Answer:
Explanation:
The first mass extinction is called the Ordovician-Silurian Extinction. It occurred about 440 million years ago, at the end of the period that paleontologists and geologists call the Ordovician, and followed by the start of the Silurian period. In this extinction event, many small organisms of the sea became extinct.
Answer:
at the beginning of this era
Explanation:
I need someone to answer number 9 please
HELP ASAP!!!!
The forelimbs of mice, bats, and whales all have a similar bone structure. This is an example of which type of evidence of shared ancestry?
Question 2 options:
adapted structures
homologous structures
embryonic structures
vestigial structures
Answer:
homologous structures
Explanation:
Homologous structures are organs or skeletal elements of animals and organisms that, by virtue of their similarity, suggest their connection to a common ancestor. These structures do not have to look exactly the same, or have the same function.
If phosphofructokinase experienced a mutation that interfered with substrate binding, then what other enzyme is going to be most immediately impacted in terms of accessing substrate
Answer: Aldolase
Explanation:
In the metabolism of glucose( glycolysis) phosphofructokinase is an enzyme that catalyzes the conversation of fructose-6-phosphate into fructose-1,6-bisphosphate. This in turn is converted to pyruvate after various steps of enzymatic activity in the glycolytic pathway.
If phosphofructokinase experienced a mutation that interfered with substrate binding, the enzyme that is going to be most immediately impacted in terms of accessing substrate is the ALDOLASE.
Aldolase enzymes cleave fructose-1,6-bisphosphate to triose phosphates( glyceraldehyde 3-phosphate and dihydroxy-acetone phosphate) facilitating an increase in anaerobic production of ATP in muscle.
Therefore, the substrate for binding of aldolase, which is fructose-1,6-bisphosphate is lacking due to mutation of phosphofructokinase enzyme.
Which part of the chloroplast MOST clearly uses modified surface-area-to-volume ratios to function efficiently?
A. thylakoid
B. outer membrane
C. stroma
D. ATP synthase
Answer:
it is c option storma that increases surface area
Answer:
the answer is A, thylakoid
Explanation:
I just took the whole unit test :)
A drug may cause decreased communication between neurons or between neurons and muscles or glands. What might be the common action of this drug to cause such varied effects
Answer:
acid
Explanation:
A peony plant with straight stamens and red petals was crossed with another plant having straight stamens and streaky petals. the seeds were collected and germinated, and the following offspring were obtained: 62 straight stamens, red petals 59 straight stamens, streaky petals 18 curved stamens, red petals 22 curved stamens, streaky petals. A) which allele in each pair is dominant B.) what were the genotypes of the parental plants C.) what further crosses would you make in order to get a definite answer for part a
Answer and Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached files.
Answer:
A) Straight (S) is dominant and Red (R) is dominantB) SsRr = Straight, red and Ssrr = Straight, streakyC) Straight, red = 3/16 , Straight, streaky = 3/16 , Incurved, red = 1/16 , Incurved, streaky = 1/16Explanation:
A) Straight (S) is dominant over incurved (s)
Red (R) is dominant over streaky (r)
B) SsRr = Straight, red
Ssrr = Straight, streaky
C) Sr sr
SR SSRr (straight, red) SsRr (straight, red)
Sr SSrr (straight, streaky) Ssrr (straight, streaky)
sR SsRr (straight, red) ssRr (incurved, red)
sr Ssrr (straight, streaky) ssrr (incurved, streaky)
Straight, red = 3/16
Straight, streaky = 3/16
Incurved, red = 1/16
Incurved, streaky = 1/16
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wwhat came first the chiven or the eggg
Answer:the egg
Explanation:Eggs were around the corner before chickens even lived
Answer:
The Chicken
Explanation:
The egg could only be made by two birds that (may not have been chickens but would later evolve into chickens) mated and laid an egg.
A force of 1 N is equal to which combination of SI units?
A. 1 $2 kg/m
B. 1 m/J's
C. 1 J/m-82
D. 1 kg-m/s2
Answer:
1 kg-m/s2
Explanation:
Explain the Role of the Most
bucco in Living Organisms
Click the statement that best describes the role of each element in living organisms.
Carbon
Oxygen
Hydrogen
DONE
Answer:
carbon
Explanation:
WILL GIVE BRAINLIEST WHEN POSSIBLE, STARS, EXTRA POINTS AND THANK YOU FOR THE RIGHT ANSWER!!
(Please give an explanation and no incomplete/absurd answer I really don't wanna report anybody lol)
Why might it be harder to convince people of the value of forest ecosystem services as opposed to the value of it's economic service?
Answer:
It might be harder to convince people of the value of the forest ecosystem services as opposed to the value of its economic service because truthfully, people have different ideas on what is important and what´s not. So some people may think that the forest has no worth and it doesn´t matter to them if it gets torn down or not, as long as it makes them money, but others may feel that a forest is a special place where animals and such have a place to be free. In the end, it´s always about money and morals. I hope this helps!!
Explanation:
helppp please i honestly don’t know
Answer:
hi
Explanation:
Can someone help me with this please. Thank you so much
Answer:
7. SS ,ss . Ss .sS
im pretty sure the rest is 50 %
Explanation:
What two forces contribute to the creation of an ocean gyre?
The Coriolis Effect and winds.
Salinity and winds.
The Coriolis Effect and water density.
Water temperature and winds.
Answer:The Coriolis Effect and winds.
Explanation:Ocean Gyres are Circular currents in the ocean that are formed by the Earth winds and the Coriolis effect- which is caused by the rotation of the earth.
Answer:
The Coriolis Effect and winds.
Explanation:
took the quiz
HELP ASAP! 50 POINTS!! WILL MARK BRAINLIEST!! THANK YOU!!
Complete the Punnett square for a dihybrid cross of a new type of cat: PpRr (mother) x ppRr (father)
Answer:
I hope this helps, if it doesn't help you please let me know, and I'll delete my answer!
What two substances make the backbone of the DNAmolecule?
.Complete the sentence
The addition or removal of genes from a population is referred to as_____________
Answer:
The answer is -
Evolution
Which amphibian is the scientist most likely observing? A scientist is observing an amphibian. It has brightly colored skin, four legs, sticky pads on its feet, and a long, narrow body, a salamander because it has sticky pads on its feet O a salamander because it has a long, thin body O a frog because it has four legs O a frog because it has brightly colored skin
Answer:
B
Explanation:
1 point
2. The most precise type of dating used for determining a fossil's age is
relative-age dating. *
True
False
Sharks and dolphins are not closely related but have many similar features due to the
environment where they are found. This is an example of:
A:Convergent evolution
B:Artificial selection
C:Natural selection
D:divergent evolution
According to the fossil record above, during which era did mammals first appear?
A)
Cenozoic
B)
Mesozoic
0
Paleozoic
D)
Modern Day
Answer: The answer is A
Explanation:
took the quiz on usatestprep
Answer:A)
Explanation: Mammals first appeared in the Cenozoic era. My teacher explained it and it's visable in the picture.
Which of the following are reactants in the process of photosynthesis?
Answer:
Photosynthesis requires sunlight, carbon dioxide, and water as starting reactants (Figure 5.5). After the process is complete, photosynthesis releases oxygen and produces carbohydrate molecules, most commonly glucose. These sugar molecules contain the energy that living things need to survive.
Explanation:
Answer:
carbon dioxide and water
Explanation:
which of the following are reactants in the process of photosynthesis?
Describe a temperature inversion.
Answer:
Temperature inversion also called thermal inversion, a reversal of the normal behavior of temperature in the troposphere ( the region of the atmosphere nearest earth's surface) in which a layer of cool air at the surface is overlain by a layer of warmer air.
Which of the following systems of the body interact when a stressful situation causes a person's heart rate to increase and pupils of the eyes to dilate?
A.
nervous system and excretory system
B.
endocrine system and nervous system
C.
respiratory system and nervous system
D.
nervous system and digestive system
Answer:
B
Explanation:
remember to imagine that blood in the heart is color-coded according to its oxygenation status. What color of blood would you expect to see in isabelle's left ventricle
Answer:
Red blood.
Explanation:
Red blood is for oxygenated blood, while blue blood is for deoxygenated blood.
The blood in Isabelle's left ventricle would be red, in other words, oxygenated. The left ventricle has oxygenated blood because this blood was first in the right ventricle. Then, it went to the pulmonary arteries, which led the blood to the capillaries close to the alveoli in the lungs. In this area, the deoxygenated blood dropped the CO₂ and took O₂ becoming oxygenated blood. Now, this blood is color-coded red and will go to the pulmonary venules, then to the pulmonary vein, and from there, it will go to the left atrium. Lastly, it will go to the left ventricle to start the systemic circulation, which is the one that distributes the oxygenated blood in the body.
what molecule is taken into to start the light dependent reaction
Answer: ATP, and NADPH. These energy-carrying molecules are made in the stroma.
9. Doctors tested a patient to find out what molecules were in her cells. Her cells contained normal
levels of oxygen molecules, low levels of amino acid molecules, and low levels of glucose molecules
Will this patient be able to exercise normally?
a
Yes, as long as her cells have enough oxygen, her body will be able to exercise,
b
No, her cells need glucose to react with oxygen to release enough energy to exercise.
С
No, her cells need amino acids to react with oxygen to release enough energy to exercise.
d
No, her cells need glucose to react with amino acids to release enough energy to exercise.
Answer:
b. No, her cells need glucose to react with oxygen to release enough energy to exercise.
Explanation:
Living organisms are able to perform any of their day-to-day activities due to the release of energy in their individual cells. The process by which this energy is obtained by their cell is called CELLULAR RESPIRATION. Cellular respiration is the process whereby glucose (from digested food) is broken down in the presence of oxygen to yield energy in form of ATP. The general equation is as follows:
C6H12O6 (glucose) + 6O2 (oxygen) → 6CO2 + 6H2O + ATP
According to this question, a doctor is said to test a patient for the content of molecules in her cells. Her cells were found to contain normal levels of oxygen molecules, low levels of amino acid molecules, and low levels of glucose molecules. This patient will NOT BE ABLE to exercise normally because her cells need glucose in optimal amount to react with oxygen to release enough energy to exercise.
Why do you think electron microscopes allow for greater magnification than compound microscopes?
Explanation:
Electron microscopes have a greater magnifying power than optical microscopes due to the use of shorter wavelength electrons.they allow magnifications of up to one million times the size of a specimen while optical microscopes can achieve a magnification of no greater than 1000x.
I hope it's helpful!
An Electron microscope allows for greater magnification than compound microscopes it utilizes electrons of a much shorter wavelength as compared to the visible light in a compound microscope.
What is an Electron microscope?An electron microscope may be defined as a type of microscope that utilizes a beam of accelerated electrons in order to construct or produce an enlarged image of tiny objects or specimens like virus cells.
The higher resolution power is the characteristic feature of the electron microscope. An Electron microscope allows a magnification of approximately one million times the actual size of objects or biological specimens.
While, when it comes to the compound microscope, the magnification power limits to a thousand times the actual size of objects or biological specimens.
Therefore, the utilization of electrons of a much shorter wavelength is responsible for greater magnification in the electron microscope.
To learn more about an Electron microscope, refer to the link:
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If a dog has 39 chromosomes in its egg cell, how many chromosomes are in its body cell?
In the Calvin Cycle, what is ultimately made?
A.H2O
B.Carbon Dioxide
C.Oxygen
D.Glucose
Answer:
D. Glucose
Explanation:
I'm 11 ok your lucky I know that...
If a gene sequence in one organism is highly similar to the sequence of another gene in another organism it is called
Answer:
This question lacks options, options are: a.related. b. homologous. c protein-coding, d. comparative. The correct answer is b.
Explanation:
Homology refers to the fact in which the sequences of two or more proteins or nucleic acids are very similar due to the fact that they have the same evolutionary origin. Normally two sequences have a high similarity because they are homologous, that is, they share a common ancestor. If two sequences in an alignment are from a common ancestor, mismatches can be interpreted as point mutations (substitutions), and gaps as insertion or deletion mutations introduced into one or both lineages in the time since they diverged.