Answer:
1) Jadon plans on carrying out an experiment involving the burning of steel wool to illustrate the conservation of mass. Steel wool is made of iron. When it is burned it combines with oxygen to form iron(III) oxide.
Which step in his experiment is the most important if he wants his experiment to correctly demonstrate the conservation of mass?
A.
The steel wool should be burned inside of a sealed jar or other closed system.
Explanation:
The explanation for number 1 is in the link below and the answer is provided also:
https://quizizz.com/admin/quiz/5dee60258f1145001bc02ed5/physical-science-2nd-9-weeks-practice-test-2020
the green colour pigment present in leaves chlorophyll true or false
Answer:
True
Explanation:
Chlorophyll produces a green pigment, which is why leaves look green
Answer:
true the green stuff is chlorophyll
Explanation:
A new trait that was never in the gene-pool before is called a
A) Adaptation
B) Mutation
C) Genetic Variation
D) normal
Answer:
B) Mutation
Explanation:
Mutation is a mistake in the Gene's I doesnt mean it's a bad thing or a good thing. It could be both
What is homeostasis?
[tex]\huge\text{Hey there!}[/tex]
[tex]\large\text{What is \underline{Homeostasis}?}[/tex]
[tex]\large\text{Homeostasis is the self-processing in the biotic structured which}\\\large\text{tended to perpetuate (maintain) rationally while it is modified}\\\large\text{its conditions that can be prototypical for surviving}[/tex]
[tex]\large\text{Homeostasis has.... }\\\bullet\large\text{ Controllable center(s)}\\\bullet\large\text{ Effectors}\\\bullet\large\text{Variables (aka Homeostasis)}\\\bullet\large\text{ Receptors}[/tex]
[tex]\text{Good luck on your assignment and enjoy your day!}[/tex]
~[tex]\frak{Amphitrite1040:)}[/tex]
[tex]\large\text{Here is what each of your features of homeostasis means}\downarrow[/tex]
WRONG ANSWERS ONLY!!! What is coastal runoff and what does it affect
Answer:
The sky.
(Purposely wrong.)
Which is required for a bacterial cell to replicate its DNA?
a. tRNA
b. DNA polymerase
c. Rna stand with an origin of replication
Answer:
c
Explanation:
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Answer:
box 4, because it has more atoms in the same amount of space
Polymerase Chain Reaction (PCR) technology is used for
a. DNA identification
b. DNA repair
c. DNA amplification
d. DNA cleavage
Answer:
The correct answer is c.
Explanation:
Polymerase Chain Reaction (PCR) technology is an in vitro enzymatic method that allows the amplification of a specific DNA sequence, that is, it is the DNA amplification technique by means of the polymerase chain reaction (PCR) is a technique that consists of the in vitro amplification of a specific DNA fragment. To carry out the amplification experiment, it is necessary to know, at least partially, the sequence of the fragment to be amplified (a gene, a part of a gene, a non-coding region, ...). Basically, it is about replicating the same DNA fragment over and over again and, for this, we must do in vitro what cells do in vivo to replicate their DNA. Generally, PCR begins with the denaturation or separation of the DNA double helix by heating the sample to a temperature between 94 and 96 ° C to break the hydrogen bonds that joined them, in this way each chain remains as a template for the synthesis of a new complementary strand of DNA.
A seed contains
A) cotyledons
B) xylem
C) stoma
D) phloem
answer:
a) cotyledons
explanation
What is the transfer of
heat from one object to
another through direct
contact?
Answer:
condiction
Explanation:
conduction is the transfer of heat between substances that are in direct contact with each other.
Phenylketonuria (PKU) is a genetic disease caused by the inability to break down the amino acid phenylalanine. If untreated it leads to severe mental disabilities. PKU is due to a recessive allele. Assume that the US population is in Hardy-Weinberg equilibrium with respect to this gene. In the US the PKU rate is 1 out of every 10,000 babies born. What percent of the US population have no alleles for PKU
Answer:
Therefore, 98% of the US population have no alleles for PKU
Explanation:
The Hardy-Weinberg equilibrium states that the amount of genetic variation in a population will remain constant from one generation to the next in the absence of disturbing factors.
