a carcinogen can either be a substance like colchicine or nicotine , UV radiaton, gamma radiation, X-rays, ionizing radiaton, and even viruses that cause mutations that lead to cancer
(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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A student conducts an experiment to determine how the amount of water given to a plant affects its growth. Which of the following is not a constant or control for this experiment?
a. the type of plant
b. the amount of soil
c. the amount of water
d. the amount of time in the sun
Please select the best answer from the choices provided A B C D
Answer:
Its C
Explanation:
How do Newton’s laws of motion explain why it is important to keep the ice smooth on a hockey rink so that players can pass a puck as quickly as possible?
Smooth ice reduces the inertia of the hockey puck.
Smooth ice increases the force used to accelerate the hockey puck.
Smooth ice reduces the unbalanced forces that would slow the hockey puck.
Smooth ice decreases the reaction force that the ice exerts on the hockey puck.
It is important to keep the ice smooth on a hockey rink because this reduces the unbalanced forces that would slow the hockey puck.
Frictional forcesFrictional forces are opposing forces to the motion of an object on a platform.
In order to be able to pass a puck as quickly as possible on a hockey rink, there should be a minimal frictional force on the ice surface on which the puck moves.
With minimal opposing forces, the puck will move as unhindered as possible and passing as fast as possible would be easy.
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Answer:
C
Explanation:
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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please help me if your right ill give you anything please hellppp
Answer:
C
Explanation:
An ecosystem food chain always starts with producers
Consumers then consume the energy from producers (prey on them)
Decomposers are organisms which break down dead material and provide energy to the environment for which producers can use which creates a looped cycle
____________ polymerase is used to add new RNA nucleotides to make RNA.
RNA polymerase is used to add new RNA nucleotides to produce RNA.
RNA polymeraseIt is the enzyme responsible for copying the sequence of DNA into the sequence of RNA during the process of transcription.
The information encoded in DNA is used to produce RNA during the process of transcription.
The production of RNA takes place by the enzyme RNA polymerase, by using the antisense strand of the DNA as the template by supplementing the complementary RNA nucleotides to the 3 prime terminal of the developing strand.
The enzyme RNA polymerase combines with the DNA at a sequence known as the promoter at the time of the beginning of transcription.
Thus, the given blank can be filled with RNA.
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Crossing-over between nonsister chromatids during meiosis is significant in heredity. This process most likely leads to an increase in which of the following?
which body system gives your body structure?
In which medium will a sound wave travel fastest?
ice at 0°C
iron at 150°C
liquid water at 75°C
helium gas at 50°C
Answer:
liquid water at 75° C
Explanation:
Hope this helps:)
Answer:
liquid water at 75° C
Explanation:
If cup b and cup e represent different ecosystems, how are they different
Can someone help me please, i cant find the answer to this question anywhere.
Answer:
light dependent reaction
At which stage of meiosis do chromatids separate and become daughter chromosomes?
Answer:
Meiosis II
Explanation:
ksksjsnsbsjjakakak
Summarize the order of events from egg and sperm to embryo?
(ill give brainliest)
Sperm fertilizes the egg, the egg turns into a zygote, the zygote then goes through the process of cell division and turns into an embryo.
• Post ejaculation, the sperm cells meet the egg, and fusion between both the cells takes place.
• The fusion results in the formation of a single cell, which comprises the genetic material from both the egg cell and the sperm cell, this is called a zygote.
• The zygote further divides into sixteen cells stage called the morula.
• Post three days after the formation of morula, formation of the embryo takes place. The embryo attaches to the wall of the mother's uterus.
Thus, egg and sperm fuse and give rise to the zygote, this zygote further undergoes several divisions and eventually results in the formation of an embryo.
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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:
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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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
Identify the parts of a good hypothesis?
Answer:
these are some of the answers i could come up with hope this helps
Explanation:
a good hypothesis is stated in the if then format.
a good hypothesis is testable
a good hypothesis is written clearly
a good hypothesis is educated
On February 21, a student observes that the Moon cannot be seen in the clear
night sky. On what date will the student not be able to see the Moon again in the
clear night sky?
A. February 28
B.March 7
C.March 14
D.March 21
Answer:
Okay so the answer is
C...
On February 21, a student observes that the Moon cannot be seen in the clear night sky. The date when the student is not able to see the Moon again is on March 21. The correct option is D.
What is the moon?The moon is the only natural satellite of the earth. It is white and gray and visible from the earth on nights only. It is the fifth-largest satellite in the solar system.
The moon has different phases seen from the earth because the moon revolves around the sun. The four phases have been named full moon, no moon, C moon, and half moon.
In 28 days, the moon is not visible for one day, then the other day it is visible and C-shaped. The student was seen on February 21.
21 + 27 day means 21 march.
Thus, the correct option is D. March 21.
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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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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
How does photosynthesis depend on chlorophyll?
!!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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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.
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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Please help i have no idea.
PLEASE HELP
Experimental question: At what pH and amount of substrate would the enzyme amylase would have the most amount of product (enzyme activity)?
Whats your Hypothesis
Answer:
can y'all answer option 1 plz
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
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.
Who is known as father of Zoology
A) Darwin B) Aristotle
C) Lamark D) Theophrastus
Answer:
Aristotle
Explanation:
Answer:
I believe the answer is B) Aristotle
Hope this helps :)