Answer:
y the end of meiosis, the resulting reproductive cells, or gametes, each have 23 genetically unique chromosomes. ... Each daughter cell is haploid, because it has half the number of chromosomes as the original parent cell.
Explanation:
30 chromosomes
Each daughter cell will have 30 chromosomes. At the end of meiosis II, each cell (i.e., gamete) would have half the original number of chromosomes, that is, 15 chromosomes. 2.
From a diploid germ cell 2n =24 double stranded chromosomes, meiosis will produce four gamete haploid cells n =12 single stranded chromosomes.
Meiosis produces four with half because double stranded chromosomes represents DNA replication. Twice as much DNA as a diploid cell needs.
From a diploid germ cell 2n =24 double stranded chromosomes, mitosis will produce two diploid daughter cells 2n =24 single stranded chromosomes for the same reason.
DNA replication doubles the genome before cell division. Sister chromatids of double stranded chromosomes represent the replicated DNA. During cell division, sister chromatids of double stranded chromosomes are separated into different cells.
Meiosis has two stages, the first separating homologous pairs of double stranded chromosomes, and then the second stage separating sister chromatids into four haploid (n) gametes.
What is true about the two daughter cells formed after the binary fission of a bacterium cell?
A) They have the same primary DNA but may have different plasmids.
B) They have variations in the primary DNA but may have a different set of plasmids.
C) They have variations in the primary DNA but have the same set of plasmids.
D) They have the same primary DNA and the same set of plasmids.
Answer:
A
Explanation:
They have the same primary DNA but may have different plasmids.
The two daughter cells which are formed after the binary fission of a bacterial cell have the same primary DNA but may have a different set of plasmids. Thus, the correct option is B.
What is Binary fission?Binary fission is a type of asexual reproduction where a cell body is separated into two different bodies.
During binary fission, the genetic material of an organism is duplicated in the parent cell which enables the two new organisms formed to be able to contain the separate copy of DNA in their nucleus.
In a bacterium cell, when the two daughter cells are formed after the process of binary fission, they contain the same primary DNA but have different plasmids.
Therefore, the correct option is B.
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The energy made from the movement of molecules is called _____ energy.
A
geothermal
B
chemical
C
potential
D
kinetic
Answer:
D: kinetic
Explanation:
Kinetic energy is the energy of motion. This can be the motion of large objects (macroscopic kinetic energy), or the movement of small atoms and molecules (microscopic kinetic energy).
See the Punnett square above. What are the chances these parents will have offspring with a homo-zygous recessive trait?
2 in 4 (50%)
1 in 4 (25%)
O in 4 (0%)
4 in 4 (100%)
True or false: Desertification is a natural process caused by natural events. ANSWER QUICK
Answer:
true?
Explanation:
what are the functions of sex chromosomes?
All humans have 46 chromosomes, 23 derived from either biological parent who has their own set.
Sex chromosomes make gene passing possible through creating offspring.
Where do most transform boundaries occur?
Answer:
QUESTION:
Where do most transform boundaries occur?
ANSWER:
Transform Plate Boundaries are locations where two plates slide past one another. The fracture zone that forms a transform plate boundary is known as a transform fault. Most transform faults are found in the ocean basin and connect offsets in the mid-ocean ridges.
Explanation:
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what are the functions of bioreactor?
Answer:
The pricipal function of a accuretely designed bioreactor is to give a controlled environment to achieve optimal growth and/or product formation in the particular cell system employed.
Warm air is denser than cold air and it sinks.
A. True
B. False
Answer:
false, its less dense than air
Explanation:
Answer:
False
Explanation:
where the input molecules of respiration come from
Answer:
see the explanation
Explanation:
Most of the steps of cellular respiration take place in the mitochondria. Oxygen and glucose are both reactants in the process of cellular respiration. The main product of cellular respiration is ATP; waste products include carbon dioxide and water.
help its due this Wednesday
Answer:
first food chain:
The Producer: the trees
The Primary Consumers: elephants
The Secondary Consumers: the cheetah
The Scavengers: the termites
The Decomposers or Detritivores: mushrooms
second food chain
The Producer: grass
The Primary Consumers: zebras
The Secondary Consumers: the hyena
The Scavengers: the vultures
The Decomposers or Detritivores: microorganisms
the food web:
The Producers - the trees and grass.
The Primary Consumers – the zebras and elephants.
The Secondary Consumers – the cheetah, hyena.
The Scavengers – the termites, vultures
The Decomposers or Detritivores – mushrooms microorganisms.
If the amount of primary Consumers increases, the number of producers would decrease and the number of other consumers would increase, but after a short time their number would also decrease and it causes immigrations.
Also, there's a nice picture I have found on a site;
Pls help I’m failing
Answer:
C.
Explanation:
Not A. because it didn't mention that (and it's not true)
Not B. because that wasn't mentioned (and common sense tells you it incorrect)
C. because it was mentioned (differently) and it made perfect sense
Not D. because it didn't even talk about how many letters (or sounds) there was to be true (plus look at A. above)
Count the number of new species that form in each group beginning at 60 mya (the first three species in each group were present around 64 mya, the first time period sampled, so we don't know when those species first appear in the fossil record).
