Answer:
Abstract
The relative contributions of sexual and asexual reproduction to the genetic structure of populations can be difficult to determine for fungi that use a mixture of both types of propagation. Nuclear RFLPs and DNA fingerprints were used to make indirect and direct measures of departures from random mating in a population of the plant pathogenic fungus Mycosphaerella graminicola during the course of an epidemic cycle. DNA fingerprints resolved 617 different genotypes among 673 isolates sampled from a single field over a 3-month period. Only 7% of the isolates represented asexual clones that were found more than once in the sample. The most common clone was found four times. Genotypic diversity averaged 85% of its maximum possible value during the course of the epidemic. Analyses of multilocus structure showed that allelic distributions among RFLP loci were independent. Pairwise comparisons between individual RFLP loci showed that the majority of alleles at these loci were in gametic equilibrium. Though this fungus has the capacity for a significant level of asexual reproduction, each analysis suggested that M. graminicola populations maintain a genetic structure more consistent with random-mating over the course of an epidemic cycle.
Describe the contributions of Schlieden and Schwann to the cell theory.
Schwann - In 1839, he cells are the basic unit of animal structure
Schlieden - In 1838, he discovered cells are the basic unit of plant structure
Hope this helps
Whats sounds can dogs hear that we cant ?
Answer/Explanation:
Dogs have outstanding senses. not only do they have good smelling sense but they also have a good sense of hearing. Humans can't hear hear above 20,000 HZ. However, dogs can hear much higher pitches than we can. Dogs can hear up to 65,000 HZ. This is why we are unable to hear a dogs whistle, but the dogs can.
How did cyanobacteria aid the evolution of complex life on land? Do you think cyanobacteria are as significant to this process today as they were during Precambrian time?
Answer:
Oxygen, origin of plants and chloroplast.
Explanation:
The oxygen present in our atmosphere was generated by various species of cyanobacteria during the Archaean and Proterozoic Eras. origin of plants on the earth is other great contribution of the cyanobacteria. The chloroplast which is present in plants due to which they make their own food is actually a cyanobacterium living within the plant's cells.
Which of these changes to fuel consumption would lessen human
impacts on global climate?
Select one:
A) Decreasing research of all wind or water-based electricity generation technologies
B) Switching from coal to natural gas or nuclear energy to generate electricity
C) Increasing electricity production from coal
D) Banning any form of carbon emissions trading programs
Switching from coal to natural gas or nuclear energy to generate electricity will lessen human impacts on the global climate.
What is climate change?It is the changes to climate brought about by anthropological emission of greenhouse gases.
Greenhouse gases are emitted from human actions such as the burning of coal, removal and burning of forest layers, etc.
Thus, in order to lower human impacts on climate, replacing activities such as the burning of coal with clean technology such as nuclear energy to generate electricity would go a long way.
More on climate change can be found here: https://brainly.com/question/12346202
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The image below shows the cell cycle with checkpoints indicated in red. What will most likely happen if the cell finds a mistake at one of the checkpoints?
Answer:
I think it may be A. the cell will prevent division from occurring
The most likely to happen if the cell finds a mistake at one of the checkpoints is the cell will prevent the division from occurring. The correct option is A.
What are checkpoints in cell division?Cell cycle checkpoints are processes that monitor the sequence, integrity, and fidelity of the cell cycle's fundamental events. These include cell development to the optimum size, chromosomal replication and integrity, and correct segregation at mitosis.
The cell that divides to produce two daughter cells is known as the mother or parent cell in the process of cell division. Mitosis produces two offspring cells that are genetically identical to the mother cell. The cell cycle has four checkpoints. These are G1, S, G2, and M.
Therefore, the correct option is A. the cell will prevent the division from occurring.
To learn more about checkpoints, refer to the link:
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8. Which of the following is a polysaccharide?
sucrose
cellulose
fructose
glucose
Answer:
Cellulose i think?
Explanation:
Answer: Glucose
Explanation: Glycogen is a large, branched polysaccharide that is the main storage form of glucose in animals and humans. Glycogen is as an important energy reservoir; when energy is required by the body, glycogen in broken down to glucose, which then enters the glycolytic or pentose phosphate pathway or is released into the bloodstream. Glycogen is also an important form of glucose storage in fungi and bacteria.
