Answer:
Sound travels better through solids than through air.
Explanation:
Think about being in the pool: you can hear a lot of things, albeit muffled a little. Or think about tapping a really long pole, and someone standing far away can hear the vibration or the noise while touching the pole.
Solids are more tightly packed together. Sound needs a medium to travel though, and anything with densely packed atoms is better than loosely packed. The hierarchy is solid > liquid > air. Kinda funny that we do most of our talking through air.
The size of the iris and pupil can change size. If you walked from a bright room into a dark room, what would happen to the size of the iris and pupil?
Group of answer choices
the iris and pupil would not change size
the iris would get smaller, the pupil would get bigger.
the iris would get smaller, the pupil would get smaller
the iris would get bigger, the pupil would get smaller
the iris would get bigger, the pupil would get bigger
The correct answer is B. The iris would get smaller, the pupil would get bigger.
Explanation
The iris is the name by which the colored part of the eye is known, it is located between the cornea and the lens. In the central part of the iris, there is a round opening known as the pupil. The relationship between these two parts of the eye is very important to sight because between them they control the amount of light that enters the eye. This occurs when the eye is exposed to a high amount of light, the iris muscles make the pupil smaller and the iris larger, limiting light entry into the eye. When the eye is exposed to low amounts of light or darkness, the iris becomes smaller and the pupil enlarges, allowing more light to enter. According to the above, the correct answer is B. the iris would get smaller, the pupil would get bigger. Because it describes the behavior of the iris and the pupil when going from a bright room to a dark room.
The pyruvate dehydrogenase complex is subject to allosteric control, especially inhibition by reaction products. The main regulatory process controlling pyruvate dehydrogenase's activity in eukaryotes is:
a. Exchange of ADP and ATP on the pyruvate dehydrogenase complex.
b. AMP binding to and activating the enzyme.
c. Phosphorylation by ATP, which turns the complex on, and dephosphorylation, which turns the complex off.
d. Phosphorylation by ATP, which turns the complex off, and dephosphorylation, which turns the complex on.
Answer:
d. Phosphorylation by ATP, which turns the complex off, and dephosphorylation, which turns the complex on
Explanation:
Pyruvate dehydrogenase complex (PDC) is a complex enzymes which is responsible for the conversion of pyruvate into acetyl-CoA, NADH and CO2 through oxidative decarboxylation.
Pyruvate dehydrogenase is one of the main component of PDC that catalyze conversion of pyruvate to acetyl-CoA. Pyruvate dehydrogenase (PDH) enzymes is first modified by covalent modification in the pyruvate dehydrogenase complex. Pyruvate dehydrogenase kinase undergo phosphorylation with ATP and inactivates PDH which turns the complex off. then the pyruvate dehydrogenase phosphatase support dephophorylation which turns the complex ON.
Hence, the correct option is d.
According to Kepler’s first law, what is the shape of a planet’s orbit around the Sun?
A.
circular
B.
polygonal
C.
elliptical
D.
random
Answer:
elliptical
Explanation: its almost an oval shape. idk why
Answer:
C
Explanation:
why is the moon white
Moonlight is no longer thought of as the cause. In the 16th century, moonmilk, a soft white limestone precipitate found in caves, was thought to be caused by the rays of the Moon.
Answer:
The moon is not actually white, it's grey.
Explanation:
What I learned is that what makes it white is the reflection of the sun and the sun makes it glow, that's why it looks white.
And if you focus on the moon when it's not full you'll see the other part of it showing but it looks grey not white, because as I told you it's the suns reflection.
Hope I helped!
Have a good day. =)
Which of the following relationships may present harm to one of the organisms involved?
I. Commensalism
II. Parasitism
III. Predation
IV. Mutualism
(A) I and II only
(B) I and IV only
(C) II and III only
(D) III and IV only
Answer:
C
Explanation:
Predator-Prey relationship
What climate conditions occur during La Niña?
A. stronger prevailing winds and more hurricane activity
B. warmer Pacific waters and warmer winters
C. more hurricane activity and warmer Pacific waters
D. warmer winters and stronger prevailing winds
Answer:
A. stronger prevailing winds and more hurricane activity
Explanation:
edg2020
Which word or phrase below is defined by the following:
A relationship between two organisms in which one organism hunts the other.