The Hardy-Weinberg equilibrium is expressed quantitatively using a mathematical equation known as the Hardy-Weinberg equation. the equation is given below:
p² + 2pq + q² = 1
also, p + q = 1
Given a pair of alleles, S and s with A dominant and a recessive
where p is the frequency of the dominant allele in the population,
q is the frequency of the recessive allele in the population,
p² represents the frequency of the (SS) dominant genotype,
q² represents the frequency of the (ss) recessive genotype,
2pq represents the frequency of the heterozygous genotype
From the given question,
q² = 1/10000 = 0.0001
q = 0.01
from p + q = 1
p = 1 - 0.01 = 0.99
p² = 0.98
Therefore, 98% of the US population have no alleles for PKU
The first stage of the cell cycle during which the cell matures and prepares to divide and copies
its DNA; The stage the cell stays in the most?
The cell multiplies and creates a copy of its DNA during interphase. In the mitotic (M) phase, the cell divides into two new cells by dividing its cytoplasm and DNA into two sets.
What is the main role of interphase stage of cell cycle?A cell consumes the bulk of its time in what is known as interphase, where it creates, duplicates its chromosomes, and acquires available to split. The cell then moves interphase, goes direct mitosis, and completes dividing.
The cell multiplies and the nuclear DNA is duplicated during interphase. The mitotic phase immediately follows interphase.
Chromosomes that have been duplicated are separated and distributed across daughter nuclei during the mitotic phase. Usually, the cytoplasm is divided as well, producing two daughter cells.
Therefore, The first stage and the stage the cell stays in most is Interphase.
Learn more about interphase stage here:
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Explain how and why different parts of a plant are sinks for the translocation of sucrose at different times of the year in a country where there are season, such as Russia
Answer:
The sucrose is transported around the plant in phloem vessels. It needs to be able to reach all cells in the plant so that the sucrose can be converted back into glucose for respiration. The movement of sucrose and other substances like amino acids around a plant is called translocation .
Belowground organs of plants (e.g. roots and rhizomes) are sinks during plant growth since they cannot perform photosynthesis. Some organs are both a source and sink. Leaves are sinks when growing and sources when photosynthesizing
3. Calculate the kinetic energy of a paper clip shot from a slingshot. The paper clip's mass is 0.01 kg, and its velocity is 10 m/s.
a) 0.1 J
b) 0.25 J
c) 0.5 J
d) 1 J
Answer:
C
Explanation:
0.01kg*(10m/s)^2/2=0.5
4. PLEASE HELP!! 25 points!!! (((Timed!!)))
Name the enzyme diagrammed below.
true or false the fertilized ovary develops into a seed
Answer:
true
Explanation:
I've done this it's TRUE
During transcription, an RNA molecule is formed
a. that is complementary to both strands of DNA.
b. that is complementary to neither strand of DNA.
c. that is double-stranded.
d. inside the nucleus.
Answer:
c. that is double stranded
The primary colors of visible light are:
Answer: red, green and blue
Answer:
Correct / true
Explanation:
If you wanted to look at a cell wall.Which type of cell would you observe?
Answer:
Plant cell
Explanation:
If you are trying to observe a cell wall, you should look at a plant cell. There are only two different types of cells, which are plant and animal cells. The plant cell is the only one which contains a cell wall. Animal cells actually only have a cell membrane.
Please help me.!!!
Lol you’ll get 100 points
Answer:
Arteries carry blood away from the heart and veins carry blood back to the heart. The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide. These roadways travel in one direction only, to keep things going where they should.
Explanation: dont be men to me i have autism and savant syndrom
a = lil b = p c = a d = pi add it up lil papi
Explanation:
Pls someone help its a very easy question
Answer:
you got it right
Explanation:
The climate changes on Earth tend to be self-amplified. For example, the Earth is
currently going through a warming trend. As the Earth's temperature rises, the ice caps
and sea ice melt, reflecting less solar radiation. This results in more absorption of the
Sun's heat, causing the Earth's temperature to rise more, and the ice to melt more. This is
an example of what type of system?
Answer:
negative feedback
Explanation:
This is an example of negative feedback system.
What do you mean by negative feeback?Negative feedback occurs when some function of the output of a system, process, or mechanism is fed back in a manner that tends to reduce the fluctuations in the output, whether caused by changes in the input or by other disturbances.
Negative feedback (or balancing feedback) occurs when some function of the output of a system, process, or mechanism is fed back in a manner that tends to reduce the fluctuations in the output, whether caused by changes in the input or by other disturbances.
A negative feedback is a self-regulatory system in which it feeds back to the input a part of a system's output so as to reverse the direction of change of the output.
