Diatoms contain chloroplasts that have four membranes. These four membranes are evidence of secondary endosymbiosis (Option c).
What is secondary endosymbiosis?Secondary endosymbiosis is a hypothesis used to explain why diatom chloroplasts have four membranes.
According to this hypothesis, diatoms received different genes from distinct photosynthetic and non-photosynthetic ancestors.
The acquisition of genes of different ancestors led to diatoms having chloroplasts with four membranes.
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Each rung of the DNA ladder is made up of
A( single nitrogen base
B( pair of nitrogen bases
C( pair of carbon bases
D( single carbon base
can salt dissolve in water
Answer:
Yes, salt can dissolve in water
Explanation:
One example of this is the ocean.
Answer:
Yes!
Explanation:
:)
why does paramcium never die
Answer:
Paramecium never gets old because it keeps on dividing into new paramecium by reproduction.
During what phase of the cell cycle is the cell growing and preparing for cellular division
give five importance of birds egg
Importance of birds egg.
Birds provide insect and rodent control, plant pollination, and seed dispersal which result in tangible benefits to people.Birds have ecological value as important elements of natural systems.Oxygen diffuses into the egg through microscopic holes formed by the imperfect packing of the calcium carbonate crystals that compose the eggshell.Bird eggs are virtually self-contained life-support systems.In addition to the joys they bring to people's lives, birds are also valuable for economic reasons.[tex]cc[/tex]
Which statement compares the amount of surface fresh water found in different locations?
Select the correct answer.
1.The volume of rivers and wetlands is greater than the volume of the lakes.
2.The volume of groundwater is greater than the volume of ice and snow.
3.The volume of ice and snow is greater than the volume of lakes.
4. The volume of lakes is greater than the volume of groundwater.
Where is Earth's Water?
"Water, Water, Everywhere...."
You've heard the phrase, and for water, it really is true. Earth's water is (almost) everywhere: above the Earth in the air and clouds, on the surface of the Earth in rivers, oceans, ice, plants, in living organisms, and inside the Earth in the top few miles of the ground.
For an estimated explanation of where Earth's water exists, look at this bar chart. You may know that the water cycle describes the movement of Earth's water, so realize that the chart and table below represent the presence of Earth's water at a single point in time. If you check back in a million years, no doubt these numbers will be different!
Left bar: All water, freshwater, and saline, on, in, and above the Earth.
Center bar: All freshwater
Right bar: Only the portion of freshwater residing in surface water (rivers and lakes, etc), snow and ice, and relatively-shallow groundwater.
Here is a bar chart showing where all water on, in, and above the Earth exists. The left-sidebar chart shows how almost all of Earth's water is saline and is found in the oceans. Of the small amount that is actually fresh water, only a relatively small portion is available to sustain human, plant, and animal life.
Bar chart showing the distribution of water on, in, and above the Earth.
Sources/Usage: Public Domain.
Notice how of the world's total water supply of about 332.5 million cubic miles of water, over 96 percent is saline. And, of the total freshwater, over 68 percent is locked up in ice and glaciers. Another 30 percent of freshwater is in the ground. Fresh surface-water sources, such as rivers and lakes, only constitute about 22,300 cubic miles (93,100 cubic kilometers), which is about 1/150th of one percent of total water. Yet, rivers and lakes are the sources of most of the water people use every day.
Which of the following most accurately explains the greenhouse effect?
A. Long light waves enter the atmosphere and become trapped.
B. Short light waves enter the atmosphere, are reflected, and the waves get longer. These long waves are trapped by the atmosphere.
C. Long light waves enter the atmosphere, are reflected by the earth's surface, and waves shorten. These short waves are trapped by the atmosphere.
D. Incoming solar radiation is trapped in the upper atmosphere and then heats the layers below
Answer:
the last option is the correct answer
Explanation:light waves cause little to no heat to be trapped
The most accurate explains the greenhouse effect is Incoming solar radiation is trapped in the upper atmosphere and then heats the layers below.
What is Greenhouse effect?The greenhouse effect is the heating of the earth.
The gases that are trapped in the earth create a cover around the earth.
These gases prevent the heat from going outside the earth.
Some greenhouse gases are carbon dioxide, sulfur dioxide, methane, etc.
Thus, the correct option is D.