Consumer
Predation
Producer
Decomposer
Answer
Predator
Explanation:
Answer: Predation
Explanation:
In predation, one organism, the predator, kills and eats another organism. (Predators hunt)
Which did Kepler notice about planetary motion that caused him to propose Kepler’s first law of orbital motion?
Answer is the distance to the sun varies.
I do not understand it. Can you please explain? Thank you.
Answer:
He is saying that the distance to the sun affects the orbit.
Explanation:
(:
Answer:
the distance of the sun varies because the earth has an elliptical orbit same reason some months are longer.
Explanation:
g you are given three bacterial cultures: Pseudomonas aeruginosa, Shigella sonnei & Escherichia coli and you carry out a Triple Sugar Iron (TSI) assay for each 1. The tube for P. aeruginosa shows a pink butt, pink slant with no gaps or breaks in the medium and no black precipitate 2. The tube for S. sonnei shows a yellow butt, pink slant with no gaps or breaks in the medium and no black precipitate 3. The tube for E. coli shows a yellow butt, yellow slant with no gaps or breaks in the medium and no black precipitate Which of these organism can reduce glucose but not lactose and/or sucrose?
Answer:
Test Tube 2 (S. sonnei)
Explanation:
Triple sugar iron agar test is the microbiological assay used to test the fermentation reaction performed by the bacteria. The fermentation process differs based on substrate and the acids formed as a byproduct.
The test is based on the byproduct formed as a result of fermentation. The test tube contains 1% lactose, 1% sucrose and 0.1 % glucose, ferrous sulphate, phenol red pH indicator.
When the bacteria ferment any of the three sugar, the medium turns yellow.
In test tube 1- The tube shows pink slant, pink butt and no black precipitate which indicates that no fermentation took.
In test tube 2- the tube shows pink slant, yellow butt and no black precipitate due to fermentation of Glucose only due to alkali acid reaction.
In test tube 3- the tube shows yellow slant and yellow butt which shows that glucose and either lactose or sucrose has been fermented.
Thus, test tube 2 (S. sonnei) is the correct answer.
give one reason mendel chose pea plants for his experiment .
Answer:
-Pea plants reproduce sexually
-Male and female sex cells on pea plants allowed Mendel to cross pollinate them
-Pea plants have a variety of traits
Explanation:
Heat moves from this source by convection and radiation
Answer:
In CONVECTION, heat energy is carried by the movement of particles of matter. In CONDUCTION, heat is transferred by particles vibrating. In RADIATION, heat is carried directly by electromagnetic waves. When a hot object touches a cool object, heat moves from the hot one to the cool one.
Explanation:
Movement of heat by a fluid such as air is carried out by convection and through electromagnetic via radiation.
What is convection and radiation?Heat is transferred by a fluid, such as water or air, by convection. As the fluid (liquid or gas) flows from one place to another, it also transfers heat. A current is the term used to describe the flow of heated water or air.
Radiation occurs when heat transfers directly from one source to another object as infrared energy waves. This is how the Sun's heat reaches Earth. In actuality, all heated objects emit heat toward colder objects. The molecules of the colder item accelerate as the heat waves impact them. The thing becomes hotter as its molecules move more quickly.
Learn more about convection, here:
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Which of the following explains one of the ways plants and animals depend on each other?
A
Animals make minerals, which plants take in through their roots and pass up to their stems.
B
Animals release water vapor when they breathe, which plants take in through their leaves.
C
Animals make their own food, which plants take in through their roots and pass to their leaves.
D
Animals release carbon dioxide when they breathe, which plants take in to help make food.
Answer:
Animals release carbon dioxide when they breathe which plants take in to help make food
Animals release carbon dioxide when they breathe which plants take in to help make food. So the correct option is D.
Why do animals and plants depend on each other?
All species present on earth depend on each other for performing basic life processes. Humans are not able to survive beyond a particular range of temperature and pressure. For all the species to survive, a healthy environment is required.
Plants and animals are dependent on each other. This is because, in ecological systems, no species can survive alone. Animals are dependent on plants. Plants are the primary producers in our ecosystem. They produce food that is consumed by primary consumers and the primary consumers are consumed by secondary consumers.
Plants use carbon dioxide for photosynthesis and it results in the production of oxygen. This is used by animals for the process of respiration.
Plants depend on animals for several reasons. These can be fruit and seed dispersal, pollination, and also for the carbon dioxide that the animals produce. Thus, both plants and animals are interdependent on each other.
Therefore, the correct option is D.
Read more about plants and animals, here
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is scientific method used to date fossils should be what
Answer:
Scientists called geochronologists are experts in dating rocks and fossils, and can often date fossils younger than around 50,000 years old using radiocarbon dating. This method has been used to provide dates for all kinds of interesting material like cave rock art and fossilized poop
Describe the microscopic structures you would expect to see in the lungs.
Answer:
Alveoli
Explain:
They are the workhorses of your respiratory system. You have about 480 million alveoli, located at the end of bronchial tubes. When you breathe in, the alveoli expand to take in oxygen. When you breathe out, the alveoli shrink to expel carbon dioxide.
ATP is formed from the breakdown of glucose in _____(1)_____, while glucose is formed from solar energy in _____(2)_____.
Answer:
(1) cellular respiration, (2) photosynthesis
Explanation:
true or false: the momentum is moving planets does not depend on their masses
This is false, because plants have angular momentum, which is found by the formula (mass x velocity x distance). Therefore, mass is an important factor in a planet's momentum.
The CRISPR/Cas9 system can cleave genomic DNA at sequences other than the desired target, a phenomenon referred to as off-target cleavage. To avoid off-target cleavage, sites targeted for mutation should appear only once in the genome. What is the minimum length of the part of an sgRNA molecule that binds DNA whose base pair sequence would be expected to be unique within the fruit fly genome
Answer:
correct answer: 14
Explanation:
the question is incomplete, so a graph with the complete questionnaire is attached and the requested question is answered
We will start from the exercise requesting the minimum length that a sequence forms with more than 1.4x10ˆ8 permutations
for this we deduce that two base pairs can have:
4 * 4 = 16 permutations
we deduce that 3 base pairs can have:
4 * 4 * 4 = 64 permutations
Thus we multiply successively until we reach that 14 base pairs can obtain: 2.68x10ˆ8 permutations that are random
Thus, the 14bp sequence will be found only once in the genome of the fruit fly.
Wildfires are _____.
Answer:
C
Explanation:
I think it is C I hope this helps!
How the musculoskeletal and nervous system develop as a human grows
Answer:
(look at explanation)
Explanation:
The central nervous system (CNS) controls most functions of the body and mind. It consists of two parts: the brain and the spinal cord. The brain is the center of our thoughts, the interpreter of our external environment, and the origin of control over body movement.
Plant species A cannot fight most fungal infections, while plant species B makes a protein that kills many fungi.
What is one possible way for humans to engineer species A plants that can produce the fungus-killing protein?
Answer:They can insert the gene for the protein from species B into a chromosome in species A.
Explanation:
The one possible way for human to engineer species should be that it should insert the gene for the protein.
What is fungal infections?It is known as the mycosis that represent the disease on the skin that should be caused by the fungus. There are various kind of species of fungi. It should be lived on dirt, on plants, or the surface on the household and even on the skin. It would leads into the rashes or bumps in the skin problem
Therefore, The one possible way for human to engineer species should be that it should insert the gene for the protein.
Learn more about fungal here: https://brainly.com/question/24859105
A grassland environment, called a savanna, would be able to support the energy needs of carnivores because
A
grasslands have grasses and plants to eat for animals that are not carnivores, which then provides animals for the carnivores to eat.
B
grasslands provide grasses and plants for carnivores to eat, which then provides food for animals that are not carnivores.
C
animals that are carnivores can survive by eating leaves and plants that grasslands have.
D
animals that are carnivores are able to hide from predators in the high grass of the grasslands.
Answer: A. Grasslands have grasses and plants to eat for animals that are not carnivores, which then provides animals for the carnivores to eat.
Explanation: Carnivores eat only meat there for they will not eat plants so they need a source of meat which is where the herbivores come in. The herbivores will eat the grass and when the carnivores need food they will hunt the herbivores
Answer:
A
Explanation:
f(x) = 16x2 + 32x - 9?
Answer:
this is bioldy site
Explanation:
Biologists notice that a population of ferrets introduced into a reserve begins to show exponential growth. The figures represent the population of the ferrets for the first four years after their introduction. Which set of figures represents the exponential growth of the ferrets? A. 50, 88, 145, 227 B. 50, 92, 90, 95 C. 50, 32, 17, 9 D. 50, 95, 59, 97
Answer:
A. 50, 88, 145, 227
Explanation:
The correct option would be option A.
