Answer:
Depressant substances reduce arousal and stimulation. They do not necessarily make a person feel depressed. They affect the central nervous system, slowing down the messages between the brain and the body. They can affect concentration and coordination.
Explanation:
If myself and science teachers around the world all designed and
conducted a series of experiments that all consistently showed that
students who stayed up all night playing Among Us before their finals did
-40% worse than students who didn't, that would be a
1)law
2)hypothesis
3) control
4)theory
Answer:
4) theory
Explanation:
Science is a branch of study that deals with answering questions and solving problems. However, there are different scientific principles used to tackle the problems in science. One of them is a THEORY, which is a detailed and well explained fact about a natural phenomena. A theory is said to be an hypothesis that has been subjected to series of experimental testing and found to be accurate or consistent.
In this question, a series of experiments was designed and conducted by several science teachers around the world. The results were found to be consistent that students who stayed up all night playing before their finals did -40% worse than students who didn't. This comprehensive and well explained observation using repeated experiments depicts a THEORY.
Please help i have no idea.
(Picture included) The student investigated the movement of water through plants. The plants were covered with clear plastic to capture any water released into the air. The plants received the same amount of water and sunlight.
Which conclusion is supported by these data?
- Leaves contain cells that store water for respiration.
- Leaves contain cells that control the release of water into the air.
-Leaves contain cells that absorb sunlight and water during photosynthesis.
- Leaves contain cells that stimulate growth by moving water through the plant.
Answer: C -Leaves contain cells that absorb sunlight and water during photosynthesis.
Explanation:
Leaves contain cells that absorb sunlight and water during photosynthesis. That's why after three hours the amount of water decreases as the number of leaves increases. Option (C) is correct.
What are stomata in leaves ?Water is taken up by roots from the soil and moved as a liquid by xylem to the leaves. Small holes in the leaves allow CO2 to enter the leaf for photosynthesis and water to escape as a vapor.
The rate of gas exchange is regulated by stomata, which are pores present in the epidermis of leaves, stems, and other organs. A pair of specialized parenchyma cells called guard cells surrounds the pore, controlling the size of the stomatal opening.
They are essential to photosynthesis because they allow carbon dioxide to enter the leaf and oxygen to leave. Additionally, the stomata aid in transpiration, the process of releasing water vapor through a plant's leaves.
Thus, option (C) is correct about leaves.
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(Help Please;Biology)
The sustainability of an ecosystem is its ability to survive changes. Which model shows the relationship between an ecosystem’s biodiversity and its sustainability?
A) Increasing Biodiversity; Increasing Sustainability/ Both arrows pointing to the right
B) Increasing Biodiversity; Increasing Sustainability/ Biodiversity pointing to the right, Sustainability to the left
C) Increasing Biodiversity; Unchanging Sustainability / Biodiversity pointing to the right, Sustainability Points Nowhere
D) Increasing Biodiversity; Increasing Sustainability/ Biodiversity pointing to the left, Sustainability to the right
Answer:
Answer is C
Have a great day!
The photo is above, please answer thank you!
Genotype:BB
Ratio:2/4
Percent:50%
Phenotype:black fur
Genotype:Bb
Ratio:2/4
Percent:50%
Phenotype:black fur
The questions are on the picture
Answer:
okkk.....
I will definitely study about it and tell u
How does photosynthesis depend on chlorophyll?
HELP PLZ ! Which nitrogen base sequence is the partner of T-C-A-G-C-A?
A-C-G-A-C-T
C-A-G-A-T-G
A-G-T-C-G-T
T-C-A-G-C-A
Answer:
A-G-T-C-G-T
Explanation:
Please mark brainliest :)
Answer:
A-G-T-C-G-T
Explanation:
What are the 4 structures all cells have in common?
Answer:
All cells share four common components: (1) a plasma membrane, an outer covering that separates the cell's interior from its surrounding environment; (2) cytoplasm, consisting of a jelly-like region within the cell in which other cellular components are found; (3) DNA, the genetic material of the cell; and (4) ..
Explanation:
The human digestive system is comprised of specialized cells, tissues, and organs.
Which lists the parts from least complex to most complex?
a. muscle tissue, muscle cell, stomach
b. muscle cell, muscle tissue, stomach
c. stomach, muscle tissue, muscle cell
d. stomach, muscle cell, muscle tissue
Thank you!
Answer
OPTION B.
because from muscle cell ,muscle tissue arise and then after development of muscle tissues organs are formed.
The parts from least complex to most complex is muscle cell, muscle tissue, stomach. So, the correct option is (B).
