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Related Questions
In order to determine the rate of photosynthesis (the conversion by plants of carbon dioxide and water into glucose and oxygen), the oxygen gas emitted by an aquatic plant is collected over water at a temperature of 293 K and a total pressure of 754.8 mmHg. Over a specific time-period, a total of 1.31 L of gas is collected. The partial pressure of water at 293 K is 17.55 mmHg. What mass of oxygen gas (in grams) forms
Answers
Answer:
1.6896 grams
Explanation:
Given that:
Total pressure = The pressure of [tex]O_2[/tex] + partial pressure of [tex]H_2O[/tex]
∴
The pressure of [tex]O_2[/tex] = Total pressure - partial pressure of [tex]H_2O[/tex]
= (754.8 - 17.55) mmHg
= 737.25 mmHg
At standard conditions:
1 mmHg = 0.00131579 atm
∴
737.25 mmHg will be: (737.25*0.00131579) atm = 0.970065928 atm
P ≅ 0.97 atm
The temperature (T) = 293 K
Volume (V) = 1.31 L
Using ideal gas equation
PV = nRT
0.97 × 1.31 = n × 0.0821 × 293
[tex]n = \dfrac{0.97 \times 1.31}{0.0821 \times 293}[/tex]
n = 0.0528
mass of oxygen [tex]O_2[/tex] = no. of moles * molar mass
= 0.0528 * 32
= 1.6896 grams
Extracellular signal molecules that are hydrophilic must bind to a cell-surface receptor in order to signal a target cell to change its behavior. These are examples of hydrophilic hormones in animals: A. tyrosine-derived epinephrin and norepinephrin B. insulin and glucagon C. serotonin and melatonin (tryptophan-derived mammalian neurotransmitters D. All of the above E. None of the above
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Answer:
The correct answer is - D. all of the above.
Explanation:
Hydrophilic hormones are the hormones that can not pass through the cell membrane as they are poorly lipid-soluble and cannot pass through cell membranes and bind the receptors present on the surface of the membrane.
Insulin and glucagon are peptide hormones that bind to a receptor in the target cell's membrane surface. Norepinephrine and epinephrine are catecholamines that are hydrophilic in nature. Seratonin and Melatonin are also bound on the surface receptor due to their hydrophilic nature.
Multiple Choice
Which of the following describes the best way that feed can be modified in order to decrease the need
for antibiotics?
A.mix in organ meats from other animals
B.allow the animals to forage some of their own food
C.include roughage and elements of a natural diet
D.add hormones or other additives to the feed
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5. A student examines the winged insect shown below. Order Go 103 Mantodea Raphidioptera Coleoptera Dichotomous Key Sep Characteristics Insect has an extremely long prothorax (neck) Insect has a short or no prothorax Forelegs come together in a "praying" position Forelegs do not come together in a "praying" position Wings are armor-like with mermbranous hind Wings undereath Wings are not armor-like Wings are triangular in shape Wings are not triangular in shape and head is elongated Insed lacks a proboscis (long, slender snout) and has long filaments at abdominal up Insect has a proboscis and lacks long filaments at abdominal tip Go to 4 Go te 5 Mecoptera Ephemeroptera Lepidoptera Based on the dichotomous key, in what order should this insect be classified? A. Mantodea B. Raphidioptera C. Coleoptera D. Lepidoptera
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Answer:
I’m not sure if it’s correct but I thinks it’s A
Explanation:
Looked it up online
Answer:
Its C - Coleoptera
Explanation:
Why can animal waste be toxic?
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Answer:
it toxicates animals when they eat it
Explanation:
Answer:
It can be toxic because it has harmful bacteria and it can cause a lot of health problems. Roundworms, hookworms, and whipworms are commonly known gastrointestinal parasites that shed eggs in dog feces. These eggs can cause problems to us humans and the environment.
Hope this helps! :)
estructura celular por medio de la cual se da a cabo el intercambio de sustancias en las bacterias
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Answer:
uhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhb
Question 7
In prokaryotic cells, the ribosomes:
O A. synthesize proteins
O B. synthesize nucleic acids
O C. synthesize sugars
O D. synthesize fatty acid
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Answer:
[tex]\boxed {\boxed {\sf A. \ Synthesize \ proteins}}[/tex]
Explanation:
The ribosomes are small organelles made of RNA and proteins. Its function is the same in both prokaryotic and eukrayotic cells: protein synthesis.
The process begins in the nucleus. The DNA and genetic information is housed here. Certain sections are transcribed and copied to make messenger mRNAs that can fit through the nucleus and pores to travel out to the ribosomes.
The ribosomes use the mRNA in a process called translation. They match each set of 3 nucleotides (a codon) in the mRNA to 1of 20 different amino acids. A special sequence of amino acids forms, the molecule folds, and a protein is formed.
So, a ribosome is the main site for protein synthesis and the correct choice is A.
The 5 phases of mitosis are: *
interphase, analogyphase, packphase, metaphase, propanephase
interphase, prophase, metaphase, anaphase, telephase
telophase, metaphase, anaphase, prophase, interphase
prophase, interphase, metaphase, telophase, anaphase
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PLS HELP WILL GIVE BRAINLIEST
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I need help with a quiz.