Answer:
hello your question has some missing information attached below is the missing information
answer :
New planktonic larvae species = 10 species
New Non-planktonic larvae species = 26 species
Explanation:
calculate for the number of new species that form in each group
From the question it can seen that 3 species were present before 60 mya in each set
hence to calculate for the number of new species that form in each group
= Total number of species - number of species present at the beginning of 60mya
Group 1 ( New planktonic larvae species )
= 13 -3 = 10 species
Group 2 ( New Non-planktonic larvae species )
= 29 - 3 = 26 species
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The trees in a forest were cut down to make room for a housing development. Explain how this impacts the environment.
Answer:
69
Explanation:
60+9=69
Nitrogen is used and reused by various organisms and processes as it cycles through the environment. Which of the following statements is false?
A. Plants use nitrogen to make proteins and other molecules
B. Nitrogen-fixing bacteria play a minor role in the nitrogen cycle
C. Urine from animals returns nitrogen to the soil
D. Decomposers release nitrogen compounds into the soil
PLEASE HELP FAST!!!!
As humans continued to burn more and more oil and natural resources what has happened
to the world's carbon dioxide output?
Answer:
Global warming 100% one of them. And Air pollution.
Explanation:
Good luck
Identify the labeled structures
Answer:
what labeled structures?
Explanation:
PLEASE HELP !! ILL GIVE 40 POINTS ; PLUS BRAINLIEST !! DONT SKIP ANSWER.
I need to know what is the answer for number 6 and 7 and that’s all
Answer: Both are correct
Explanation:
Which method would be best suited for neutralizing the acidic components of waste?
a. Incineration Incineration
b. Discharge to sewers, streams, and rivers Discharge to sewers, streams, and rivers
c. Chemical treatment Chemical treatment
d. Biological treatment
Answer: The method best suited for neutralising the acidic components of waste is chemical treatment. Option C.
Explanation:
Chemical wastes are seen during industrial processes. These wastes include: acids, alkalis, organic solvents, detergents, oils, dyes and heavy metals ( example; mercury, copper and lead). Normally, these wastes should be treated and made harmless before they are emptied into the rivers, lakes and seas. If not treated, the effect of these chemicals on the aquatic ecosystems is extremely harmful.
CHEMICAL TREATMENT of waste is a procedure which is carried out on dangerous acidic waste products to change its chemical properties by neutralisation with basic solutions. Neutralisation is a chemical reaction between a base and an acid. The products formed are salt and water which are less harmful to the ecosystem.
The ACIDIC components of the chemical wastes should be neutralised with an appropriate base solution before disposal to avoid it's harmful effects on the aquatic ecosystems. This is because most chemical wastes are non- biodegradable.
Betelgeuse is hotter than Spica.
True or false?
Answer:
False
Explanation:
Betelgeuse is roughly 3x less colder than Spica.
a. DNA replication produces two identical DNA molecules, called ________which separate during mitosis.
b. After chromosomes condense, the __________ is the region where the identical DNA molecules are most tightly attached to each other.
c. During mitosis, microtubules attach to chromosome; at the ____________
d. Ir dividing cells, most Of the cell's growth Occurs during ___________
Answer:
a. sister chromatids
b. histone
c. metaphase plate
d. interphase (if not a choice, then prophase)
What is the correct equation for the breakdown of ozone? please answer quick
Answer: This electricity converts the oxygen molecule to ozone. Our equation is as follows: 3O2 + energy = 2O3.
The correct equation for the breakdown of ozone can typically occur in a series of two steps known as the destruction of ozone. It is illustrated thus;
Cl + O3 ⇒ ClO + O2ClO + O ⇒ Cl + O2The net reaction of the above process is the reaction of an oxygen atom with an ozone particle to form two molecules of oxygen.
The catalyst in this reaction is chlorine because it undergoes changes as the process continues while ozone is removed in the process. In the presence of sunlight, atomic oxygen is formed.
This entire process is referred to as the destruction of ozone.
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Certain prehistoric events led to the formation of oil. Which of the following was one of those events? A giant wind storms destroy forests. B glaciers melted at the north and south poles . C Life in the sea died and was buried under sediment. D heavy flooring soaked the earths crust.
Answer:
C oil is just dead animal remains
Explanation:
During which cell division phase does the nuclear membrane disappear?
A) telophase
B) metaphase
C) anaphase
D) prophase
Answer:
B)Metaphase
Explanation:
During metaphase, the nuclear membrane disappears and the chromosomes become aligned half way between the centrioles.
Answer:
Prophase
Explanation:
D
What principle is used in the above diagram to calculate the amount of carbon dioxide that is absorbed by land?
