Answer:
The correct answer is "secondary succession, an ecological succession step where an area previously occupied by living beings is disrupted".
Explanation:
In ecological succession, an ecosystem changes and develops through a series of steps. The first step, is the primary successional stage where rocks or other sedimentary structures are colonized by microorganisms. The second step, where the ecosystems changes towards a relatively-stable mature stage, occurs when an area previously occupied by living beings is disrupted. This step is named secondary succession, and the most clear example of this phenomena occurs when wildfire clears oak and hickory forests.
_________15. Which one of the following feature is common in C3, C4 and CAM photosynthesis?
A. Fix CO2 twice in their cycle
B. Produce oxaloacetaate as their stable produce
C. Fixation of CO2 occurs by mesophyll cells
D. Their bundle sheath having chloroplast with no thylakoids
A. Fix CO2 twice in their cycle
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A cell has two pairs of submetacentric chromosomes, which we will call chromosomes IA, IB, IIA, and IIB (chromosomes IA and I B are homologs, and chromosomes IIA and IIB are homologs). Allele M is located on the long arm of chromosome IA and allele m is located at the same position on chromosome IB. Allele P is located on the short arm of chromosome IA, and allele p is located at the same position on chromosome IB. Allele R is located on chromosome IIA and allele r is located at the same position on chromosome IIB.
A. Draw these chromosomes, identifying alleles M, m, P, p, R, and r as they would appear in metaphase I of meiosis. Assume there is no crossing over.
B. Taking into consideration the random separation of chromosomes in anaphase I, draw the possible types of gametes that might result from this cell’s undergoing meiosis. Assume that there is no crossing over.
Answer:
A) Allelic position in the chromosomes:
IA ----------M------------:-----------P----
IB ----------m------------:-----------p----
IIA -----------------R--------------------:---------------------
IIB -----------------r---------------------:---------------------
B) Types of gametes (assuming there is no crossing over):
MPR; MPr; mpR; mpr.
Explanation:
In submetacentric chromosomes, the centromere is located near to the middle of the chromosomes.
Since these two pairs of homologous chromosomes do not undergo crossover, the resulting gametes after meiosis may have four (4) allele combinations.
A receptor is a structure that detects stimuli. The stigma (eyespot) of Euglenoids detects ____, assisting with phototaxis. A. light intensity and direction B. vibrations C. chemicals D. sound frequency and direction E. temperature change
Answer:
The correct answer is option A, that is, light intensity and direction.
Explanation:
A photoreceptive organelle witnessed in the motile or flagellated cells of unicellular photosynthetic species like euglenoids and green algae is known as the stigma or the eyespot apparatus. It permits the cells of the organism to detect the intensity and direction of the light and react towards it.
This assists the organisms to either swim away from the light known as negative phototaxis, or to swim towards it known as positive phototaxis. The eyespots are the basic and the most typical eyes witnessed in nature. The eyespots comprise bright areas or orange and red granules of pigment and photoreceptors.
Which is a negative impact on the earth caused by human population growth?
Answer:
Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water.
Explanation:
Hope this helped.
Answer:
Destruction of Natural Habitats
Explanation:
Consider this plant cell.
The organelles in a plant cell are labeled. Part E is a complex of vesicles and folded membranes within the cytoplasm.
Which organelle is labeled E?
Golgi apparatus
chloroplast
ribosome
nucleus
Mark this and return
The correct answer is A. Golgi apparatus
Explanation:
In a plant cell, the cytoplasm contains organelles such as the chloroplast, the ribosome, the Golgi apparatus, among others. From these organelles, the Golgi apparatus is the one that is composed of vesicles and folded membranes, which makes it look like a system of flattened, long, and folded sacs or membranes connected. Additionally, this organelle is in charge of process proteins and lipids by packaging and modifying these before they go to other sections or organelles in the cell. According to this, the organelles labeled E is likely the Golgi apparatus because only this includes a set of vesicles and folded membranes.
Answer:
A. Golgi apparatus
Explanation:
Difference between striated muscle, smooth muscle and cardiac muscle.
Answer:
Cardiac and skeletal muscle are both striated in appearance, while smooth muscle is not. Both cardiac and smooth muscle are involuntary while skeletal muscle is voluntary. ... While skeletal muscles are arranged in regular, parallel bundles, cardiac muscle connects at branching, irregular angles, called intercalated discs. interenet lol
Explanation:
Answer:
Striated muscles are the muscles that allow your body to move. Smooth muscles are the ones in the digestive system that allow food to move along the gut. I'm not sure about the Cardiac muscle.. I think it's something to do with the heart.