When you exercise or sunbathe, you sweat. that sweat eventually evaporates. Why does this occur
Answer:
The sweat leaves your skin through tiny holes called pores. When the sweat hits the air, the air makes it evaporate (this means it turns from a liquid to a vapor). As the sweat evaporates off your skin, you cool down.
Use the crisscross method to find the chemical formula for the ionic
compound formed by aluminum (Al) and sulfur (S).
Help
Answer:
Al2S3
Explanation:
Which is the best evidence that continental plates continue to move?
A recurring weather patterns
B predictable cycles of solar events
C glacial movement and calving
D volcanic activity along the ring of fire
8. This
type of consumer is vital for making nutrients available to other organisms.
a. Decomposer
b. Grazer
Should we build more nuclear plants why or why not?
Answer:
I think not bc its bad for the environment.
What happens during cellular respiration?
SELECT ALL THAT APPLY
a Glucose is broken down to pyruvate.
b Respiration requiring oxygen occurs in the
mitochondria.
.
Most ATP is produced during glycolysis and the
Krebs cycle.
d The Krebs cycle occurs directly after glycolysis.
Answer: a. Glucose is broken down to pyruvate.
b. Respiration requiring oxygen occurs in the mitochondria.
Explanation:
Cellular respiration can be defined as the process in which oxidation of food occurs in the mitochondria and energy is released as ATP. The glucose which is six carbon molecule is most common substrate for oxidation and it is converted into pyruvate which is a three carbon molecule. This is occurs in aerobic cellular respiration. During cellular respiration 30+ ATP molecules are produced which is comparatively more than glycolysis and Kreb's cycle.
According to the base-pairing rules for DNA, which of the following statements
NOT true?
A always pairs with T
C always pairs with G
T always pairs with G
T always pairs with A
Answer:
T always pairs with A
Explanation:
I think so I'm super sorry if its wrong :)
According to the base pairing rule, guanine always forms a bond with cytosine, while adenine always pairs with thymine, T is not paired with G, hence option C is correct.
What is base-pairing in DNA?Because it is RNA, there is no complementary base pairing between the bases adenine and thymine in DNA. Uracil, which has a structure remarkably similar to that of thymine, is present in place of thymine.
Base pairing rule, guanine always forms a bond with cytosine, while adenine always pairs with thymine structure of DNA is created by the binding of these base pairs
Although they keep the two strands of DNA together, they are not strong enough to withstand replication.
Therefore, the base pairing rule, guanine always forms a bond with cytosine, while adenine always pairs with thymine, hence option C is correct.
Learn more about DNA, here:
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What products of the Calvin Cycle are used by the light reactions?
Answer:
ATP and NADPH
Explanation:
The Calvin cycle uses the reducing powers ATP and NADPH from the light dependent reactions to produce sugars for the plant to use.
In silkworms,yellow cocoon (B) is dominat over white cocoon(b). If the mom is BB and the dad is bb, what are the chances they have offspring with yellow cocoons?
Answer:
100 %
Explanation:
Dominance is a genetic phenomenon where a gene variant or allele masks the effects of another allele (of the same gene) in heterozygous individuals. This last gene variant is referred to as the recessive allele. In this case, the silkworm mother can produce only one type of gamete carrying the dominant gene (B) form, while the silkworm father can produce only one type of gamete carrying the recessive gene (b) form. In consequence, from this cross, all offspring (100 %) will be heterozygous (Bb) and therefore they will express the dominant trait (i.e., yellow cocoon).
Help -
this is important sksk I’m taking a test and I need a good grade
Will mark brainliest
Answer:northeast
Explanation:
If you need to drive from Dallas, Texas, to Salt Lake City, Utah, (about 1500 miles), and the speed limit is 60 mph most of the way, what is the least amount of time you will need?
Answer:
25 hours
Explanation:
Speed is a measure of the distance traveled by a body relative to the time taken to complete a trip or a journey. Mathematically, speed can be expressed as;
speed = distance/time
Hence, time = distance/speed
The distance covering Dallas, Texas, to Salt Lake City, Utah is about 1500 miles and the speed limit is 60 mph, hence;
time = 1500/60
= 25 hours
Therefore, the least amount of time that would be needed to cover the journey is 25 hours.
Answer:
25 hours is your answer
Explanation:
How are genetic relationships represented?