Read each past tense verb form. Then decide if it is regular or irregular.
bought
regular
irregular
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Answer:
it is irregular
Explanation:
hope this helps
Definition: This is an organism that has two identical alleles for the same genetic trait.
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Answer:
the answer to that would be a heterozygous organism.
Explanation:
A scientist has discovered a new plant species in the Amazon rainforest. She tells her fellow scientists that the plant she
has found produces a cone. What might they say about how this plant is different from an angiosperm?
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It's because it does not depend on insect pollination.
need help on this ASAP!!
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Answer:
i think is b or d. maybe is d
4. Which city has a more arid (drier) climate?
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You asked which city has a more arid climate. You haven't given any options for what cities we are to compare.
Which nation did the United States compete with during the Space Race?ChinaJapanthe Soviet Unionthe United KingdomMark this and return
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Answer: Soviet Union
Explanation:
Answer:
I think it's "The Soviet Union"
Which characteristic do both viruses and bacteria have in common?
A. They contain a nucleus and organelles.
B. They make their own food,
C. They require a host cell to reproduce.
D. They contain nucleic acids such as DNA and RNA.
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Answer:
:D
Explanation:
The biceps reflex tests a muscle spindle reflex arc (like the patellar reflex). The biceps brachii is innervated by the musculocutaneous nerve and the triceps brachii is innervated by the radial nerve. When the biceps tendon is tapped with a hammer, action potential generation ___________ in the musculocutaneous nerve and _____________ in the radial nerve.
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Answer:
The biceps reflex tests a muscle spindle reflex arc (like the patellar reflex). The biceps brachii is innervated by the musculocutaneous nerve and the triceps brachii is innervated by the radial nerve. When the biceps tendon is tapped with a hammer, action potential generation increases in the musculocutaneous nerve and decreases in the radial nerve.
Explanation:
The biceps reflex test is performed to evaluate the functionality of the C5 and C6 reflex arcs and is done by quickly depressing the biceps brachii tendon by using a reflex hammer.
When the biceps brachii tendon is stimulated, the normal response would be a reflex contraction of the biceps brachii muscle, producing the flexion of the elbow. The contraction of this muscle is produced thanks to an increase in the action potential generated in the musculocutaneuous nerve -because this is the nerve that innervates this muscle-, which also generates a decrease in the action potentials in the radial nerve -given that this nerve innervates the antagonist muscle of the biceps brachii, the triceps brachii-.
Part E
Which of the following variables did Pasteur change in his experiment to test the hypothesis of
spontaneous generation?
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The variables that Pasteur changed in his experiment to test the hypothesis of spontaneous generation is the shape of the flask
Pasteur in 1856 was known for his contribution to the science world through the study of the causes of spoilage in beer and wine. He demonstrated his knowledge from his discovery of the properties of fermentation by microorganisms.
He demonstrated and discovered that airborne microbes were the cause of food spoilage not a spontaneous generation with his swan-neck flask experiment. He went ahead with a suggestion that if microbes were responsible for food spoilage and fermentation, they could also be responsible for causing infection and this was the foundation for the germ theory of diseases.
In the later year, Pasteur established his previous experiment with a new one. In this new experiment, he made several flasks with long, twisted necks called the swan-neck flasks where he boiled broth and sterilized it. The essence of the swan neck design is to inhibit the introduction of airborne microorganisms into the flask by trapping them between the twists and bends of the flask and also to allow the exchange of air in the flask with the surrounding air.
Based on the theory above, we can conclude that the variables that Pasteur changed in his experiment to test the hypothesis of spontaneous generation is the shape of the flask
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In order for a trait to be considered a competitive advantage, the trait must be?
A. Allow the individual to utilize fewer food and water resources to survive.
B. Allow the individual to be stronger and outcompete others
C. Allow the individual to survive better and reproduce more in the environment
D. Allow the individual to have fewer diseases and not get sick
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Answer:
1. Allow the individual to survive better and reproduce...
2. Hooves are better equipped for environments with plains.
3. An insect species with high reproduction rates and a significant...
4. Genetic variation
5. Higher reproduction rates
Explanation:
Good luck ♡
In order for a trait to be considered a competitive advantage, the trait must allow the individual to survive better and reproduce more in the environment. So, the correct option is C.
What do you mean by Trait?
A trait may be defined as the appearance or a manifestation of characters. It is also known as Phenotypes.
To understand better about competitive advantage, an individual must carry the trait of relative fitness which defines the relative survival and relative reproduction of an individual.
Therefore, in order for a trait to be considered a competitive advantage, the trait must allow the individual to survive better and reproduce more in the environment.