Explanation:
Hope this helps :) Please comment if it helped..
Animals and dogs Plants absorb ____ from the atmosphere through _____
ASAP PLEASE
1. oxygen
2. nose and roots
Caregiving has been associated with:____________
a) a stronger immune response.
b) a higher percentages of T cells.
c) underproduction of proinflammatory cytokines.
d) overproduction of proinflammatory cytokines.
Place the following generation of action potential steps in order:
1) sodium channels are inactivated.
2) voltage-regulated potassium channels open and potassium moves out of the cell, initiating repolarization.
3) sodium channels regain their normal properties.
4) a graded depolarization brings an area of excitable membrane to the threshold.
5) a temporary hyperpolarization occurs.
6) sodium channel activation occurs.7) sodium ions enter the cell and further depolarization occurs.
Answer: 6) sodium channel activation occurs.
4)a graded depolarization brings an area of excitable membrane to the threshold.
7) sodium ions enter the cell and further depolarization occurs.
1)sodium channels are inactivated.
2) voltage-regulated potassium channels open and potassium moves out of the cell, initiating repolarization.
3) sodium channels regain their normal properties.
5) a temporary hyperpolarization occurs
Explanation:
action potential occurs when the differences in the concentrations of ions on opposite sides of a cellular membrane lead to a voltage of a specific cell location rapidly rises and falls.
The steps involved in this generation are;
First of all the sodium-gated channel activation occurs due to inflow of Na, this is called depolarization. A graded depolarization brings an area of excitable membrane to the threshold. More sodium ions enter the cell and further depolarization occurs. After which the sodium channels are inactivated due to the opening of voltage-regulated potassium channels and potassium moves out of the cell, returning it to it initial resting phase initiating repolarization. sodium channels regain their normal properties. a temporary hyperpolarization occurs which is a transient negative shift after an action potential occurs.
In his experiments with different competing pairs of Paramecium species, Gause found that sometimes both species persisted and sometimes only one species did. Which hypothesis did Gause propose in order to explain the cases in which both species persisted?
Answer: The options are not given, here are the options.
A. One species is much better competitor than the other.
B. Periodic disturbances allow for coexistence.
C. Two species tended to use different resources.
D. The two species experienced interference competition and not exploitative competition.
The correct option C.
Two species tended to use different resources.
Explanation:
From Gause experiments on competing paramecium pairs, He found out that most times both species persisted and sometimes only one did because the two species uses different resources.
Organisms normally compete for limited resources in order to survive and one intend to compete well while other suffer. Both in the case of competing paramecium pairs, the pair use different resources which make the to persist and survive well. Once the resource of one finishes, the other one will persist because it is still surviving on its available resources.
proof that something is true is called
evidence
opinion
Obelief
claim
Answer:
Evidence
Explanation:
Evidence is proof that something is true
Conduct research to find something interesting that proves protists are necessary.
Answer:
The slime molds are important to ecosystems because they act as decomposers which will release nutrients back into the environment. Earth basically depends on protists because they supply oxygen and are critical in the food chain.
An object is moving east, and its velocity changes from 65 m/s to 25 m/s in 10 seconds. Which describes the acceleration?
8
4 m/s2 in negative acceleration
4 m/s2 in positive acceleration
9 m/s2 in positive acceleration
9 m/s in negative acceleration
Save and Exit
Next
SED
Mark this and return
Answer:
4 m/s2 in negative acceleration
Explanation:
From the question.
Acceleration= change in velocity ÷ time.
V1-V0÷time.
That is final velocity minus initial velocity divided by time.
25-65÷10.
-40/10=4m/s.
The acceleration is -4m/s.
The answer is 4m/s negative acceleration.
Answer:
A
Explanation:
Got it right when submitted
The maximum water vapor that air can hold at 30°C is about 30 grams/cubic meter. If the humidity of the air is currently 6 grams/cubic meter at
the same temperature, the relative humidity is %.