Answer:
The law of conservation of mass
Explanation:
In physics and chemistry, the law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so the quantity can neither be added nor be removed.
rho = density
t = time
nabla = divergence
v = flow velocity field
A particular species of bacteria has a "a generation time" of 20 minutes. That is, every 20 minutes a single bacterium completes prokaryotic fission -- one bacterium is now two bacterial cells. This morning at 6:00 a.m. you made a sandwich and packed your lunchbox. What you were not aware of was that there were 10 bacteria cells of this species on the dollop of mayonnaise that you spread across your bread. At 12:00 p.m. (no on) You sit down and eat your entire sandwich! How many bacteria cells did you have for lunch? (Hint: use the formula 2axb x C = numbers of cells, where "a" - number of times per hour the bacteria reproduces, "5" the number of hours the bacteria had to reproduce, and "C" = the number of bacteria at the start).
Answer:
Number of bacteria cells = 2621440 cells
Explanation:
The generation time of a bacteria specie is the time it takes for a population of bacteria to double in number. The generation time for most common bacteria is quite short, about 20 minutes to 1 hour.
Bacteria reproduce asexually by binary fission, in which the parent cell divides into two to produce two identical daughter cells.
In the given question, the generation time of the bacterial species is 20 minutes.
The time that have passed from between the time the sandwich was packed at 6:00 am to lunch time by 12:00 pm is 6 hours.
Using the given formula in the hint: number of cells = 2^(ab) × C
Where a = number of times per hour the bacteria reproduces; b = number of hours; C = number of bacteria at the start
a = 60 minutes/ 20 minutes = 3; b = 6; C = 10
Number of cells = 2^(3 × 6) × 10
Number of cells = 2621440 cells
The technology time for the maximum not unusual place bacteria is pretty short, approximately 20 mins to one hour. The number of bacteria cells did have for lunch =2621440 cells.
Bacteria reproduce via way of means of binary fission, wherein the discern molecular divides into a time of the bacterial species is 20 mins.The time which has handed from among the time the sandwich became packed at 6:00 am to lunchtime via way of means of 12:00 pm is 6 hours.Using the given formulation withinside the hint: range of cells =2^ (ab)×C.Where a = range of instances in step with hour the reproduces; b = nu of hours; C = number of bacteria on the start.a = 60 mins/ 20 mins = 3; b = 6; C =10.The number of bacteria cells did have for lunch =2621440 cells.What is bacterial cel?Bacterial cells are exceptional from plant and animal cells. Bacteria are prokaryotes, because of this that they haven't any nucleus. A bacterial includes Capsule.
Thus it is clearly explained above that the number of bacteria cells did have for lunch =2621440 cells.
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20.
_Cell division in prokaryotic cells is
a. Sexual
b. Asexual
C. Mitosis
d. Interphase
Answer:
it's binary fission
because --The cell division process of prokaryotes, called binary fission, is a less complicated and much quicker process than cell division in eukaryotes. ... The single, circular DNA chromosome of bacteria is not enclosed in a nucleus, but instead occupies a specific location, the nucleoid, within the cell.
Which of the following solutions would best address the issues of greatest concern in the community?
Construction of a seawall
Answer:
Construction of an offshore breakwater
Explanation:
A beach community was recently negatively affected by a hurricane. Community leaders are looking for a potential solution to prevent damage from future hurricanes. Below is a list of their concerns as well as how important each issue is to the community.
Community Concerns Concern Level
Wave action Low
Beachfront development Low
Nearshore aquaculture Low
Health of nearby coral reef Moderate
Roosting bird species High
Storm surge threat High
Construction of an offshore breakwater
Who wrote about the idea that if more people are born then die it can lead 1 point
to war, famine, and will slow population growth.*
-Hutton
-Lamarck
-Malthus
-Farmers/Breeders
The antibiotic rifampicin blocks transcription in many bacteria. In the presence of the antibiotic, adding sigma factor has no stimulating effect on RNA synthesis. A footprinting experiment on a rifamycin treated sample shows that the polymerase remains located at the promoter site in the presence of eNTPs and Mg2 ion. What step of transcription is rifamycin likely to block
Answer:
transcription initiation
Explanation:
Transcription is a process by which genetic information from DNA is used to synthesize an RNA molecule, usually, a messenger RNA (mRNA), which is subsequently utilized to synthesize a protein by a process called translation. Transcription in prokaryotes has three steps:
1-Initiation: the RNA polymerase is a multisubunit enzyme (holoenzyme) composed of two α, one β, one β’ and one ω and σ subunits (α2ββ’ωσ). This holoenzyme binds to the promoter region of the template DNA strand.
2-Elongation. The sigma σ factor of the holoenzyme is released and the complex and the core enzyme (α2 ββω) moves along the template strand, thereby producing an mRNA sequence
3-Termination. This step can be Rho-dependent, where a protein named "Rho" recognizes the termination site and stop transcription, and Rho-independent (transcription continues until the termination sequence is reached).
In consequence, Rifamycin is likely to block the initiation of transcription because the core RNA enzyme needs to bind the sigma factor (σ) for initiation of transcription in bacteria.