Answer:
1. Darwin did not know how genetic material passed from one generation to the next because Mendel's laws of heredity had not yet been formulated
2. Finches have many phenotypic adaptations that can not be observed easily
3. Phenotypic traits are expected to evolve slowly, thereby taking many generations
Explanation:
In the Galapagos Islands, Darwin observed that there were many varieties of finches that showed variation in the size and shape of their beaks. Darwin determined that finches' beaks evolved in response to environmental changes (finches' beaks were different in different islands). Darwin had several challenges to make this discovery. First, Mendel's laws of heredity had not yet been formulated, thereby difficulting the analysis of quantitative traits (in this case, finches' beak) which are the result of the combined action of many genes and the environment. Second, finches (as well as all species) possess many phenotypic adaptations, thereby difficulting the study of single traits in an evolutionary context. Finally, phenotypic changes are gradual and therefore descendence with modification cannot be easily recognized by observation in the field.
Answer:
Traits other than beak type might affect natural selection.
It could take many generations to observe adaptions to a population.
The environment may be complex and hard to study.
Changes in the environment may occur faster or slower than changes to the birds
The birds may be interdependent with other organisms that may change, too.
Explanation:
just took the quiz
this the sample
Which organism is least related to the bird on this cladogram?
Answer:
SHARKS HAVE THE LEAST TRAITS IN COMMON WITH BIRDS.
Which kinds of pathogens caused most of the pandemics of the past
Answer:
bacteria pathogens caused most of the pandemics
20 points!!!!!!
Do prokaryotes have ribosomes? Why?
Answer:
yes they do because every cell needs ribosomes to manufacture proteins
Answer:
yes because all the cells need ribosomes in order to make proteins
Explanation:
Iridium (Ir) is a rare element on Earth, but common in
asteroids
volcanoes
the oceans
icy comets
g It has been proposed that integrin proteins undergo conformational changes when they bind to small molecules diffusing into the extracellular matrix. Because integrins are transmembrane proteins, a change in their conformation can be transmitted across the membrane to the portion of the protein that interacts with intracellular structures. What biological role does this allow integrins to play in a cell's function within a multicellular organism
Answer:
Cell-cell communication
Explanation:
Integrins are heterodimeric transmembrane receptors that facilitate the adhesion to the cell-extracellular matrix by attaching the cytoskeleton to this matrix. Moreover, integrins also help the cells bind with other cells. Integrins are responsible for the communication between cells and thus control tissue structure. These receptors are responsible for the attachment of fibroblasts to collagen, as well as the attachment of fibroblasts to fibronectin. It is also important to highlight that the binding of integrins with their corresponding ligands activates signaling pathways that control diverse cellular processes including, among others, cell growth, cell development, cell migration, phagocytosis, etc.
When practicing deep breathing, it is best to repeat the steps for minutes to start and then increase the time as needed.
Answer:
10- 15
Explanation:
When practicing deep breathing, it is best to repeat the steps for minutes to start and then increase the time as 10 to 15 minutes.
What is deep breathing?
Deep breathing is also called diaphragmatic breathing, abdominal breathing, abdominal breathing, and step breathing. As you take a deep breath, the air entering through your nose fills your lungs completely and lifts your lower abdomen.
Deep breathing seems unnatural to many of us. There are multiple reasons for this. For one thing, body image in our culture negatively affects breathing. Women (and men) tend to pull their abs together because flat bellies are considered attractive. This impedes deep breathing and gradually causes shallow "chest breathing" to appear normal, increasing tension and anxiety.
Shallow breathing limits the range of motion of the diaphragm. The lowest part of the lungs does not get enough oxygenated air. This can make you feel short of breath and anxious.
Deep abdominal breathing promotes complete oxygen exchange. That is, the beneficial exchange of incoming oxygen for outgoing carbon dioxide. Not surprisingly, it can slow the heart rate and lower or stabilize blood pressure.