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PLEASE HELP I WILL MARK YOU BRAINLY I HAVE A TEST TOMORROW
Describe how the total energy in the ecosystem is conserved within the ecosystem in a bottle.
Answer:
The warmth from the sunlight causes the excess water in the terrarium to evaporate and rise to the top of the bottle. Once the water vapor reaches the top of the glass, it cools and condenses back into liquid droplets. These droplets drip back down onto the moss, creating 'rain' to keep the ecosystem moist.
Activity of integration 9 have been asked to importance of plants to man. The primary already knows that plants make food but they Your task 19 to work down in not more than cowords) the details of the structures involved you would explain this in know talk to the primary your former School. The talk is about class Seven do not the process knowledge of Biology. You can during your talk. talk using your your use the image below chloroplastccontains chlorophyll) Nucleus cytoplasm vacuole membrane cell membrane cellulose Cell wall Chapter summary A cell the basic unity where most lefe process take place •cells have different shapes, sizes and structures to carryout All living organisms are made up of cello specialized functions In multicellular tissues that Join group to form argan / body systems. organisms, cells combine to form together to form organs which
A DELETED
Explanation:
Which site is most commonly infected by mycobacterium tuberculosis
Answer:
The most common site of infection—and active tuberculosis—is the upper part of the lungs
Which of the following animals might have bioluminescence?
an animal that resides in the midnight zone
an animal that resides in the intertidal zone
an animal that resides in the photic zone
an animal that resides in the twilight zone
Answer:
Twilight Zone.
Explanation:
Viscosity is a measure of a fluid’s ?
A. Resistance to flow
B. Adhesive Forces
C. Average kinetic energy D. Buoyancy
DNA has the instructions for assembling which of the following?
Lipids
fatty acids
proteins
carbon hydrates
Answer:
Proteins
Explanation:
which force is a noncontact force?
A. a person pulling a wagon
B. a raft floating on water
C. a magnet attracting metal
D. all normal forces
Answer:
C. magnet attached to meta
Explanation:
hope this helps
Answer:
Magnet one
Explanation:
This is because the force is there but in a way it is not in contact with the object
What is the cell cycle? I’m asking brainly because my teachers never really get to the point.
Answer:
A cell cycle is a series of events that takes place in a cell as it grows and divides
Explanation:
Which organism in the food web can be a primary consumer and a secondary consumer?
O the fox
O the grasshopper
O the mouse
O the owl
Answer:
The mouse
Explanation:
Primary Consumers - squirrel, grasshopper, rabbit, mouse
Secondary Consumers - frog, mouse, fox, snake, owl
I hope this helps you :)
Answer:
Mouse
Explanation:
A mouse is a predator and a prey.
At a constant temperature and amount of gas, how are pressure and volume related? A. directly B. inversely C. not related
Explain the role of density in air circulation.
Answer:
Atoms and molecules of gas move from areas of high density to areas of low density and from areas of high pressure to areas of low pressure. ... The warmer air at the equator is less dense than the cold air of the poles. Thus, the air from the poles tends to flow toward the equator (toward the area of lower density).
Hopes this help
Explanation:
Explain the qualities of good seed
Answer:
I mean I nailed my amoung us admin swipe card first try ✌
Which of the following shows the results that you would get if you tested beef using the four tests in the Gizmo?
A. test tubes A B. test tubes B C. test C D. test tubes D
Answer:
c.test c
hope this helps :)
Explanation:
4000 years ago a population of cichlid fish were isolated in Lake Nagubago in central
Uganda. Since then 5 new species have formed, distinguished by their differing
coloration and mating rituals. These five groups of fish are considered unique species
because they do not naturally interbreed. ( it’s about patterns of evolution)
The populations of the cichlid fish are different species because they do not naturally interbreed.
What is a specie?
The term specie refers to a group of organisms that have the same characteristics and are capable of interbreeding with each other. Members of the same species have the similar genetic makeup.
The question is incomplete, however, we can truly conclude that their are five new species formed because they do not naturally interbreed.
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Cichlid fish had a lineage divergence during their evolution in the lake Nagubago
Lineage divergence (or speciation)
Patterns of lineage formation can be identified when constructing and examining a phylogeny. Phylogeny may reveal that a particular lineage has undergone unusually frequent speciation, creating a thick tuft of branches on the tree. It may also reveal that the lineage has a low rate of lineage divergence, represented by a long branch with few branches protruding from it. Or it may reveal that several lineages have experienced an “explosion” of divergence at the same time.
