The incorrect theory of alchemy, which aimed to transmute base metals into noble metals like gold and achieve immortality, led scientists to discover several important aspects of chemistry.
Alchemists' experiments advanced chemistry, even though they never fulfilled their aims. They perfected distillation, filtration, and crystallisation, which are still used today.
Alchemists studied the characteristics and interactions of many substances, establishing the framework for chemical elements, compounds, and reactions. Alchemy accidentally advanced chemical understanding and experimental methods.
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Plant pollen is often carried by wind or insects from one plant to another. This process deposits the pollen containing the male sex cell on the part of the plant that contains the female sex cell.
What does this show about these plants?
They are sexual.
They are unicellular.
They are prokaryotic.
They are nonvascular.
Answer:
They are sexual
Explanation:
This is sexual because you need a mother cell and a father cell for this to happen.
Answer:
they are sexual because it takes to plants to create another one
Explanation:
What characteristics make dna a polymer ?
Do alligators have complete 360 vision?
Answer:
yes
Explanation:
One of the first astronomers to use a telescope was Galileo. Using his telescope he discovered that Jupiter had four moons and each night, the four moons, seen as points of light, appeared to change positions slightly. This observation gave further evidence for what? All BUT ONE could apply.
Answer:
B. The planets vary in size and composition.
Explanation:
Galileo was an Italian scientist and he was the first person to use a telescope in the field of astronomy. Although, the first telescope was invented by Sir Isaac Newton.
A telescope can be defined as an optical instrument or device which comprises of a curved mirror and lenses used for viewing distant objects i.e objects that are very far away such as stars and other planetary bodies.
One of the first astronomers to use a telescope was Galileo. Using his telescope he discovered that Jupiter had four moons and each night, the four moons, seen as points of light, appeared to change positions slightly. Therefore, this observation gave further evidence that the planets vary in size and composition. The slight change in the position of the moon indicate that planetary bodies have a variation in size and matter (constituent elements) that make them up.
Answer:
b
Explanation:
Select the correct answer.
Ships accidentally spread a species of sea urchins to an area of the sea in which they previously didn’t live. The graph depicts the growth trend of native seaweed, a common food for sea urchins, after this invasion. What could ecologists do to curb the trend in the seaweed population?
A.
Eliminate the sea urchins’ competitor.
B.
Introduce more sea urchins.
C.
Introduce a competitor for seaweed.
D.
Introduce a predator for invasive sea urchins.
Answer:
D!
Explanation:
Introducing a predator to kill the sea urchins will lower their population and/or make them move away from the area they invaded
"A cell with 26 chromosomes undergoing meiosis will have 4 daughter cells with 26 chromosomes each by the end of meiosis II. " why is this INCORRECT?
Answer:
the number of chromosomes each time gets halved
so the first division will have 13 in each daughter cell
and the second will have about 3 in each daughter cell
Explanation:
Mendel's primary contribution to our understanding of inheritance was
al The idea that genes are found on chromosomes
b) Explanation of the patterns of inheritance
c) The discovery of alleles
d) Determining that informations contained in DNA are for protein synthesis
Answer:
D.) (Determining that informations contained in DNA are for protein synthesis)
Two Scientists are discussing which two organisms are more closely related to each other. Scientist 1 proposes that the cow and dolphin are more closely related. Scientists 2 says that the frog and turtle are because they are both reptiles.
According to the chart above, which scientist is most likely correct?
Question 1 options:
Scientist 1 because the cow and dolphin share a more recent common ancestor
Scientists 2 because the frog and turtle share common food sources
Scientist 2 because shared characteristics are most important in determining relationships
Scientist 1 because the cow and dolphin both have live births
Answer:
cow and dolphin. D.
Explanation:
Pleaseeeee help me ASAP
Answer:
11. B. 25%
12. C. Short AND E. Pink
Hope this helps!!
- Kay :)
why is vachellia nilotica classified as family level
Answer:
Vachellia nilotica is a flowering plant tree in the family Fabaceae.
Explanation:
For aerobic respiration, a variety of substances must be in a state of influx across the inner membrane. Assuming a brain cell in which glucose is the sole energy source, indicate for each of the following substances whether you would expect a net flux across the membrane and if so, how many molecules will move in which direction per molecule of glucose catabolized.
- electrons
-pyruvate
-oxygen
-ATP
-ADP
-Acetyl CoA
-Glyceral-3-phosphate
-NADH
-FADH2
-Oxaloacetate
-Water
-Protons
Answer:
electrons inflow
pyurvate inflow
oxygen inflow
ATP Outflow
ADP Inflow
Acetyl CoA no net change
Gluceral-3-phosphate no net flow
NADF inflow
FADH2 outflow
Oxaloacetate no net flow
water outflow
proton outflow
Explanation:
Aerobic respiration is the process in which cell get oxygen from within. There is no inflow of oxygen and the movement is minimum. The membrane covering the cell releases the excess oxygen if the initial storage is more than the requirement. This is in the form of outflow in ATP.
Two genes control color in corn snakes as follows: O- B- snakes are brown, O- bb are orange, oo B- are black, and oo bb are albino. An orange snake was mated to a black snake, and a large number of F1progeny were obtained, all of which were brown. When the F1 snakes were mated to one another, they produced 100 brown offspring, 25 orange, 22 black, and 13 albino.a. What are the genotypes of the F1 snakes
Answer:
The correct answer is - OoBb
Explanation:
As it is given that:
O- B- snakes = brown
O- bb = orange
oo B = black
oo bb = albino
And here, the cross between an orange snake and black snake which means:
P0 : ooBB × OObb
offspring of f1 would be =
F1 : OoBb
self cross of f1 offsprings
F2 : OoBb × OoBb
Gametes OB Ob oB ob
OB OOBB OOBb OoBB OoBb
Ob OOBb OObb OoBb Oobb
oB OoBB OoBb ooBB ooBb
ob OoBb Oobb ooBb oobb
here we get approximately similar as Phenotypic ratio as mention in question- 9 : 3 : 3 : 1 or 100:25:22:13
Thus, the correct answer would be: OoBb
I NEED HELP ON THIS QUESTION ^^^^!
Answer:
The answer is refraction.
Explanation:
Absorption is when no light is reflected back, diffraction is where light bends around a corner, reflection is like taking and shining a flashlight against a mirror, and refraction is like when you put a straw in water and it looks like the straw is not straight.
Answer:
D reflection nga
wala na bang ibang tanong HAHAHHA
What are some of the challenges one encounters in marketing orchard products?
Explanation:
One of the challenges may occur is achieving cleanliness, neatness, and order because orchard may be dirty at some point give its assosciation with actual dirt and moist.
the marine animals affected by the bloom do not eat algae. How could domoic acid have poisoned these organism?
Answer:
Domoic acid is a kainic acid-type neurotoxin that causes amnesic shellfish poisoning. It is produced by algae and accumulates in shellfish, sardines, and anchovies. When sea lions, otters, cetaceans, humans, and other predators eat contaminated animals, poisoning may result.
Explanation:
Blooms of algae affect ALL TROPHIC levels because domoic acid is a neurotoxin that accumulates in different species (e.g., shellfish, sardines, anchovies, etc) which are eaten by higher consumers (e.g., manatees and dolphins), thereby altering the equilibrium of the food chain.
A food chain refers to the transfer of matter and energy as food from different trophic levels in an ecosystem.
The food chain is sustained by organisms called producers (.e.g., algae in a marine ecosystem), which are found at the most basal level of the chain.
The primary consumers (e.g., marine invertebrates) are organisms localized at the second trophic level. These organisms (primary consumers) eat producers.
The secondary consumers are organisms found at the third trophic level, which eat primary consumers, and so successively to all major trophic groups.
Blooms of algae alter the whole food chain because domoic acid is a poison that accumulates in the body of the organisms at all trophic levels.
In consequence, marine consumers at higher trophic levels (e.g., manatees and dolphins) are also affected by blooms of algae.
In conclusion, blooms of algae affect ALL TROPHIC levels because domoic acid is a neurotoxin that accumulates in different species (e.g., shellfish, sardines, anchovies, etc) which are eaten by higher consumers (e.g., manatees and dolphins), thereby altering the equilibrium of the food chain.
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i just started this survey i got to number 5 and i have no idea how to do it.
What makes finches in the Galápagos Islands a good example of speciation?
A. It is very easy to train a Galápagos finch to eat seeds instead of
insects.
B. Galapagos finches have different beak adaptations.
C. Galapagos finches teach each other new adaptations.
O
D. There is only one species of Galapagos finch.
SUBMIT
Hi
Answer:
The Answer is B. Galapagos finches have different beak adaptations.
Explanation:
Answer:
B
Explanation:
what is NOT an example of proof of the existence of the emdosymbiotic theory in modern day mitochondria?
a. Mitochondria has its own DNA
b. Mitochondria have their own nucleus
c. Mitochondria has it's own membrane
d. Mitochondria has its own ribosomes
Answer:
The correct answer is - option B. mitochondria have their own nucleus.
Explanation:
Endosymbiotic theory is a evolutionary theory which explains how eukaryotic cells evolved from prokaryotic organisms.
Evidences of endosymbiotic theory are:
1. Mitochondria and chloroplasts are double membrane bound cell organelles. The inner membrane probably evolved from the plasma membrane of engulfed bacterium and outer membrane from the plasma membrane or endoplasmic reticulum of the host cell.
2. Almost similar size of mitochondria and chloroplast and bacteria and their ribosomes.
3. Cristae of mitochondria resemble the folded membranes is groups of bacteria.
4. Mitochondrion and chloroplast both have circular DNA similar to those of bacterial DNA.
2. Consider a well-trained 130-pound female marathon runner, Jordan. Jordan has just loaded up on a carbohydrate meal and has the maximum amount of stored glycogen (6.8 grams of glycogen per pound of body weight). (10pts)
a. How many grams of glycogen is Jordan storing in her body? Show your calculations.
b. How many Calories does she have stored as glycogen?
c. If this same number of Calories were stored as fat, how much would it weigh?
d. Given your answers to a. and c., why do you think your body stores most of its extra energy as fat rather than glycogen?
e. Jordan will be competing in a marathon (26.2 miles). Given her above glycogen stores and the rate at which she consumes them running at marathon pace, she only has enough glycogen to last for 24 miles. What must she do in order to be able to run at the same pace beyond this?
Considering a well-trained 130-pound female marathon runner named Jordan.
The grams of glycogen Jordan is storing in her body is 884 grams.
Given that:
weight of the female marathon runner = 130 poundsmass of the glycogen = 6.8 grams / pounda.
The total mass of glycogen that Jordan is storing in the body of 130 pounds is:
= 130 pounds × 6.8 grams/pound= 884 gramsb. The amount of Calories she has stored in the body of 130 pounds is calculated as follows.
Since 1 gram is equivalent to 7.716179 kcal
∴
884 grams will be = (884 grams × 7.716179 kcal)/ 1 gram= 6821.102 kcal.c.
Fat is a class of food that the when consumed provides energy to the body. It is usually stored as fatty acid and is measured in pounds.
One pound of fat usually requires an energy of about 3500 calories to burn.
Since 1 pound of fat requires 3500 calories;The weight of the glycogen in fat will be:
= (6821.102 kcal × 1 pound of fat)/3500 kcal= 1.949 pounds of fatd.
The body stores most of its extra energy as fat rather than glycogen because the body after 8 hours of eating, body starvation starts to occur. At this stage, the stored fat is designated to supply energy to the body.
e.
Given that:
Jordan will be competing in a marathon of = 26.2 milesFrom her condition, she has enough glycogen to last for 24 miles.In order for her to be able to run at the same pace beyond the 24 miles, she needs to consume fatty food substances that can help her store additional fat that can be used to provide energy during the marathon race.
Therefore, we can conclude that we have understood the grams of glycogen that Jordan can store in her body, the conversion from grams to calories, and how Jordan can achieve the marathon of 26.2 miles.
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Give two specific examples where asexual reproduction happens in nature.
Answer: Bacteria produce asexually, making copies of itself to spread. Plants also produce asexually, this happens in several ways one way s binary fission. This is asexual reproduction by a separation of the body into two new bodies. Simply copies of the original.
Explanation:
Which of the following is a trace fossil? *
a mark left by a dinosaur's tail
a mosquito trapped in amber
a mummified plant seed
O a frozen woolly mammoth
which
Answer:
A. A mark left by a dinosaur's tail.
Explanation:
A trace fossil is the mark or imprint of an animal's body or something it did or left behind, rather than the physical animal itself.
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I NEED HELP ASSAP
how can you tell whether two magnets will attract eachother, repel eachother, or both
plz explain in a few sentences
Answer:
Explanation:
there is a positive side and a negitive side to magnets two of the same side of the magnet will repel oppisites will attract
positive+positive=repel
positive+negitive=atract
Answer:
attract: when two magnets will attract, S and N will be facing each other
repel: when two magnets will repel, S and S or N and N will face each other
both: when two magnets will attract and repel, the magnets won't be placed in the same way. N will be facing the middle of both S and N or S will be facing the middle of N and S
Explanation:
this is what i learned i hope it's right if not i didn't say nothing
Why are enzymes described as being like a lock and key?
