Answer:
The answer is A.
Explanation:
I have no explanation for this but I know for a fact that it's A.
as of may 2020, carbon dioxide levels have reached 417 parts per million. what level should they be at to have the world in a climate similar to that in which civilization first developed?
Given what we know about global carbon levels in the present and the past, we can confirm that in order to be at the level of early civilizations, the modern-day carbon level should be at 280 parts per million.
Global atmospheric carbon levels are measured in parts per million. What this means is that for every one million units of mass in the atmosphere, 280 of them were carbon. This means that in recent years, the global carbon levels in the atmosphere have doubled.
The primary cause of these increased carbon levels is industrial pollution. Chemicals are released into the atmosphere as a by-product of industrial processess. This began with a noticeable spike during the industrial revolution and has then increased without end.
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how is the structure of a leaf optimized for photosynthesis
Answer:
- The upper epidermis of the leaf is transparent, allowing light to enter
- They have a large surface area to volume ratio, allowing more light to enter
The upper epidermis of the leaf is transparent, allowing light to enter and they have a large surface area to volume ratio, allowing more light to enter.
What is responsible for photosynthesis to occur?The mesophyll cell is responsible for photosynthesis occurs. The majority of the chloroplasts and the primary site of photosynthesis are located in the palisade layer. The area of storage and gas exchange is the airy, spongy layer. The stomata control the water and carbon dioxide equilibrium.
For gaseous exchange and photosynthesis, leaves are suited. Since they have a wide surface area and stomata, which enable carbon dioxide to enter the leaf and oxygen to exit, they are well-equipped for photosynthesis.
Chloroplasts, which is known as the house the chlorophyll in plants, are where photosynthesis occurs. The thylakoid membrane, a third inner membrane that creates lengthy folds inside the chloroplast and is bordered by a double membrane, is present inside chloroplasts.
Therefore, The upper epidermis of the leaf is transparent, allowing light to enter and they have a large surface area to volume ratio, allowing more light to enter.
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Gregor Mendel’s research formed the basis of the field of
genetics.
dominance.
recessiveness.
selective breeding.
Answer:
The answer is genetics
Explanation:
I chose this and got it right
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which pathways compose the autonomic nervous system
Answer:
sympathetic division and the parasympathetic division.
Explanation:
The two divisions of the autonomic nervous system are the sympathetic division and the parasympathetic division.
Fucus shows ______life cycle pattern
a)Haplontic
b)Haplo-diplontic
c)Diplontic
d)Diplo-haplontic
Fucus shows the diplontic life-cylic.
Both the male and female fuse in the ostiole of the bump.
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what was the first genetically modified food approved for sale in the us
Answer:
Flavr Savr™ Tomato
Explanation:
One variable not mentioned in the description of the experiment that could affect the results of the investigation is reduced canopy cover. Describe the effect that canopy cover would likely have on the results of the investigation.
The canopy cover can affect the results of an investigation because a higher canopy cover is accompanied by a decrease in the availability of sunlight.
The canopy cover is the proportion of the ground covered by vegetation when it is viewed from vertically above the planted area.
The level of canopy cover affects light availability on the ground and also its microclimate, thereby this feature can also alter any biological experimental procedure by affecting the level and type of biodiversity.
A reduced canopy cover may alter any experimental outcome by increasing the energy/light input in the ground cover stratum, thereby likely affecting biodiversity.
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what is the most common type of laboratory assay that is widely used to assess thyroid hormone concentration
which statement is a feature of both prokaryotic and eukaryotic genes?
Answer:
DNA‑binding proteins influence the ability of RNA polymerase to initiate transcription of a gene
Explanation:
any form of water that falls from clouds is called
Answer: Precipitation
Explanation:
Based on cell theory, which of these answer choices would describe one reason a virus is considered nonliving?
Answer: Viruses are complicated assemblies of molecules, including proteins, nucleic acids, lipids, and carbohydrates, but on their own they can do nothing until they enter a living cell. Without cells, viruses would not be able to multiply. Therefore, viruses are not living things.
Unranus gas a giant, storm that rotates similar to a hurricane?
True
False
Answer:
True
Explanation:
PLEASE HELP ME IM TIMED!
Answer:
All living things are composed of single cells or multiple cells
Explanation:
The cell theory states that all biological organisms are composed of cells; cells are the unit of life and all life come from preexisting life. The cell theory is so established today that it forms one of the unifying principles of biology.
please help I'm stuck!!!