Answer:
Genetic relationships are analysed based on the comparison of allelic identity or differences, regardless of the number of SNPs that differ between two alleles of a gene, which simplifies the analysis.
Explanation:
Which object made up of one or more smaller unit objects would make the best model for a group of cells from a plant?
Answer:
D. Dresser
Explanation:
According to the unified cell theory "all living organism are made of one or more small cells" and new cells arise from one cell through cell division.
From the given examples, the best model for a group of cells from a plant is "dresser" because a cell is consist of small structures called organelles that perform specialized functions likewise a dresser can contain several objects that can act as organelles.
Hence, the correct answer is "D. Dresser".
its D
i took quiz lol
Scientific laws attempt to explain nature...
true or false
After radiation exposure, a cell that cannot divide will most likely stay in which phase?
Answer:
G0 phase
Explanation:
IF the cell doesn't receive a signal to divide, then it will go into a stage called the G0 phase. Most cells are in this stage until they receive a signal to divide, and then continue the cell cycle.
PLEASE HELP ME
Do you think it’s possible to capture energy from photosynthesis for human use? please explain
Answer:
No
Explanation:
I do not think it is possible because plants do photo synthesis in a organelle called chloroplast which humans do not have.
Which of the following is NOT a unique property of water?
A. Ice floats on the surface of lake
B. Water covers most of Earth's surface
C. Water cools very rapidly
D. Water causes evaporative cooling
Answer:
Water covers most of Earth's surface
Explanation:
I chose Water covers most of Earth's surface because this is a fact, NOT a unique property. A property is a thing the item has.
which characteristic of a living organisms is responsible for the production of oxygen in the leaf of plant exposed to sunlight
Answer: i got a better question
Explanation: how about asking why are cheating here lol:)
What climate conditions occur during La Niña?
O stronger prevailing winds and more hurricane activity
O warmer Pacific waters and warmer winters
O more hurricane activity and warmer Pacific waters
warmer winters and stronger prevailing winds
Answer:
Stronger prevailing winds and more hurricane activity .
Answer:
A: stronger prevailing winds and more hurricane activity
Explanation:
Just took Edge 2021 test
Accordingtocelltheory,whicharemadeofcells? a. Kitten, mushroom, bacteria b. Rock, kitten, catus c. Mushroom, rock, bacteria d. Bacteria, kitten, catus
Answer:
The correct answers are:
kitten mushroom bacteria (a)
Bacteria, kitten cactus (d)
Explanation:
The cell theory states that:
a) all living organisms are made up of cells
b) cells are the basic structural and organizational unit of life
c) all cells arise from pre-existing cells.
From the three statements above, all living organisms fall into the categories hence from the list, all the living organisms (Kitten, mushroom, bacteria, and cactus) are made up of cells. While rocks are non-living hence they are not made up of cells.
Answer:
All except for rock
Explanation:
16.Which type of sediments would be most common where a river meets an ocean?
A. biogenous
B. cosmogenous
C. hydrogenous
D. lithogenous
Reflex action
(a)
Miriam accidently touches a hot pot and quickly withdraw her hand. Describe
the series of events in the nervous system which causes Miriam to react thi
way
Answer:
Reflex action/reflex arc/reflex (allow "involuntary") The stimulus (heat) is detected by temperature receptors in the skin. This causes impulses to travel along a sensory neurone to the spinal cord, due to chemical changes across the synapses. Here they go along a relay neurone, and then are sent via a motor neurone to the effector (an arm muscle in this case). The muscle contracts, moving the hand away and preventing further harm.
What molecule is used as energy to directly fuel cellular processes like movement, growth and reproduction?
Answer: Energy
Explanation:
Energy. The glucose molecules serve as fuel for cells: their chemical energy can be harvested through processes like cellular respiration and fermentation, which generate adenosine triphosphate— ATPstart text, A, T, P, end text, a small, energy-carrying molecule—for the cell's immediate energy needs.
Will mark Brainliest!!!
Paragraph 5 looks at the types of fuels organisms need.Which of the Following statements is true?
1)Humans need a lot of fat molecules to avoid hunger
2)humans need proteins, fatty acids, vitamins & minerals
3)Humans need a constant supply of red meat
4)Humans need to take Vitamin B supplements
Please help & thank You
Answer:
2
Explanation:
Humans need proteins, fatty acids, vitamins, and minerals