Answer:
20%
Explanation:
6 ÷ 30 × 100
1÷5 × 100
20%
Imagine that a scientist studies two traits in cattle. The scientist noticed that oval is dominant over triangular with regard to snout shape. Additionally, long is dominant over short with regard to tail length. To determine if these traits are linked, two individuals that are heterozygous for both traits were crossed. The data in the table represent the number of offspring produced by this dybrid cross. Phenotypic ratio represents the predicted proportion of offspring with each set of traits that would be produced if the traits independently assort. What can be determined about these traits based on Chi-square analysis?
A) These traits do not assort independently.
B) There are not enough data to calculate a Chi-square value.
C) A Chi-square analysis cannot determine linkage.
D) These traits assort independently.
Answer:
C. A Chi-square analysis cannot determine linkage
Chi-square test compares observed and expected results. This test determines if a difference between actual and predicted data is due to chance or a link between variables. Therefore, option (D) is correct.
What is chi square test?Chi-square test compares observed and expected results. This test determines if a difference between actual and anticipated data is due to chance or a relationship between factors. The chi-square test is ideal for interpreting the relationship between two categorical variables.
The Chi-Square Test of Independence examines whether two sets of variables are related. This non-parametric test uses counts of two nominal or categorical variables. This test requires a large sample and independent observations.
Learn more about chi square, here:
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Shortly after a stream dried up, you noticed a change in the field mouse population coat color variation. When the stream was flowing, there were two populations, one with darker coats and one with lighter coats. After the stream dried up, mice with darker coats were being born into the lighter coat population and vice versa.
a. True
b. False
Answer:
a. True
Explanation:
When the stream dried up darker coat mice were seen into the lighter coat population and vice versa because of the natural selection process.
Mice change their coat color by adapting the changes in the stream flow and evolve their coat either dark or light that provides camouflage so predators won’t see them and they are able to survive in the environment. Mice have the advantage of surviving long and they are able to pass their genes to the offspring.
Hence, the given statement is true.
write down two differences between axon and dendrites.
Answer:
Axon takes information or impulse away from the cell body, whereas Dendrites bring information or impulse to the cell body of the neuron. Axons are long and single per cell and dendrites are short and multiple Axons don't have any ribosomes and Dendrites do.
What impact does the atmosphere have on the Earth's cycles? Select four options,
produces wind currents
transfers nitrogen from air to soil
transfers water into Earth's oceans
moves oxygen from volcanic eruptions for plants
moves oxygen and carbon dioxide through the biosphere?
Answer:
D
Explanation:
I think the atmosphere facilitates the distribution of oxygen and co2
Answer:
D
Explanation:
Calculate the efficiency of glycolysis if 12 kcal of energy are required to transfer energy from glucose to ATP.
Explain please
Answer:
The ATP has a full meaning . If you get to know the full meaning you will understand it
If a 160lb individual has 28% body fat how much of their body weight is fat in lbs.?
Answer:
44.8 lb
Explanation:
160 lb * 0.28= 44.8 lb
Answer:
44.8 lb
Explanation:
160 x 0.28 = 44.8
The same sentences are written with a substitution, deletion, or insertion, much as a gene may have a substitution, deletion, or insertion mutation. Identify which sentence represents a substitution, which represents a deletion, and which represents an insertion.
Answer:
The question is incomplete, the complete question has been added as an attachment.
THE DGR AN represents deletion mutation
THE RED ANA TRA N represents insertion mutation
THE FOX WTS RED represents substitution mutation
Explanation:
Mutation is a change in the nucleotide sequence of a gene. It can be of different types depending on how it occurs. A deletion mutation is that which involves the removal of one or more nucleotide base from the sequence.
An insertion mutation is the addition of one or more nucleotide bases to the sequence.
A substitution mutation is the replacement of one or more nucleotide base in a sequence.
The original sentences were:
1. THE RED ANT RAN
2. THE FOX WAS RED
3. THE DOG RAN
The three sentences that mutated/changed are:
1. THE DGR AN- in this sentence, letter O which represents one base is missing due to removal, making the original sentence (THE DOG RAN) alterated. Hence, this represents an example of deletion mutation.
2. THE RED ANA TRA N - in this case, Letter A has been added in between N and T. This makes the original sentence (THE RED ANT RAN) altered. Since addition of letter (base) occurred, this represents an example of insertion mutation.
3. THE FOX WTS RED - In this case, letter A in "WAS" was replaced by T, making the original sentence (THE FOX WAS RED) altered. Since a replacement of letter (base) is the case here, it represents an example of substitution mutation.
Explain how substitution, insertion, and deletion mutations are similar and different from one another.