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In a process called transpiration, plants get rid of excess water through pores in the leaves called stomata. This excess water is then released into the atmosphere as part of the water cycle. Which of the following terms best describes how the released water enters the atmosphere?
Group of answer choices
precipitation
condensation
capillary action
evaporation
Answer:
Evaporation
Explanation:
The stage in the mentrual cycle usually lasting from 3to five days when fertilization does not occur.
A.ovulation
B.stimulation
C.menustration
D.reproduction
The ADG1(ADP glucose pyrophosphorylase 1) is involved in flowering timing in plants. You are interested in developing a DNA probe using partial protein sequence information. Part of the amino acid sequence is Glu-Glu-His-Asp-Val-Leu 1. determine the possible antisense oligo nucleotides possible from this amino acid sequence 2. How many total unique different oligonucleotide would need to be produced to cover all possibilities
Answer:
1) UUC-AUG-AUC-AAG-UAA.
2) 48
Explanation:
1) Determine the possible antisense oligo nucleotides possible from this amino acid sequence
Given that the peptide sequence is = Glu-Glu-His-Asp-Val-Leu 1.
we will use a codon table to show the codons and Anticodons for each of the Amino acids
Amino Acid Codons Anticodons
Glu GAA, GAG UUC, CUC
His CAU, CAC AUG, GUG
Asp GAU, GAC AUC, GUC
Val GUU, GUC, GUA, GUG AAG, GAC, UAC,CAC
Leu UUA, UUG, CUU, CUC, CUA, CUG | UAA, CAA, AAG, GAG,UAG,CAG
From the table above
The possible antisense oligo nucleotide sequence is : UUC-AUG-AUC-AAG-UAA.
2) How many total unique different oligonucleotide would need to be produced to cover all possibilities
A desired peptide sequence requires 16 anticodons
Hence the total unique different oligonucleotide needed to be produced to cover all possibilities = 16 *3 = 48
The ADG1(ADP glucose pyrophosphorylase is involved in flowering timing in plants and a DNA probe is made by using partial protein sequence information. Part of the amino acid sequence is Glu-Glu-His-Asp-Val-Leu.
1. To determine the possible antisense oligonucleotides possible from this amino acid sequence:
Since, for every amino acid, there is a specific codon and anticodons are present so according to the given information, the possible antisense oligonucleotides for Glu-Glu-His-Asp-Val-Leu is UUC-AUG-AUC-AAG-UAA.
2) The total number of unique different oligonucleotides that would need to be produced to cover all possibilities is 48
since the amino acid sequence is Glu-Glu-His-Asp-Val-Leu has 16 anticodons and each anticodon have 3 nucleotides so the possible number of oligonucleotides are :
16×3 = 48.
What are codon and anticodon?A codon is a trinucleotide sequence of RNA that corresponds to a specific amino acid.
An anticodon is a trinucleotide sequence complementary to that of a corresponding codon in a messenger RNA sequence.
Thus, according to codon and anticodon, the possible antisense oligonucleotides for Glu-Glu-His-Asp-Val-Leu is UUC-AUG-AUC-AAG-UAA and a number of unique different oligonucleotides that would need to be produced to cover all possibilities is 48.
To learn more about the codon and anticodon click here:
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how does biodiversity help with farming
Answer:
biodiversity is the basis of agriculture and our food systems. agricultural biodiversity also performs ecosystem services such as soil and water conservation, maintenance of soil fertility, conservation of biota and pollination of plants, all of which are essential for food production and for human survival.
good luck :)
hopefully, this helps
have a great day !!
Explain what would happen if the leaf tissue is kept at high temperature during the process of cell isolation
Answer:
Wilting of leaves occur.
Explanation:
if the leaf tissue is kept at high temperature during the process of cell isolation the leaf will shrink because of loss of all water. Due to high, temperature the stomata will be open and water is removed in order to remove heat from the body. A time comes that all water that is present in the cell will be removed and as a result wilting of leaves occur.
fertilization of an egg to form a zygote takes place in?
A.urethra
B.uterus
C.cervix
D.fallopain tube
______refers to the ability to cause change or do work.
A.friction
B.energy
C.gravity
D.distance
Answer:
B
Explanation:
Ive studied rhis before
What is exine is made up of????
what's wrong in asking these types to Question.. it's based on studies
Answer:
sporopollenin
While the exine is composed of sporopollenin, a complex and highly resistant biopolymer containing fatty acids, phenylpropanoids, phenolics and carotenoids, the intine is largely composed of pectin and cellulose.
Explanation: