Answer: Living things take in materials from their surroundings that they use for growth or to provide energy.
Nutrition
Respiration
Movement
Excretion
Growth
Reproduction
which of these events happended first?
C.elegans is a model organism and was the first eukaryotic organism to have its genome sequenced. The free-living nematode is often used in laboratories investigating nervous system development with all 302 of its neurons and their effectors categorized. Interesting control mechanisms have been investigated with reproduction, particularly with egg-laying in the nematode. There are 16 muscles, 2 types of neurons, and multiple receptors involved in the process of laying eggs in C.elegans, and there are mutations in all of those structures for the study of the process. One particular mutation that prevents the laying of eggs by the worm is rescued by the neurotransmitter, serotonin. That rescue suggests that the mutation is most likely in which of the following?
A. one of the muscles needed for egg-laying
B. a receptor for serotonin on cells needed for egg-laying
C. a pre-synaptic neuron involved in egg-laying
D. a post-synaptic neuron involved in egg-laying
Answer:
C. a pre-synaptic neuron involved in egg-laying
Explanation:
Serotonin (5-HT) is a neurotransmitter, i.e., a molecule that binds to specific receptors and thus transmits signals from one pre-synaptic neuron to another target cell. In humans, serotonin is involved in many physiological functions including sleep, mood, emotions, appetite, digestion, etc. Moreover, Caenorhabditis elegans is a model organism widely used in neuroscience research in order to understand neuromodulation at the level of individual neurons. In C. elegans, serotonin modifies behavior by regulating neuronal excitability and synaptic efficiency. Moreover, also in C. elegans, it has been shown that serotonin induces egg-laying and also provides a feedback regulatory mechanism by inhibiting the activity of the pre-synaptic neurons that release it. In consequence, in this case, it is expected that serotonin rescues the loss of function of serotonin receptors required for egg-laying by providing a regulatory feedback loop that contributes to serotonin adaptation.
Yeast causes faster rising than baking powder or baking
soda.
O True
O False
Answer:
true
Explanation:
if I'm wrong ok it's not my problem
How is a person exposed to toxins? Explain each. (There are three ways to be exposed to toxic substances.
Answer:
Three ways to be exposed to toxic substances:
1. Inhalation - Inhalation is when we are breathing something into our lungs. For example, a firefighter may ingest toxic gasses and chemicals when entering a burning house.
2. Ingestion - Ingestion is when we are taking something by mouth. If someone eats a piece of cheese that is expired, they will most likely get food poisoning.
3. Skin contact - Skin contact is when a substance is in direct contact with our skin. For example, if someone spills an acidic substance on their arm during science class, this is considered a toxin and they may get a painful chemical burn.
compare the mechanism of gaseous exchange between an insect and a mammal
Explanation:
Insects have water at the ends of their tracheoles for oxgen to dissolve in to diffuse. ... The circulatory system makes the gas exchange system in fish and mammals more efficient than the gas exchange system in insects. Mammals and insects both get their oxygen from air, while fish get oxygen from water.
What will happen to the passengers sitting on a train if the train comes to a sudden stop?
Answer:
Their organs will smash into their ribcage
Explanation:
Answer:
they would be sent forward/ whatever direction the tarin was going.
Explanation:
let's say the train is moving 20 mph
Therefore everyone/ everything in the train is also moving 20 mph. If the train just went to 0 mph. everyone would still be going 20 mph.
A cruise ship makes his way from when Island to another this ship is emotion compare with which preference point
The correct answer to this open question is the following.
Although you forgot to attach the options for this question we can say the following.
A cruise ship makes its way from one island to another. the ship is in motion compared with which reference point?
The correct answer is "a lighthouse on a nearby island."
In this case, that is the function of the lighthouse. To be the point of reference or the guiding element that the captain of the ship is going to use to keep the ship's trajectory correct.
Although there are uncontrollable external elements such as heavy storms, fog, or bad weather, the captain of the ship is going to be guided by the lighthouse.
What are three new things that you learned about the creation of the universe?
Answer:
The universe is 14 billion years old.
Quasars reside in the cores of galaxies.
We thought the expansion of the universe was slowing down.
We've seen the same moment of time on more than one occasion.
The three new things related to the development of the universe should be that it have the 14 billion years old, cores of galaxies, and the expansion should be fall down.
What is the universe?The universe refer to the space and the time that involved the planets, stars, galaxies, etc with respect to the matter and energy.
The big bang theory represent the cosmological description at the time of development of the universe.
In this way, the three new things should be learned.
Learn more about universe here: https://brainly.com/question/10117154
1. Compact, complex animals have internal exchange surfaces that are extensively branched or folded, providing a large _____________.
2. In the _____________, nutrients are absorbed across the many fingerlike projections of the lining of the intestine.
3. In the _____________, oxygen and carbon dioxide are exchanged across the epithelial linings of sacs at the tips of tiny air tubes.
4. In the _____________, wastes are removed from the blood across the epithelial linings of excretory tubes.
5. The _____________ transports materials between the exchange surfaces of other organ systems and body cells.
6. Body cells are bathed in _______________, and exchange between body cells and the blood takes place through this fluid.
Answer:
1.) Surface area
2.) Digestive system
3.) Respiratory system
4.) Urinary system
5.) Circulatory system
6.) Interstitial fluid
Explanation:
In higher complex animals, such as the vertebrates, the internal exchange surfaces are modified in such a way to facilitate the transfer of materials from cell to cell in the body. As animal size increases, diffusion distances increase and the ratio of surface area to volume drops. Larger organisms have had to evolve specialized systems that are made up of structures that provides a large surface area for internal exchange of materials. Examples of these systems include:
--> DIGESTIVE SYSTEM: The fingerlike projections of the lining of the intestine provide a large surface area for the absorption of nutrients.
--> RESPIRATORY SYSTEM: This ends with a sac called the alveolar sac. The anatomical arrangement of capillaries and alveoli produces a very large surface area that is available for gas exchange.
--> URINARY SYSTEM: wastes are easily removed from the blood across the epithelial linings of excretory tubes.
--> CIRCULATORY SYSTEM: transports materials between the exchange surfaces of other organ systems and body cells. An example is seen in the relationship between the alveoli and the capillaries surrounding it.
For any exchange of materials to occur between cells the fluid known as the INTERSTITIAL FLUID which fills the intercellular spaces allows dissolved materials to be exchanged between body cells and the blood
Which class of organic molecules is used for long term energy storage in animals?
a. Carbohydrates c. Amino Acids
b. Triglycerides d. Proteins
Answer: Triglycerides
Explanation:
Fats are the primary long-term energy storage molecules of the body. Fats are very compact and light weight, so they are an efficient way to store excess energy. A fat is made up of a glycerol, which is attached to 1 to 3 fatty acid chains.
The relationship between bacteria and legumes that results in nitrogen is best described as _______.
a.
parasitic
b.
mutualistic
c.
commensalistic
d.
none of the above
The relationship between bacteria and legumes that results in nitrogen is best described as mutualistic.
WHAT IS MUTUALISM?Mutualism is the type of association between two organisms in which both parties benefit from one another.
An example of mutualism is the relationship between bacteria and leguminous plants.
Leguminous plants provide shelter for the bacteria while bacteria help the plant to fix atmospheric nitrogen.
Therefore, the relationship between bacteria and legumes that results in nitrogen is best described as mutualistic.
Learn more about mutualism at: https://brainly.com/question/2357375
How did the polar bears get their white fur?A.Bears have various alleles for fur color ranging from dark to light. Those bears with the lighter fur had a better chance of survival in the biome, so they lived and reproduced passing on their light colored gene to their offspring. As generations passed, white fur became more common.B.As a polar bear grows up, its fur gradually gets lighter, so by the time they are a teenager, they have fully white fur and are then best suited to survive in their environment.C.Polar Bears migrated from the Pacific Northwest up to the Tundra and Arctic because they knew that they would have a better chance of surviving in this cold region.
Answer:
I believe it’s c report me if I’m wrong on this
Explanation:
what kind of fault forms between two plates that are converging?
Answer:
Reverse faults occur at convergent plate boundaries, while normal faults occur at divergent plate boundaries. Earthquakes along strike-slip faults at transform plate boundaries generally do not cause tsunami because there is little or no vertical movement.
Explanation:
search in search engine
sorry about that
1. All of the following are examples of density- independent factors EXCEPT:
A) Weather
B) Predation
C) Natural disasters
D) Human activity
One side of section of DNA is shown below. A-G-C-T-T-G-A Which of the following would be the matching side of the section of DNA?
F A-C-G-T-T-C-T
G T-C-G-A-A-C-T
H A-G-C-T-T-G-A
J C-T-A-G-G-A-G
Answer:
G) TCGAACT
Explanation:
Which of the following receives energy directly from the sun?
Group of answer choices
decomposers
nutrient pool
consumers
producers
Answer:
producers
Explanation:
producers are plants, grass, etc.
No links please im already failing
Answer:
Think its the last one
The reason we see the moon change shape during the month is because
Answer:
As the moon orbits the Earth the Sun lights up different parts of it.
Which of the following represents MEiosis? *
10 points
It produces 4 haploid, 1️⃣N cells.
It produces 4 diploid, 2️⃣N cells.
Answer:
my answer will be it produces 4 diploid, 2 n cells
Which two systems are used in order for your muscles to churn the stomach and aid in digestion
Answer:
There's longitudinal,circular and obligue (diagonal)
Explanation:
These muscles allow the stomach to churn the food during digestion.
which gas is realese during respiration ?
based on questions 6 , 7 or 8 what happens to the voltage required in a circuit as the resistance decreases ? increases ?
Answer:
As the resistance decreases the Voltage Increases
Explanation:
What is digestion?
the process of breaking down food into small enough pieces to be absorbed by the cells
1. the process of eating and chewing
2. the process of releasing energy to the cells
3. the process of breaking down food enough to be swallowed
Which of the following groups makes up a system?
a. cell membrane, nucleus, cytoplasm
b. stomach, eyes, ears
c. heart, blood vessels, capillaries
d. food molecules, mouth, stomach
How is DNA condensed in order to fit inside cells?
Explanation:
DNA is tightly packed up to fit in the nucleus of every cell. As shown in the animation, a DNA molecule wraps around histone proteins to form tight loops called nucleosomes. These nucleosomes coil and stack together to form fibers called chromatin.
Inherited traits are:
A Dependent on diet
B Acquired during an organism's life
C Free of mutations
D Passed on from parent to offspring
Answer:
d
Explanation:
What does "Biotic" mean?
Answer: Biotic means a living factor in the environment. The opposite would be abiotic, which is a non-living factor like light, pH, wind, etc.
Explanation:
Answer:
Biotic describes a living thing of an ecosystem
Explanation:; For example organisms, such as plants and animals. Examples Water, light, wind, soil, humidity, minerals, gases.
A minor object orbiting in a solar system is a(n)
asteroid
regolith
meteorite
meteor
Tuberculosis is a disease caused by bacteria that is highly contagious.
Which changes show how tuberculosis affects the respiratory system?
A. fever and night sweats
B. vomiting and weight loss
C. loss of appetite and fatigue
D. cough and spitting up blood
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