) To correct this, the cells can first be placed in an isotonic solution (one that has the same concentration of solute as a solution separated or isolated by a semi-permeable barrier). A method to remove the salt is called dialysis.
Explanation:
A protein purification is a series of processes that allow the isolation of protein from mixture. Thereby this process is vital for the characterization of the function, structure and interactions of the protein of interest. It is therefore a very important procedure to perform correctly.
Ammonium sulfate is a salt whose chemical formula is (NH4)2SO4. The cells are in a 2M solution (2 moles of sulfuric acid per liter of solution). This is detrimental because the solution is hypertonic, it has a higher osmolarity in the external medium than inside the cell, so that a cell in such a solution loses water due to the pressure difference, i.e. osmotic pressure, and may even die from dehydration. The outflow of water from the cell continues until the osmotic pressure of the external medium and the cell are equal.
Centrifugation is a method by which solids can be separated from liquids of different density by means of a rotating force. After centrifugation, the supernatant will have a soluble part (proteins) and a pellet (cells and other insoluble parts). Thereby, the protein of interest would be recovered in the supernatant. But since the cell was not previously in a suitable medium, it could not carry out its metabolism and died and could not produce the protein of interest.
a) The cell dies because it was in a hypertonic medium, and it loses water due to the difference in pressure and may even die from dehydration.
b) To correct this, the cells can first be placed in an isotonic solution (one that has the same concentration of solute as a solution separated or isolated by a semi-permeable barrier). A method to remove the salt is called dialysis.
Dialysis is the process of separating molecules in a solution by the difference in their diffusion rates or osmotic pressure across a semipermeable membrane. A solution of various types of molecules is placed in a semi-permeable dialysis bag, such as, for example, on a cellulose membrane with pores, and the bag is sealed. The sealed bag is placed in a beaker with pure water or another solution. Molecules small enough to pass through the pores (often water, salts and other small molecules) tend to move in or out of the dialysis bag in the direction of the lower concentration. However, larger molecules (such as DNA, proteins or polysaccharides) that are larger than the pore diameter are retained within the dialysis bag.
6) If a parent cell has 26 chromosomes, how many chromosomes does each daughter cell have after mitosis
Answer:
26 chromosomes
Explanation:
Mitosis is the division of somatic cells in which the genetic content or number of chromosomes remain intact in daughter cells.
explain how mutation evolution might
occur in a population
Answer:
mutations create a new particular gene, a new allele. If that allele is passed down to the next offspring and the next, the mutation would be carried throughout the population. Some of the species in the population might not show any symptoms of a mutation or not feel the effects of it, but pass it down. If the mutation is neutral (causing no harm or no good), it may be passed down. If the mutation is beneficial to the species, and helps them survive, it may be passed down more. If the mutation is harmful, the mutation may eventually stop being passed down, and start to only appear if something happens genetically (mutation still may happen, but not because of passing down from parent to offspring).
Explanation:
What is the outer skin called
Answer:
Epidermis
Explanation:
The epidermis is the thin outer layer of the skin.
Answer: The epidermis is the thin outer layer of the skin.
Explanation:
What is the definition of galactic center and galaxy cluster ?
Answer:
The Galactic Center (or Galactic Centre) is the rotational center of the Milky Way galaxy; it is a supermassive black hole of 4.100 ± 0.034 million solar masses, which powers the compact radio source Sagittarius A*.