Substitution:
Substitution is the switch of codons. A C could be switched to an A, but the original is now substituted for the new codon. This can change the amino acid present or it can be a silent mutation. If the stop codon is switched in, the protein will be cut short and the effects could be very serious.
Insertion:
Insertion is where base pairs are inserted into the DNA. This is different from substitution because nothing is getting switched out, just new ones are getting inserted. The original codons will still be present, just new ones are coming in. Insertions result in a frame-shift, which means everything after the mutation is shifted and nothing will be correct after this. Insertions are more harmful than substitution because it doesn't affect just one amino acid, but many.
Deletion:
Deletion is where some codons or DNA is deleted. This will result in everything after the mutation being incorrect and can cause drastic effects. Deletion is very similar to insertion because they both cause a frame-shift, but also very different because they do the opposite from one another. Deletion is also more harmful than substitution because of the frame-shift and the change in future amino acids.
both ethanol and glycine are small molecules of approximately equal molecular weight. However, ethanol is much more membrane permeable than glycine. What accounts for the large difference in membrane permeability between ethanol and glycine
Answer:
Ethanol is a non polar molecule.Therefore it passes through the cells membrane easily by diffusion like other non polar like CO2 and water.However, glycine is an amino acid ( the simplest amino acid) a charged molecule /polar molecule/.it can not therefore pass through the bilayer by simple diffusion because of the phospholipid bi-layers. Therefore special transport proteins are needed for its passage across the cell membrane.
Example-GLYT 1 and 2 are the carrier proteins specific for glycine transport across the membrane.
G
Explanation:
John is a 22-year-old professional skateboarder. He has recently fallen on his left shoulder which caused a severe dislocation of the joint. The clinician fears the impact and the dislocation may have caused damage to all or part of the brachial plexus. After performing a nerve conduction velocity test on Johnâs left arm, it was determined that the ulnar nerve was compromised. Which area of the brachial plexus was affected by the accident?
Answer:
The lower left area where the brachial plexus is, was affected in the axillary fossa.
Specifically in the area of the inferior nerve ramification, in the medial endings.
Explanation:
The brachial plexus is a nervous plexus that is classified into three nerve areas, the upper middle and lower areas, where the upper one faces the lateral nerve branches, the middle one to the posterior, and the lower one to the medial, within the medial nerves. is the ulnar nerve or the ulnar nerve that is the one that damaged John.
Which treatment is best for a person with persistent diarrhea
Answer:
do drink plenty of fluid
do drink a tea with chamomile and caffeine or aclcohol
Explanation:
this is the thing
How does the natural process of meiosis support evolution?
Answer:
During meiosis the step of crossing over is the major source of bringing evolution.
Explanation:
The chemical groups into which hormones can be divided include
how can digestive enzymes assist in breaking macromolecules down into smaller subunit?
Answer:
Chemical digestion
Mechanical digestion can only break up the food particles into smaller pieces. A chemical digestion process called enzymatic hydrolysis can break the bonds holding the molecular 'building blocks' within the food together. For example, proteins are broken down into their 'building block' amino acids.
Explanation:
HOPE THIS HELPS : D
Some fish have bony fins. If the body of water they are in dries out, these fins can be used to help the fish "walk" to another body of water. In this context, bony fins are an example of ________. A) an exaptation B) an adaptation C) a macroevolutionary event D) pedomorphosis
Answer:
A) an exaptation
Explanation:
Katie wants to make ball-and-stick models of the four macromolecules. She has colored balls for each of the elements in these molecules, including the following.
Answer:
I don't really understand what the question is, but I'm pretty sure you're asking for which molecules that will be needed; Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus
Explanation:
-Carbohydrate consists mainly of Carbon, Hydrogen, Oxygen, simple sugars have the basic formula of (CH2O)n. Some modification can be made to the sugar, but the main formula consists only with Carbon, Hydrogen, Oxygen.
-Proteins consists mainly of Carbon, Hydrogen, Oxygen, and Nitrogen for the amide groups. Some amino acid will need Sulfur for it's R Group.
-Fats consists mainly of Carbon, Hydrogen, and Oxygen just like Glucose.
-Nucleic Acids consists mainly of Carbon, Hydrogen, Oxygen, Nitrogen, and Phosphorus for the backbone of the Nucleic Acid. Nitrogen will be needed for the Nitrogenous Base.
I hope this is the answer you're looking for!