What is Digestive System?The human digestive system consists of the gastrointestinal tract with the accessory organs of digestion which involve breaking down food into smaller and smaller components until they can be absorbed and assimilated into the body.
The GI tract consists of series of hollow organs which is joined in a long, twisting tube from the mouth to the anus. The processes of digestion consists of six processes:-
1. Ingestion
2. Propulsion
3. Mechanical or physical digestion
4. Chemical digestion
5. Absorption
6. Defecation.
The complexity of the digestive system involves muscle cell, muscle tissue, stomach and organ system from least complex to most complex.
Thus, the parts from least complex to most complex is muscle cell, muscle tissue, stomach. So, the correct option is (B).
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A structure within a cell that performs a specific function is a(n)
A. organelle
B. organ
C. endoplasmic reticulum
D. flagella
Answer:
A structure within a cell that performs a specific function is an organelle.
Explanation:
An organelle is a structure inside the cell that preforms functions that are necessary for the cell.
Examples of organelles are the ER, the Golgi Apparatus, and the Mitochondria.
Hope this helps.
A structure within a cell that performs a specific function is an organelle. An organelle is a subcomponent of a cell.
What are cell organelles?Cell organelles are the ultrastructure's present in the cell and they show division of labor.
These organelles perform specific function for the cell and thus constitute the framework of all living organisms.
The basic structure of cell contains a plasma membrane, nucleus and cytoplasm. However, ultra-microscopic structures are embedded in the cell cytoplasm and they are designated as organelles in a cell.
Endoplasmic reticulum, Golgi apparatus, mitochondria, ribosomes, microtubules, lysosomes etc. are the specialized organelles present in cell.
Each of these organelles perform specific function. For instance, mitochondria help in energy production, Golgi helps in protein modification and packaging.
Cell organelles are thus important structural and functional elements of a cell.
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In shorthorn cattle, when a red bull (RR) is crossed with a white cow (WW), all the offspring are roan—a spotted, red and white color. What offspring are expected from mating a roan bull and a roan cow?
Answer:
25% red
50% roan
25% white
Explanation:
When RR (red) is crossed with WW (white), it results in roan color.
RR (red) x WW (white)
RW (roan)
Two roan individuals are then mated.
RW x RW
RR RW RW WW
Offspring
1/4 RR - Red
1/2 RW - Roan
1/4 WW - White
Hence, the offspring are expected to be 25% red, 50% roan, and 25% white.
can y'all answer option 1 plz
Ethylene oxide is a highly flammable gas used to sterilize medical equipment. To prevent a fire hazard, ethylene oxide
should only be used in an area
O with open windows and doorways.
with non-flammable equipment only
O without fire extinguishers.
O without sparks or flames.
Answer:
without sparks or flames.
~+ lil more info +~
Ethylene oxide is a highly flammable gas used to sterilize medical equipment. To prevent a fire hazard, ethylene oxide should only be used in an area: without sparks or flames. ... To prevent a fire hazard, ethylene oxide should only be used in an area: without sparks or flames.
To prevent a fire hazard, ethylene oxide should only be used in an area without sparks or flames. Thus, the correct option for this question is D.
What is ethylene oxide?Ethylene oxide may be defined as a type of highly flammable gas that is significantly utilized in order to sterilize medical equipment. It is a colorless gas with a sweet odor.
It is used primarily to produce other chemicals, including antifreeze. In smaller amounts, ethylene oxide is used as a pesticide and a sterilizing agent.
As this ethylene oxide is a highly flammable gas one must be required to keep this in a place or an area that is free from sparks or any other kinds of flames.
Therefore, to prevent a fire hazard, ethylene oxide should only be used in an area without sparks or flames. Thus, the correct option for this question is D.
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easy inherited or acquired question! please help me!
^-^
you learn to play the guitar, you are not born knowing how to play it, therefore it's acquired
[GT.02H]One scientist kept a radioactive material in a container. After two half lives, the amount of radioactive material left in the container was 2 grams. What was the original mass of radioactive material in the container? (4 points)
3 grams
4 grams
6 grams
8 grams
Answer:
6 Grams
Explanation:
Answer:
I believe the answer is A. 3 grams
Crossing-over between nonsister chromatids during meiosis is significant in heredity. This process most likely leads to an increase in which of the following?
A parameium will move away from direct light. This is an example of which characteristic of life?
a. homeostasis
b. reproduction
c. evolution
d. response to stimuli
Answer:
d. response to stimuli
What are the definitions for gene pool and allele frequency?