Therefore, When practicing deep breathing, it is best to repeat the steps for minutes to start and then increase the time as 10 to 15 minutes.
To learn more about breathing, refer to the link:
https://brainly.com/question/3887418
#SPJ12
Which of the following is NOT found in the nucleus?
O Chromatin
O Mitochondria
Nucleolus
O DNA
Answer:
nuclius is
Explanation:
nuclius is pretty nice if your'e ask me
18
What part of the water cycle is represented by arrow Y?
w
(z
A evaporation
B precipitation
condensation
D runoff
Answer:b
Explanation:
HELPP ASAPP PLEASE !!!!
Answer:
galaxy x and z
An onion is obviously composed of plant cell which organelle will you not see in an onion cell
Answer:
multiple vaccules, cilium
Explanation:
Plzz helpppp!!!!! Will give brainliest and 10 pts!!!!
Explanation:
Red-shift
Emission spectra
Light from a star does not contain all the wavelengths of the electromagnetic spectrum. Elements in the star absorb some of the emitted wavelengths, so dark lines are present when the spectrum is analysed. Different elements produce different patterns of dark lines. The diagram shows part of the emission spectrum of light from the Sun.
A gradient colour spectrum of the sun.
Spectra from distant galaxies
Astronomers can observe light from distant galaxies. When they do this, they see it is different to the light from the Sun. The dark lines in the spectra from distant galaxies show an increase in wavelength. The lines are moved or shifted towards the red end of the spectrum. This effect is called red-shift. The diagram shows part of the emission spectrum of light from a distant galaxy.
A gradient colour spectrum of a distant star.
Red-shift and speed
Astronomers see red-shift in virtually all galaxies. It is a result of the space between the Earth and the galaxies expanding. This expansion stretches out the light waves during their journey to us, shifting them towards the red end of the spectrum. The more red-shifted the light from a galaxy is, the faster the galaxy is moving away from Earth
Explain how asexual reproduction works. what organisms undergo asexual reproduction?
Answer:
Asexual reproduction is a type of reproduction that does not involve the fusion of gametes or change in the number of chromosomes. The offspring that arise by asexual reproduction, either from a single cell or from a multicellular organism, inherit the genes of their single parent.
Answer:
Asexual reproduction is a type of reproduction that does not involve the fusion of gametes or change in the number of chromosomes. The offspring that arise by asexual reproduction, either from from a single cell or from a multicellular organism, inherit the genes of their single parent.
(it what it says on web.)
Explanation:
In the image of the food chain below the ____ is the producer.
A. Fungi
B. Hawk
C. Plants
D. Snake
Answer:
A
Explanation:Producers, also known as autotrophs, make their own food. SO its A
An animal cell lacking oligosaccharides on the external surface of its plasma membrane would likely be impaired in which function ?
Answer:
This question lacks options, the options are:
A) transporting ions against an electrochemical gradient
B) cell-cell recognition
C) maintaining fluidity of the phospholipid bilayer
D) attaching to the cytoskeleton
E) establishing the diffusion barrier to charged molecules
The answer is B
Explanation:
Generally, oligosaccharides are short chains of polysaccharides/carbohydrates. They make up the structure of membranes including the plasma membrane. Oligosaccharides attached to the protein content of the cell membrane to form a substance called GLYCOPROTEIN. The attached oligosaccharides functions in the ability for a cell to recognize another cell.
According to this question, if an animal whose cell is lacking oligosaccharides on the external surface of its plasma membrane, the most likely impairment would be that of CELL-CELL recognition.
Oligosaccharides are a type of carbohydrates that contain the combination of a few monosaccharides. The are also found as part of the components of the membrane.
If an animal cell lacks this type of carbohydrates (oligosaccharides), the function impaired would be the cell-cell communication function.
Oligosaccharides performs various functions as part of the component of the plasma membrane. It functions in cell to cell recognition and binding and communication. They usually contain 3-10 sugar units (monosaccharides).Learn more: https://brainly.com/question/22301340
How do cats catch worms
What is Anaerobic respiration?
Answer:
"Anaerobic respiration is the process of creating energy without the presence of oxygen. Sometimes the body can't supply the muscles with the oxygen it needs to create energy – such as in a sprinting situation."
I hope this helped!
Answer:
The release of a relatively small amount of energy by the breakdown of food substances in the absence of oxygen. Glucose is broken down to release energy in the absence of oxygen, forming lactic acid in muscle tissue, or alcohol plus carbon dioxide in yeast and plants.
Explanation:
Control and Data
a tentative, testable scientific explanation
useful for determining the effect of the independent variable
Answer:
cacacacacacacacacacacacacacacaca
Answer:
kkdm
Explanation:
kmlnui
Can you see individual cell without a microscope?
Please help me
In the image of the food chain below the ____ is the producer.
A. Fungi
B. Hawk
C. Plants
D. Snake
Define Physical Properties?
Answer:
A physical property is any property that is measurable, whose value describes a state of a physical system. The changes in the physical properties of a system can be used to describe its changes between momentary states. Physical properties are often referred to as observables. They are not modal properties.
Animals get the most of the nitrogen they need
Question 43 of 100
In the "Habit Loop", the actual "behavior" is called the:
a. Cue
b. Routine
c. Craving
d. Reward
Next Previous
Answer:
The Habit Loop is a neurological loop that governs any habit. The habit loop consists of three elements: a cue, a routine, and a reward.
nvm i got it but take some points by saying this question what are you thankfulll for
Answer:
I am thankful for my-
-friends
-family
-clothes
-food
-education
-shelter
PLEASEEE HELPPP! IT WOULD MEAN ALOT!
Answer:
umm i would help but i dont know what this is i'll try
Explanation:
avradge star:white dwarf, nutron star
massive star:super nova, planitary nubla
Two colleagues that share the same office are exposed to the flu virus one week in January. Janet just recovered from the same flu virus two weeks earlier, while Mark has not been sick yet this winter. Which person do you expect would be more likely to become sick with this flu virus and why?
Janet: since she already had the flu, her immune system is weaker than Marks.
Janet: she will most likely get the flu again, and a more severe case of it.
Mark: he has not acquired any active immunity to the flu, and Janet has.
Mark: he has only passive immunity to the flu which will not benefit him in this case.
I believe Mark is more likely to get sick with the flu virus because Janet has acquired a slight immunity because she was infected with it while Mark has not been infected with the virus
Pyruvate is broken down in the ______ cycle where the waste carbon dioxide is produced. Where does this cycle take place?
Answer:
Pyruvate is broken down in the Krebs Cycle where the waste carbon dioxide is produced.
The Krebs Cycle occurs in the mitochondria and requires oxygen (aerobic).
-Converts pyruvate into CO2
-Products: Co2, NADH, FADH2, 2 ATP
Scientists can identify the gene mutated in a bacterial auxotroph by transforming the cells with a genomic library in which fragments of the auxotroph's genome have been cloned into plasmids.
a. True
b. False
Answer: false
Explanation: this can only be true if the genes in the genomic library fragments have been identified and if the mutation is an SNP and not an inversion or deletion or insertion, whether they were cloned into plasmids or not.
e a sports
is in the trash
Answer:
K
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Answer:
and now you're trash
Explanation:
PLEASE HELp
The very slow movement of the continents is called _______________. *
Answer:
continental drift..........
Glycemia refers to the amount of glucose in a person's blood. What does it mean that the patient was
hyperglycemic? Why did this affect the doctor's decision to give the patient a normal IV?
Explanation:
A person that is Hyperglycemia has a high blood pressure causing problems, iv help maintain people blood sugar if u use a normal iv it might cause a high blood pressure can cause blood clot to form in your arteries leading to the brain blocking blood flow causing a stroke. I hope this helps