With this information, we can conclude that cichlid fish had a lineage divergence during their evolution in Lake Nagubago
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Are gender traits completely a result of societal expectations?
Answer:
I think The Alps will be a bit more than a few days away from the meaning of the day off today so I can get the rest of the people of the Himalayan region was farming handicraft and animal rearing and the former President of South Africa who is this the one who is the real phone number of Dhavni bhanushali who is the real phone number of Dhavni bhanushali who is the real phone number of Dhavni bhanushali who is the real phone number of Dhavni bhanushali who is the real phone number of Dhavni bhanushali who is the real phone number is switched on Europe's namaste to you later then I will tell you what I have to say to you and I will must pray for you and your family and all the best wishes for the back-to-school rush at his store today and I will must pray for you and your family a very happy birthday to u too my baby girl is not good night dear sir is there a way to 6 the baby girl from the meaning of the day off today so I can get the rest of the people of the Himalayan region was farming handicraft and animal rearing on Friday evening for the back-to-school rush at his store and the rest is a bit of the project for us all now but will be a little bit more of the people living.
Explanation:
I don't know what to do about it and sorry but Mark me the brainlist
g ______________ pair with UAC, UAU, and UGC codons. Group of answer choices tRNAs ribosomes elongation factors release factors initiation factors
The anticodons on tRNA are the ones that pair with codons on mRNA during translation.
TranslationIt is also known as protein synthesis.
During this process, the genetic codes on mRNA, otherwise known as codons, pair with their complementary anticodons on tRNA to release the respective amino acid.
The amino acids are linked together by peptide bonds to give the primary structure of proteins.
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What is the purpose of using genetic engineering to develop edible vaccines?
O to make vaccines that are capable of lasting years in the body to prevent future infections
O to diminish negative side effects that may occur from administering vaccines with syringes
O to enhance the flavor of vaccines so people are more likely to use them
O to prevent widespread diseases in developing countries without using syringes
Answer:
Yes, the correct answer is D: to prevent widespread diseases in developing countries without using syringes
Explanation:
I got it right in edg 2020
hope this is of help :)
The purpose of using genetic engineering to develop edible vaccines is to prevent widespread diseases in developing countries without using syringes.
Which is the advantage of using an edible plant vaccines?
Edible vaccines are effective as a delivery vehicle for immunization because adjuvants that enhance the immune response are not required. Edible vaccine can elicit mucosal immunity, which is not observed in traditional vaccines.
Thus, the option "D" is correct.
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in 1983 there was an abundance of rain 1359mm predict what the bird population looked like in 1984
The bird population increases in 1984 because of more availability of food in the form of seed.
How the bird population increase?The abundance of rain event leads to higher production of seed as compared to other wet season on the island. Most plant species responded by dramatically increasing seed production which provides more food to the birds and that's why the bird population increases.
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What type of cell is this?
The graph below shows a logistic growth curve.
D
c
Population size
B
Time
Between which two points in the graph does the population growth rate
decrease most?
A. Points A and C
B. Points C and D
ОООС
O C. Points A and B
D. Points B and C
The answer is option D
Explanation:
Hope this helped!
g DNA polymerase is the enzyme that synthesizes a complementary strand of RNA from a DNA strand. Select one: True False
Answer:
False
Explanation:
g DNA Polymerase enzyme synthesises a complimentary DNA strand from a DNA strand.
Which condition leads to a slower rate of weathering?
O porous rocks
O cold climates
O hard minerals
O high temperatures
Answer:
I would say cold climates. The only other answer would be hard minerals.
Explanation:
The condition responsible for a slower rate of weathering is cold climate.
What is weathering?
Weathering is the disintegration of rocks, soils and minerals as well as wood and artificial materials, usually assisted by high temperatures.
Factors responsible for weatheringWaterAtmospheric gasesAnimals, etcThus, the condition responsible for a slower rate of weathering is cold climate.
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One function of the human excretory system is
a.making materials that the body cells need
b.removing excess heat energy from the body
c.moving substances to and from body cells
d.controlling the body’s responses to stimuli
Answer:
c.moving substances to and from body cells
human excretory system is the system
which is responsible for moving substances from body cells