A. the alleles for a species, the number of times a gene appears
B.the number of alleles: genes that appear in a population
C.all the alleles that appear in a population: the number of times the alleles appear
D.all the genes that are present in a population; the number of times an allele occurs in a gene pool
Answer:
Allele frequency- the percentage with which a specific allele is found in a population. Gene Pool- the sum total of all alleles present in all populations of a particular species. ... evolution involved a change in allele frequency in a population's gene pool over a number of generations.
Explanation:
I hope this helps :)
A gene pool is defined as the number of alleles. and the allele frequency is defined as the genes that appear in a population. Therefore, option B is correct.
What is gene pool ?A gene pool is the collection of all the genes (including alleles) found in a population or species that is capable of reproduction. A big gene pool has a wide range of genetic diversity and is more resilient to environmental stresses.
A gene pool is the collection of all the genes, including all the various alleles, in any population that mates with other individuals from the same or different species. The percentage of an allele within a population is known as the allele frequency.
A population's gene pool will include a high number of genes with a wide range of frequencies. Gene frequencies are proportions of various alleles within a population, and in any given generation, these frequencies will rely on those of the previous generation.
Thus, option B is correct.
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Consider the diversity of living organisms on Earth and describe your thoughts on how meiosis might be responsible for that?
Color in flowers is codominant. If you cross a Heter0zygous spotted flower with a Hom0zygous Red flower, what is the % genotype and % phenotype of the offspring?
(Red: R, White: W)
This is an example of codominance where both allelles manifest when present.
we cross RR with RW
the offspring are RR RR RW RW
genotype:
50%RR 50RW
phenotype:
50%red 50%spotted
the most abundant animal
species on Earth?
Answer:
mammals
Explanation:
theres no explanation but technically humans are likely the most numerous species of mammal on earth at the moment.
It took all of human history to reach
a population of 1 billion in 1804, but
little more than 150 years to reach 3
billion in 1960. The world's
population now exceeds 7 billion.
What does this illustrate?
A. logarithmic
growth
B. exponential growth
C. logistic growth
Answer this question please!!
Osmosis does not require an additional input of energy from the cell.
Osmosis is considered to be a type of
active transport
endocytosis
passive transport
exocytosis
Answer:
Osmosis is considered to be a type of
active transport.
Explanation:
Answer:
passive transport
Explanation:
Osmosis is the process in which water molecules move from a region of higher water potential to a region of lower potential down a water potential gradient across a partially permeable membrane, so little energy is required to carry out this process, thus it is a form or passive transport.
!!I NEED HELP!!
What is a benefit to utilizing fusion reactions instead of fission reactions?
A)Fusion reactions do not require any kind of radiation shielding to prevent exposure.
B)Fusion reactions do not produce harmful radiation and transuranium nuclides.
C)Fusion reactions can proceed in any temperature range.
D)Fusion reactions are easier to control and regulate.
Answer:
B)Fusion reactions do not produce harmful radiation and transuranium nuclides.
Explanation:
___________
The benefit of utilizing fusion reactions instead of fission reactions is that the fusion reaction does not produce harmful radiation and transuranium nuclides. Thus, the correct option for this question is B.
What is meant by Fusion?Fusion may be defined as a type of process that significantly involves the combination of two or more atoms or molecules in order to form one larger molecule. This type of reaction normally occurred in nature as compared to fission.
The process of fission involves the disintegration of numerous smaller molecules or atoms from a larger one. This creates a lot of long-lived radioactive substances in nature that are harmful to live organisms. These types of reactions are not favored by nature.
Therefore, fusion reactions do not produce harmful radiation and transuranium nuclides are the benefit of utilizing fusion reactions instead of fission reactions. Thus, the correct option for this question is B.
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guys i really need help with my test it will depend if i get held back plz answer my question.....
A caterpillar morphing into a butterfly is an example of which of the following features of life?
A
Reproduction
B
Growth
C
Development
D
Need for food
Answer:
the answer is B- Growth
Answer:
Reproduction
Explanation:
treating depression
soon as treatment begins.
16. Delusions, hallucinations, and thought disorders are associated with
f Depression
h. Schizophrenia.
& Anxiety
j. Personality disorder.
bi
H: Schizophrenia
Hope this helps
Explain why the global water budget is balanced even though some regions have
water shortages
Answer:
The budget is balanced because our system is corrupted.
Explanation:
Some regions do not have places to spend this budget on water.
I'm timed!
Which of the following is not considered a natural science?
A. chemistry B. psychology C. biology D. physics
Please select the best answer from the choices provided A B C D
Answer:
B: Psychology