Answer:
b is the answer predator
Identify the type of blood vessel shown below. How does its structure match its function?
Answer:
Can you also send the diagram
X-Ray are and example of electromagnetic radiation?
True or false
Answer:
True
Explanation:
Answer: true
Explanation:
Select the correct pair of classes that are categorized under superclass Pisces.
a) Cyclostomata and Osteichthyes
b) Osteichthyes and Chondrichthyes
c) Agnatha and Gnathostomata
d) Cyclostomata and Chondrichthyes
Answer:
d
Explanation:
because it is the answer
how is the malphigan body adapted for it's function
which mechanism of action is being described when an antibiotic drug causes the destruction of bacterial cell walls
The mechanism of action described when an antibiotic drug causes the destruction of bacterial cell walls is NONSELECTIVE INTERACTION. These drugs do not interact with specific molecules.
Nonselective drugs are involved in nonselective interactions, i.e., they act on a variety of receptors and/or enzymes.
Nonselective drugs can target different cellular structures (e.g., bacterial cell walls) and/or metabolic processes.
For example, Phenocybenzamine is a nonselective drug that can affect different receptors, which is used for the treatment of high blood pressure and sweating associated with pheochromocytoma.
Conversely, enzymes are biological catalysts that speed up chemical reactions by selectively interacting with specific ligands (i.e., substrates).
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after light excites electrons and they leave photosystem ii to travel down the first electron transport chain. how are these electrons replaced to photosytem ii
Answer:
They are replaced by water splitting
Explanation:
Drug Y inhibits the activity of parasympathetic information. Which cranial nerve would possibly be affected
Black fur(B) in guinea pigs is dominant over white fur(b). Find the probability of a white offspring in a cross: Bb x bb.
Answer:
50%
Explanation:
the probability of white offspring is fifty percent
Describe how the diaphragm and the rib cage and lungs move during inhalation and
exhalation.
this is science pls help
Answer:
During inhalation, the diaphragm contracts and pulls downwards, the ribcage expands, allowing oxygen to be sucked in through negative pressure, which causes the lungs to inflate.
During exhalation, the diaphragm and ribcage relax, returning to their normal positions, allowing the oxygen out of the body, thus deflating the lungs.
the baltimore system classifies viruses based predominantly on
Answer:
Baltimore classification is a system used to classify viruses based on their manner of messenger RNA (mRNA) synthesis. By organizing viruses based on their manner of mRNA production, it is possible to study viruses that behave similarly as a distinct group.
Which term refers to the pyramidal cells of the precentral gyrus whose fibers end in the nuclei of the brainstem
Compare and contrast between transportation in human ànd plants.
Why transport in human is more effective than that in plants
Answer:
1)•Plants do not have a circulatory system.
•Humans have a well defined circulatory system.
2)•transportation in plants occurs through specialised tissue xylem and phloem.
•Transportation in humans occurs through a netwotk of blood vessels such as artery vein capillary.
3)In plants substances transported are water, minerals, sugars and amino acid.
•In humans substances transported are glucose, glycerol, minerals, vitamins, fatty acids, amino acids and hormones.
4)Transportation in plants in controlled by opening and closing of stomata.
•Transportation in humans is controlled by constriction or dilation of blood bessels.
-->■Transportation in humans is more effective than the plants because in humans there is a well defined circulatory system which is highly regulated.As transport occur through blood vessel , transportation can be regulated by dilation or constriction of blood vessel.But plant do not have such circulatory system.
BRAINLIST PLS
Adaptational characteristics of himalayan animals
Answer:
Thick layer of body fat or bubbler, to reduce body heat loss. Strong hooves for walking on rock slopes. Thick fur on paws for protection from cold while walking on snow.
Explanation:
1) Thick layer of body fat or bubbler, to reduce body heat loss.
2) Strong hooves for walking on rock slopes.
3) Thick fur on paws for protection from cold while walking on snow.
PLEASE HELP ME IM TIMED!
Answer:
Lipids
Explanation: I take 9th grade biology
what basic unit of heredity is found in segments of dna
Answer:
Genes
Explanation:
Genes are found in DNA and are the basic unit of heredity.
what’s the acceleration of an object with 1 kg and 1 N?
Answer:
What is the acceleration on an object with a mass of 1 kg if a force of 1 Newton is acting on it? 1 Newton = 1 kg • m/s2 One Newton is defined as the amount of force required to give a 1-kg mass an acceleration of 1 m/s/s.17