When something grows exponentially, it means the growth increased at a high rate. More specifically, each rate of increase results in more or less doubling of the preceding rate. For example, if the current value of growth rate is 2 for a substance that is growing exponentially, the next growth rates will be 4, 8, 16, etc.
In this particular illustration, the only option that best fit into an exponential system is option A in which the growth rate more or less doubles each time from 50 to 88, from 88 to 145, and then from 145 to 227.
Answer:
A
Explanation:
I just got it right.
2.In what way is the plant’s vascular system like ours?
3.How have scientist classified all plants?
4.Give 2 examples of non-vascular plants. (This will take a little extra research.)
5.List the 2 major vascular tissues of a plant and tell what they do.
1.
2.
6.List the reactants and products of photosynthesis?
Reactants:
Products:
7.Both plant and animal cells have organelles. What are organelles?
8.Which organelle is responsible for photosynthesis?
9.Why is it incorrect to say plants “breathe” Carbon dioxide (CO2)?
10.Where would you expect to find plant cell with a high number of chloroplast?
11.What are the stomata and why are they important to the plant?
12.What is the job of the guard cells?
13.The venus fly trap or the pitcher plant are still considered plants. Why do they “eat” insects?
14 Your friend thinks mistletoe is normal plant. How could you explain why it is NOT considered a “normal” plant?
Answer:
2.The human circular system does pretty much the
same thing as a plant but the plant can also reproduce oxygen. The
human needs air so does a plant to live and make more air. The
human needs food so does a plant to stay healthy. The human needs
to drink water to live too so does the plant to stay alive
otherwise it will rot and fall apart.
Explanation:
What is the danger of combining foods?
Answer:
There could be chemical reactions like indigestion, fermentation, putrefaction and gas formation and, if prolonged, can lead to toxemia and disease.
Explanation:
Answer:
Bad food combinations can lead to stomach ache, bloating, fatigue, gas, and discomfort. If you continue consuming the wrong food combinations for a long period, it can result in rashes, chronic digestion problems, and bad breath.
Explanation:
What is an example of a direct economic value of biodiversity? *
O release of oxygen by green plants
O diseases caused by bacteria
O vaccines created from bacteria
O drinking water provided by watersheds
Answer: release of oxygen by green plants
Explanation:
Conservationistis strive to preserve or improve biodiversity in ecosystems, which includes monitoring populations of organisms to detect changes. Name two challenges that scientists may encounter when they’re monitoring populations of organisms in the wild.
Answer:
Conservationists are responsible to preserve or improve the biodiversity in ecosystem. Many wildlife sanctuaries are made to protect the biodiversity. There are several ways by which conservationists accomplish their aim such as monitoring populations of organisms to detect changes and promoting importnce of wildlife.
Two main challenges conservationists will face while monitoring population of organisms in wild are:
weather conditions may not support the monitoring equipments or clothing.Wildlife animals are dangerous and can cause harm.Hence, conservationists face the above challenges while dealing with wild.
Answer:
One challenge is cost. To effectively monitor populations in the wild, scientists need special equipment such as cameras, computers, and GPS monitoring equipment. Another challenge is accuracy. It’s impossible to count every single organism in an ecosystem, so scientists often work with estimates.
Explanation:
____ pathways include all the pathways that bring information ____
and spinal cord ____ the effector muscles and glands
the brain
A. Efferent; to; from
B. Afferent; to; from
c. Efferent; from; to
D. Afferent from; to
E. None of the above
Answer: B. Afferent; to; from
Afferent pathways include all the pathways that bring information to the brain and spinal cord from the effector muscles and glands.
Explanation:
Afferent signals come from outside stimuli and tell your brain what they are sensing, such as temperature.
Efferent pathways carries signals away from the central nervous system which includes the brain and spinal cords. There are signals that your brain sends to tell your body to do something, like blinking.
Jennie is driving her car on vacation. It is a 195 km drive from Jennie's house to her vacation spot. She takes 5 hours to get there.
What is Jennie's average speed?
A.
39 km/hr
B.
195 km/hr
C.
80 km/hr
D.
474 km/hr
what are other methods for mesureng bacterial growth
Answer:
The size of a population of microorganisms in liquid culture may bemeasured by counting cells directly or by first diluting the original sample and then counting cell numbers (see below), or by taking some indirect method such as the turbidity (cloudiness) of the culture.
Explanation:
