Which of the following is an example of natural selection?
A
Over time, the Earth's crust started to solidify about one-billion years after the
planet was formed.
B
Over time, a species of cricket became green because green crickets were better
able to hide among the leaves.
с
In the winter, as food becomes more scarce, some species of birds fly to new
habitats in the south.
D
In June, the Northern Hemisphere gets more direct sunlight due to the tilt of
Earth's axis as it revolves around the sun.
Answer:
its b
Explanation:
i just did it :)
Phycobiliproteins are complex proteins in cyanobacteria that absorb light energy. There are three kinds of phycobiliprotein molecules used to pass light to chlorophyll: phycoerythrin—responsible for capturing green light, phycocyanin—responsible for capturing orange-red light, and allophycocyanin—responsible for capturing red light.
Since light can only penetrate to certain depths in oceans (figure 1), phycobiliproteins capture the light available and pass it through various pathways of phycobiliproteins until the emitted light is red, which is absorbed by chlorophyll. (4 points)
A. Explain the relationship between chlorophyll absorption and wavelength.
B. In addition to the pigments commonly associated with photosynthesis, a certain photosynthetic species contains two additional pigment types. Which of the following best justifies the claim that this species is better adapted to environmental changes than the cyanobacteria described above?
Answer:
Part A:
— Chlorophyll absorbs different wavelengths than chlorophyll does.
— Chlorophyll does not absorb wavelengths that are green and yellow, which is indicated by a very low degree of the light absorption.
Part B:
Photosynthetic Organisms are organisms capable of photosynthesis. Photosynthesis is greenery and other organisms using the energy from sunlight to synthesize foods from carbon dioxide and water. Leaving allophycocyanin to be the protein these plants and other organisms receive from the light. So for the process, in order for the plants to live they must be able to go through photosynthesis giving the plants the energy and proteins they need to produce food and to release oxygen into the environment.
Answer:
The visible spectrum is the only part of the electromagnetic spectrum that can be seen by the human eye. It includes electromagnetic radiation whose wavelength is between about 400 nm and 700 nm.
Visible light from the sun appears white, but it’s actually made up of multiple wavelengths (colors) of light. You can see these different colors when white light passes through a prism: because the different wavelengths of light are bent at different angles as they pass through the prism, they spread out and form what we see as a rainbow. Red light has the longest wavelength and the least energy, while violet light has the shortest wavelength and the most energy.
Photosynthesis, the sun’s energy is converted to chemical energy by photosynthetic organisms. However, the various wavelengths in sunlight are not all used equally in photosynthesis. Instead, photosynthetic organisms contain light-absorbing molecules called pigments that absorb only specific wavelengths of visible light, while reflecting others.
The set of wavelengths absorbed by a pigment is its absorption spectrum. The set of wavelengths that a pigment doesn't absorb are reflected, and the reflected light is what we see as color. For instance, plants appear green to us because they contain many chlorophyll a and b molecules, which reflect green light.
Although both chlorophyll a and chlorophyll b absorb light, chlorophyll a plays a unique and crucial role in converting light energy to chemical energy (as you can explore in the light-dependent reactions article).
All photosynthetic plants, algae, and cyanobacteria contain chlorophyll a, whereas only plants and green algae contain chlorophyll b, along with a few types of cyanobacteria Because of the central role of chlorophyll a in photosynthesis, all pigments used in addition to chlorophyll a are known as accessory pigments—including other chlorophylls, as well as other classes of pigments like the carotenoids. The use of accessory pigments allows a broader range of wavelengths to be absorbed, and thus, more energy to be captured from sunlight.
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XX=Female XY=Male.
your best friend has five children and they are all boys. They are expecting their 6th child. What would be the probability for their 6th child to be a girl? Why
Answer:
50% or 1/2
Explanation:
The probability of their 6th child being a girl would be 50% or 1/2.
During meiosis, the female produces X eggs while the male produces X and Y sperms. A random fusion of gametes then occurs during fertilization.
XX x XY
XX (female) XY (male) XX (female) XY (male)
XX - 1/2 or 50%
XY - 1/2 or 50%
Hence, the probability of producing a girl is 1/2 or 50% irrespective of the number of kids a couple might have produced already.
Which of the following shows some, but not all, characteristics of life?
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
1. Chromosomes are made of
and
Answer:
protein and DNA
Explanation:
What tools can be used to make observations of the sparkles of a mineral?
Hammer
Streak plate
Flashlight
Steel nails
Answer: Flashlight
Explanation: The sparkles of a mineral is also known as it's luster. For example, a diamond when in the sun or under a source of light will shine due to the reflection of the sun. A flashlight is also a tool that can be used to observe the sparkles of a mineral, or in other words it's luster.
Hope this helps! <3
A small loop of DNA that can get transferred from one bacterium to another bacterium is called a: A. Nucleus B. Plasmid C. mRNA D. Genophore
What is the process where water enters
the atmosphere by evaporating from the
leaves of plants?
A. Liquification
B. Transpiration
C. Sublimation
Answer:
B/Transpiration
Explanation:
Transpiration is evap- oration of liquid water from plants and trees into the atmosphere. Nearly all (99%) of all water that enters the roots transpires into the atmosphere. ... Sublimation is the process where ice and snow (a solid) changes into water vapor (a gas) without moving through the liquid phase
To grow, plant cells must produce new components of the cell membrane, including phospholipids and membrane proteins. Components of the cell membrane are most likely synthesized in which of the following cellular structures in a plant cell?
Answer:
endoplasmic reticulum
Explanation:
ER is full with proteins than help to synthesize phospholipids in plant cells
Please help me I do not know how
question 1. The construction of the Temple took seven years.
False True? question 2
Solomon sinned by allowing the corruption of God's people in the worship of idols.
True
False
Answer:
Question 1 true
question 2 true
Explanation:
HURRY IM TIMED ON THIS PLZ HURRY!!!
Answer: Aauaporin
Explanation:
Answer:
Exocytosis
Explanation:
I just did the and I got it right <3
A rabbit eats some grass. A fox eats that rabbit. A wolf comes along and eats the fox. What is this an example of:
decomposers
food chain
abiotic factor
fossil record
Why do girls get more girls? (genetically, not because "their girls and normally get long hair")
Answer:
wdym? I'm confused
Explanation:
Answer: girls have the gene to get pregnant and give birth
Explanation: what are you even asking
Are you talking about how girls get more babies or?
If yes then girls have the gene to get pregnant and give birth
SOMEBODY PLEASE TELL ME THE ANSWER TO THIS QUESTION HURRY I ONLY HAVE 41 MINITES LEFT TO TAKE THID TEST!!!!!
Answer:
What's the question?
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
what are the parts of the digestive system and their functions?
Mouth - break down food mechanically and chemically
Salivary Glands - produce saliva that contains enzymes which chemically break down food
Esophagus - move food from mouth to stomach through a process called peristalsis
Stomach - chemically break down food with stomach acid, mechanically break down food with the contracting of stomach muscles
Liver - creates bile that helps with digestion, stores, distributes and breaks down nutrients
Gallbladder - temporarily stores bile and squeezes it into the small intestine to break down fat droplets
Pancreas - produces pancreatic juice that contains digestive enzymes and bicarbonate
Small Intestine - absorbs nutrients from chyme
Large Intestine - absorbs water and dries out food, turning it into waste
Rectum - stores waste before it leaves the body
Anus - an opening where waste exits the body
Food-borne illnesses can have substantial health and economic consequences. Correctly identify the steps that can lead to food-borne illness by Salmonella/Campylobacter and E. coli 0157:H7
1. Bloody diarrhea and hemolytic uremic syndrome can result
2. Live E. coli 0157:H7 bacteria are ingested
3. A Shiga-like toxin is produced
4. Incomplete cooking of raw hamburger fails to kill all pathogens
5. Live Salmonella or Campylobacter bacteria are ingested
6. Diarrhea, abdominal pain and nausea can result.
7. Incomplete cooking of poultry and fruits/vegetables fails to kill all pathogens
8. The pathogen multiplies in the intestinal tract for 2-48 days
Answer:
4,6,5,1,3
Explanation:
from the big bang that occurred 13.7 billion years ago came
Answer:
huh
?
I'm confused on the question
Answer:
Our universe was born about 13.7 billion years ago in a massive expansion that blew space up like a gigantic balloon. That, in a nutshell, is the Big Bang theory, which virtually all cosmologists and theoretical physicists endorse. The evidence supporting the idea is extensive and convincing
Explanation:
How does the nitrogen cycle control the quality of water within a aquarium and what could cause an imbalance (build of toxic chemicals such as ammonium).
Answer:
Explanation:
Ammonia is removed from an aquarium system through the use of a biofilter. The biofilter provides a substrate on which nitrifying bacteria grow. These nitrifying bacteria consume ammonia and produce nitrite, which is also toxic to fish. Other nitrifying bacteria in the biofilter consume nitrite and produce nitrate.
pleas brainleast me
How do plants obtain carbon?
from animals that feed on the plants
from microorganisms that live in soil
from carbon in the soil
from carbon dioxide in the atmosphere
Answer:
from carbon dioxide in the atmosphere
explanation: when we breath out we are leaving carbon dioxide in the atmosphere and that is how plants get carbon dioxide and give us oxygen
Answer:
from carbon dioxide in the atmosphere
Explanation:
hope it will help you
Which object did New Horizons observe more closely than any other spacecraft in 2015?
-Mercury
-Venus
-Neptune
-Pluto
Answer is D pluto
Two days later, with about four months remaining before its close encounter, New Horizons finally became closer to Pluto than Earth is to the Sun. Pictures of Pluto began to reveal distinct features by April 29, 2015, with detail increasing week by week into the approach.
Please answer will give brainliest.
Which of the following is responsible for sensing excessive strength to protect the muscle
Answer: golgi tendon organ
Explanation:
When you lift weights, the golgi tendon organ is the sense organ that tells you how much tension the muscle is exerting. If there is too much muscle tension the golgi tendon organ will inhibit the muscle from creating any force (via a reflex arc), thus protecting the you from injuring itself.
Type the word that appropriately completes each statement.
All fish reproduce sexually, but fertilization may occur in one of two ways.
In__________
fertilization, the female fish releases eggs in the water or on a surface. The male fish spreads
sperm over the eggs to fertilize them.
In__________
fertilization, the eggs are fertilized inside the female's body. The young develop there until the
female gives birth.
exExplanation: external internal
Hello, 3Coli here!
Here is your answer:
In external fertilization, the female fish releases eggs in the water or on a surface. The male fish spreads sperm over the eggs to fertilize them.
In internal fertilization, the eggs are fertilized inside the female's body. The young develop there until the female gives birth.
Hopefully, this helps! :D
Ask your question below!
Predict the nature of the indicated covalent
bond.
H
H-C-N
-Н
H
H
H
polar
non-polar
Answer:
The nature of the indicated covalent bond is polar.
Explanation:
The given diagram is the Lewis structure of Methylamine which has the formula, CH₃NH₂.
In order to know that it is polar, we will discover that in the Lewis structure there are unpaired electrons in the central atom. Also, the bond that exists between the hydrogen and nitrogen shows that it is polar.
CH₃NH₂ is seen to have two charged ends that are opposite and the bonds that exists between hydrogen and nitrogen, which makes it a polar molecule.
The electronegativities of carbon, hydrogen and nitrogen can also be used to determine its polarity.
3.We anticipate our recombinant DHFR protein to be functional for use in future research applications. However, if you had been able to test functionality and found that your recombinant GST-DHFR-His protein was not functional, what would you propose is one potential issue you would investigate to troubleshoot further. In other words, what is one thing that could have gone wrong to result in non- functional protein from the method used and results obtained this semester
Answer:
In the given case, the protein would have required to go through the process of post-translational modification, however, the mentioned protein would have been cultured in the prokaryotic system, the process of post-translational modification would have failed to take place. This step would be essential for the functionality of the protein. Thus, there is a need to culture it within the eukaryotic system.
The covalent and generally the enzymatic modification of proteins post its biosynthesis is termed as post-translational modification.
where is the dna located in the eukaryotic cell
Answer:
Nucleus
I did this and I think it was right
Answer:
nucleus
The nucleus is particularly important among eukaryotic organelles because it is the location of a cell's DNA.
Which material would get electrons from the source to the load the fastest
Answer:
However, graphene has far fewer electrons than copper, so in graphene the electrical current is carried by only a few electrons moving much faster than the electrons in copper." In semiconductors, a different measure, mobility, is used to quantify how fast electrons move.
Answer:
D
Explanation:
D