To learn more about Competitive advantage, refer to the link:
https://brainly.com/question/23425661
based on the data shown in the weather map, a cold front is most likely about to pass through which state
A. Oklahoma (OK)
B. Wyoming (WY)
C. Louisiana (LA)
D. New York (NY)
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Answer:
Louisiana
Explanation:
I got the answer wrong and this was the correct answer
Auroras occur in the
a. troposphere
b. stratosphere
c. mesosphere
d. thermosphere
Please select the best answer from the choices provided
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C
because they happen in the north or south pole
Answer:
c. mesosphere
Explanation:
What is the answer to question 1
Answers
Answer:
TTT GCC AGT
Explanation:
Arachidonic acid (ARA) and docosahexaenoic acid (DHA) are two long-chain fatty acids necessary for the development of Multiple Choice the nervous system, brain, and eyes. the endocrine and integumentary systems. the circulatory and respiratory systems. the muscles and bones.
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Answer:
The correct answer is: the nervous system, brain, and eyes.
Explanation:
Arachidonic acid (ARA) and docosahexaenoic acid (DHA) are long-chain polyunsaturated fatty acids that have great nutritional value, as they are omega-6 and omega-3 fatty acids, respectively, meaning they are essential fats that cannot be produced by the body and, therefore, need to be part of the diet.
The consumption of ARA and DHA has been directly linked to the development of the brain and the retina, and the inclusion of these fatty acids in the nutrition of infants has been proven to be extremely beneficial to their growth.
Besides their functions in the development of the nervous system and the eyes, ARA and DHA play a role in maintaining a healthy immune system and preventing cardiovascular conditions.
Arachidonic acid (ARA) and docosahexaenoic acid (DHA) are two long-chain fatty acids necessary for the development of the nervous system, brain, and eyes.
Arachidonic acid (ARA) and docosahexaenoic acid (DHA) represent two long-chain polyunsaturated fatty acids.In mammals, these polyunsaturated fatty acids (ARA and DHA) are fundamental during the development of the nervous system, and they are found in milk.It is for that reason that in some countries DHA and ARA nutrients are added to the milk formulas used to feed babies.In conclusion, arachidonic acid (ARA) and docosahexaenoic acid (DHA) are two long-chain fatty acids necessary for the development of the nervous system, brain, and eyes.
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The following substrate is completely oxidized to CO2 by a cellular homogenate containing all necessary enzymes and coenzymes . It is assumed that the glycolysis, the citric acid cycle and oxidative phosphorylation are fully active and that the glycerol-3-phosphate shuttle is functional. What is the net gain of ATP molecules after the complete degradation of one Glyceraldehyde 3-phosphate molecule
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Answer:
The correct answer is - 19 ATP.
Explanation:
One molecule of dihydroxyacetone phosphate fully oxidizes and generate 19 molecules of ATP by the following stochiometry
Direct ATP- 2
ATP from NADH ( 5X3)= 15
ATP from GTP 1
ATP from FADH2 1 or 1.5
Total 19 or 19.5
list two ways that the fungal life cycle is different from the animal life cycle
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Answer:
In some aspects, the fungal life cycle is contrary to vertebrates. In most fungi, hyphae with haploid nuclei are the dominant stages. Two nuclei from neighboring hyphae merge into a diploid zygote during sexual reproduction. The zygote undergoes meiosis after a brief period of time.
Explanation:
The haploid (called spores) cells produced from this process become new haploid hyphae. In the bread mold, the haploid hyphae form many haploid springs which can go to other places and lead to new hyphae. Most fungi can also reproduce asexually. Note that mitosis (why?) causes these spores. This asexual reproductive process is a distinct cycle and is more widespread in most fungi than the sexual life cycle. The characteristic black dots found on molten bread, for example, are clusters of asexually produced spores. See this animation which describes the bread mold life cycle.
Unique and complex fungal life cycles. Fungi breed sexually either cross-fertilization or self-fertilization. The Haploid fungus has gametes at tips and generates hyphae. There are two different types of matches (marked as "+ type" and "– type").
Bengal Tigers (Panthera tigris tigris) have coat colors that are either golden (the dominant trait) or white. In examining a population of Bengal Tigers found in India, researchers found that the white tiger frequency was 4%. If this population had 200 tigers with 10 heterozygotes, calculate the actual genotype frequency of the heterozygotes in the tiger population.
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Answer:
5%
Explanation:
Frequency of white tigers = 4%
population of tigers = 200
number of heterozygotes = 10
Determine the actual genotype frequency of Heterozygotes
frequency of heterozygotes = Number of heterozygotes / population
= ( 10 / 200 ) * 100
= 0.05 * 100 = 5%
Question 6 (1 point)
What is a Eukaryotic cell?
A cell with DNA that is not contained within a nucleus
A cell with DNA contained in a nucleus
A single celled organism
A cell that produces its own food through photosynthesis
ос
Od
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Lexi's teacher gave each person in the class several cotton swabs to test for bacteria on surfaces of various objects. Lexi tested many objects like the pencil sharpener, the dry-erase board, the doorknob, and the overhead projector. She found that the doorknob on the outside of her classroom had more bacteria than any other tested object. Which of the following questions would best help Lexi find out more information about the doorknob's bacteria? A. What color is the doorknob? B. What are the sources of the bacteria? C. Is the doorknob bigger than the other objects? D. What does the doorknob look like?
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Answer: what are the sources of the bacteria?
Explanation:
define what an intron and exon is
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What do you see happening in the graph 65 million years ago?
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Answer: The dinosaurs go extinct.
Explanation: It literally says right there