Answer:
enzymes are compared to a lock and key as they can activate a chemical process or put that same process into a stop
Explanation:
The forehead is _______ to the ears.
Multiple Choice
medial
lateral
inferior
lateral
distal
Answer:
Hey!
Your answer should be LATERAL!
Explanation:
Hope This Helped!
(lemme know if its wrong!)
How do we use the Earth’s heat by capturing geothermal energy?
Answer:People can capture geothermal energy through: Geothermal power plants, which use heat from deep inside the Earth to generate steam to make electricity. Geothermal heat pumps, which tap into heat close to the Earth's surface to heat water or provide heat for buildings. Dose this help?
Explanation:
which of the following is not a condition that must be made for hardy-weinberg equilibrium 1.no mutation 2.no migration 3.domunant alleles nore frequent than recessive allels 4.large population 5. no natural selection guy please answer this one
Answer:
3.dominant alleles more frequent than recessive alleles
Explanation:
To achieve hard-Weinberg equilibrium, certain conditions must be made.
These conditions are:
1. There is noo mutation,
2. Existence of random mating,
3. There should be no natural selection
4. There is the infinite population size
5. No migration
Hence, in this case, the correct answer is option 3, which is not a condition to be made for Hard-Weinberg equilibrium
Low-carbohydrate diets became popular in the late 1990s and were quickly proclaimed to be a fast and easy method of weight loss. The effectiveness and safety of these diets are dependent on the activity and overall health of the individual as well as the total nutritional content of the diet. However, it is true that in some cases, these diets have been effective. What metabolic effects caused by eating a low-carbohydrate diet can be linked directly to a decrease in fatty acid synthesis and an increase in fatty acid oxidation?
a. release of insulin from pancreatic's cells
b. dephosphorylation of AMPK
c. release of glucagon from pancreatic's cells
d. phosphorylation of AMPK
Answer:
c. release of glucagon from pancreatic's cells
d. phosphorylation of AMPK
Explanation:
Low-carbohydrate diets (LCDs) stimulate the secretion of glucagon by a decrease in the blood glucose concentration. Glucagon is a key hormone secreted by pancreatic cells in the same way as insulin but in an opposite way. This hormone (glucagon) prevents glucose accumulation as hepatic glycogen, while insulin helps to the accumulation of glucose in the liver as glycogen, thereby acting to reduce hepatic glucose output. Moreover, the AMP-activated protein kinase (AMPK) is a kinase protein that mediates the phosphorylation and inhibition of acetyl-CoA carboxylase (ACC) in order to reduce the synthesis of malonyl-CoA, a key molecule that regulates myocardial fatty acid oxidation.
Which of the following would NOT be considered an agricultural pest?
an insect chewing holes in leaves
a dog lying among the crops
a rabbit eating growing vegetables
a mole digging tunnels beneath the crops
Answer:
A dog lying among crop
Explanation:
A insect, and mole are considered pest. And a rabbit eating growing vegetables, well if the rabbit eats the growing vegetables then there not growing.
Answer: The correct answer is a dog lying among the crops
Explanation: This answer has been confirmed correct.
A dog is a pet and is not causing damage to the crops. The other three options are all harming the plants (chewing, eating, and digging tunnels).
Which mutation(s) cause the product to be a non-functional protein?
a.Nonsense and Missense c.ilent and Nonsense b. Frameshift and Missense
d. Nonsense and Frameshift
Answer:
The correct answer is - option D. nonsense and frameshift.
Explanation:
If there is a change in the sequence of DNA resulting in premature stop codon mRNA during transcription is known as a nonsense mutation and result in a non-functional protein.
a frame-shift mutation takes place when at least two nucleotides are altered and there are less chances to be changed by two others coding for the same nucleotide. It leads to a non-functional protein.
Compared to small cells, large cells have more trouble doing what
Answer:
As the cell grows, it faces some issues such as:
• Running out of the nutrients and requirement of growth factors.
• Running out of the space.
• Require appropriate gas exchange.
As compared to the smaller cells, larger cells have more issues in moving the required materials inside and excretory products outside. This is because the ratio of the surface is to volume is turning more and more unbalanced and takes much longer time for the cellular processes to take place.
Explanation: