Answer:
The alveolar walls and capillary walls share a membrane. That's how close they're getting. This allows oxygen and carbon dioxide to readily pass from the respiratory system to the circulation. Oxygen molecules bind to red blood cells as they return to the heart.
How does the haploid form of ulva switch to its diploid form?.
The haploid form of Ulva switches to the diploid form when gametophytes produce cells that undergo mitosis to produce gametes that fuse to form a zygote. Therefore, option D is correct.
What are gametophytes?The sexual stage in the alternation of plant generations and some algae is called a gametophyte. This stage results in gametes that go through generational alternation. It produces the zygote from which sporophytes develop and is a haploid phase.
The gametophyte stage of life is the predominant one in bryophytes. The male and female gametes are produced by the gametophyte's antheridia and archegonia, respectively. Gametangia are all of these structures put together.
Thus, the haploid form of Ulva switches to the diploid form when gametophytes produce cells that undergo mitosis to produce gametes that fuse to form a zygote. Therefore, option D is correct.
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Your question is incomplete, most probably the full question is this:
How does the haploid form of Ulva "switch" to its diploid form?
A. Sporophytes undergo meiosis to produce spores that germinate into diploid adults.
B. Gametophytes produce cells that undergo meiosis and produce spores that germinate into diploid adults.
C. Sporophytes produce cells that undergo mitosis to produce gametes that fuse to form a zygote.
D. Gametophytes produce cells that undergo mitosis to produce gametes that fuse to form a zygote.
l The movement of land masses during the history of the Earth.
Answer:
The movement of the plates sometimes leads to earthquakes and tsunamis.
How do scientists think life may have begun on the Earth
Answer:
microbes that left signs of their presence in rocks that are about 3.7 billion years old.
Explanation:
Answer:
After things cooled down, simple organic molecules began to form under the blanket of hydrogen. Those molecules, some scientists think, eventually linked up to form RNA, a molecular player long credited as essential for life's dawn. In short, the stage for life's emergence was set almost as soon as our planet was born
The embryonic stage is the first phase of the prenatal stage, lasting only two weeks after conception. t f
The statement embryonic stage is the first phase of the prenatal stage, lasting only two weeks after conception is false.
What do you mean by Embryonic stage?An embryonic stage may be defined as the period after implantation, during which all of the major organs and structures within the growing mammal are formed.
The first two weeks after conception are known as the germinal stage, not the embryonic stage. The third through the eighth week is known as the embryonic period, and the time from the ninth week until birth is known as the fetal period.
Therefore, the statement embryonic stage is the first phase of the prenatal stage, lasting only two weeks after conception is false.
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Answer:
False
Explanation:
Got 100% on the Practice thing on Edge
Of the following, the most impactful action you can take to reduce your
carbon footprint is:
Answer: C. Eat a plant-based diet
Explanation: Of the following, the most impactful action you can take to reduce your
carbon footprint is: Eat a plant-based diet
Carbon footprint is the emission of the greenhouse gases like carbon. Lights should be turned off whenever not in use can help in reducing the carbon footprint. Thus, option A is correct.
What is a carbon footprint?
The carbon footprint is the amount of carbon, methane, and other greenhouse gases emitted due to natural or man-made activities. It is expressed in the terms of carbon dioxide released into the atmosphere.
The lights should be turned off whenever not in use to reduce the emission of the gases that harms the ozone and environment as the light energy release many greenhouse gases.
Therefore, the lights should be turned off whenever not in use to reduce the carbon footprint.
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Why were there no coal deposits formed during the Precambrian time? Choose the correct answer. There were no swamps with land plants. There was not yet enough carbon on Earth. There was not enough land on which coal deposits could form. There was not enough carbon dioxide in Earthâs early atmosphere
There were no coal deposits formed during the Precambrian period because there wasn't enough carbon dioxide in Earth's early atmosphere.
What is the Precambrian?The Precambrian is a Super Aeon, corresponding to the time period from the formation of the Earth (~4.6 billion years – b.a.) to the beginning of the Cambrian Period (~542 million years – m.a.).
With this information, we can conclude that there were no coal deposits formed during the Precambrian period because there wasn't enough carbon dioxide in Earth's early atmosphere.
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Often, ____________ or basidiomycetes are the fungi involved, and they form several layers of hyphae, one of which envelops the photosynthetic ____________ .
Most of the time in lichen, ascomycetes or basidiomycetes form the fungal part with several hyphae layers enveloping the photosynthetic algal part.
LichensLichens are composite organisms. They are formed from a symbiotic relationship between fungi and algae. The fungi provide shelter and some vital minerals for the algae while the algae provide food via photosynthesis.
Oftentimes, the fungi components are usually ascomycetes or basidiomycetes. They form a network of hyphae around the photosynthetic algae as a form of protection.
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If there is no fertilization, degeneration of the corpus luteum results in a drop in _____, which results in the sloughing off of the uterus's endometrium.
Degeneration of the corpus luteum results in a drop in progesterone production.
What is progesterone?Progesterone is a hormone produced by the corpus luteum that allows the uterus to prepare for fertilization. The halt in production of this hormone then causes the sloughing of the uterus's endometrium, which results in the individual undergoing the process of menstruation.
Therefore, we can confirm that the degeneration of the corpus luteum results in a drop in progesterone production.
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List 2 objects that look like tightly coiled strands of DNA?
Chromosomes and linkage groups are 2 fragments of DNA ordered in decreasing size that represent tightly coiled strands of DNA.
What is DNA?Deoxyribonucleic acid (DNA) is the genetic material that all organism uses to transmit hereditary characteristics.
DNA is a double helix molecule composed of two long chains of nucleotides linked via hydrogen bonds.
In eukaryotic cells, DNA is associated with histone proteins, which make it a tightly coiled molecule.
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_____is the application of force to move something closer. *
1 point
A. push
B. pull
C. a push and a pull
D. All of the above
Explanation:
push is the application of force to move something closer..
Point, . push ,a push and a pull is the application of force to move something closer.
Option (D) is correct.
When you apply force to move an object, there are generally two ways to do it: pushing or pulling.
1. Pushing: This is when you exert force on an object away from you, causing it to move in the direction of the force. For example, if you push a chair forward, you apply force in the direction away from you, making the chair move forward.
2. Pulling: This is when you exert force on an object towards you, causing it to move in the direction of the force. For instance, if you pull a door towards you, you apply force in the direction towards you, making the door move inwards.
So, the application of force to move something closer can involve either pushing or pulling. Therefore, the correct answer is "All of the above" (D), as both A (push) and B (pull) are correct ways of applying force to move something closer.
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What are some structural similarities between the bird wing and frog arm? (Struggling with an assignment haha)
Answer:
The wing of a bird and the arm of a human are examples of c. homologous structures. This is because they are structures which have a similar
1. The process by which one type of bacteria is
changed into another type is called
a. transcription.
b. transformation.
c. duplication
d. replication.
Answer:
d
Explanation:
mark me as brainlest pleaseeeeeeeee!
Once the dna at the replication fork is unwound by helicases, what prevents the two strands from coming back together to re-form a double helix?.
The model shows what happens to chromosomes during a certain part of the cell cycle
A.Metaphase
B.Interphase
C.Telophase
D.Anaphase
What is one part of the DNA molecule that changes?
In the peripheral nervous system, schwann cells participate in the repair of damaged nerves by:.
Schwann cells participate in the repair of damaged nerves by forming a cellular tube that can direct the growth of new axons.
What is Schwann cell?They are referred to as the myelinating cell of the peripheral nervous system and support cells of peripheral neurons.
They participate in nerve cell repair by the formation of a tube that can direct the growth of new axons.
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Which tissue protects the organs? A. Muscle b.connective. C.nerve. D.epithelia
Answer:
B. connective tissue
Explanation:
they act as a sorta framework for the organs, protecting them from moving around too much and also separates them from one another
Help me with this bs packet thing
4. scientists are studying photosynthesis in a forest ecosystem that has plants, animals, and decomposers (which consume dead things). which group or groups of organisms in the forest carry out photosynthesis?
Answer: Plants, animals, and decomposers (which consume dead things) are in a forest ecosystem. Scientists are studying photosynthesis in the forest. Which group or groups of organisms should they study? A jungle ecosystem has plants, animals, and decomposers (which consume dead things).
Explanation:
When does a zygote become an embryo?
once the embryo forms a heart, lungs, and brain
a few minutes after the male and female gamete fuse
once the zygote enters a safe environment either inside or outside of their mother
once the zygote starts dividing by mitosis and cell differentiation occurs
Answer:
Explanation:
The transformation of a zygote into an embryo adheres both to nature and to nurture: not only genetics but also environment determines the outcome. This idea has assumed many forms. A territory in the early sea urchin blastula contains clones of founder cells, and each clone contributes exclusively to one territory (Cameron & Davidson, 1991). Both the lineage of a founder cell, i.e. its nature, and the position of a founder cell, which determines how it is nurtured, contribute to its fate. Fertilisation, the topic of the first Forum, fixes the genes; interblastomere communication, the topic here, regulates gene expression. Blastomeres communicate like any other cell – via ligand-receptor interactions and through gap junctions. Saxe and DeHaan review these mechanisms. The definition of ligands and receptors becomes broadened in this context, and cell adhesions as well as gap junctions enter into the story. In spite of these entanglements, it appears that nature uses the same sorts of mechanisms to get cells to specialise that she uses to keep them talking. Thus, neurons and glial cells signal to one another via glutamate receptors and gap junctions (Nedergaard, 1994). Likewise, we expect neurotransmitters (and neurotransmitter transporters) to help signal differentiation. The biophysicist may ask whether electrical properties also play a role, but that we reserve for another Forum. If gap junctions figure in development as fusion pores that pass small molecules and electrical signals between blastomeres, another parallel suggests itself. Brian Dale asked in the first Forum: How does a spermatozoon activate an oocyte? This question, which concerns gamete communication, has produced two schools of thought and remains controversial (Shilling et al., 1994). Do sperm activate oocytes via contact-mediated mechanisms or through fusionmediated mechanisms? Or do both mechanisms occur, as they appear to in development?
PLEASE HELP!
Why is nuclear fusion currently not feasible as a source of electrical energy?
Answer:
Fusion is generally impossible because the strongly repellent electrostatic forces between the positively charged nuclei prevent them from colliding and fusing. One of the key reasons we haven't been able to realize the promise of fusion is because its energy requirements are outrageously large. High-energy neutrons are produced during fusion reactions, although they are not radioactive in and of themselves. They do, however, have such a strong influence on the reactor's walls.
To date, most of our natural antibiotics have been found to be produced by members of what genus?.
Answer:
streptomyces
Explanation:
Answer:
yes it's natural
Explanation:
100% natural to the century we are now so yeah
Cancer is when cells multiply at an uncontrolled rate. These cells then group together to form a mass (tumor). The cells within a tumor are much smaller than normal cells would be.
Based on this information which phase of the cell cycle is not functioning properly? Support your answer with evidence from the model/explanations.
Answer:
Mitosis
Explanation:
When Mitosis is not regulated then cell division is not regulated.
An estuary?
A. is only found inland.
B. filters dirt and pollution out of the water.
C. is a deposit formed where a fast-flowing stream flattens?
D. is a small watershed.
Answer:
b. filters dirt and pollution out of the water
Explanation:
just answered the question :)
How could harm to one resource among the commons listed in part b cause harm in another part of the environment?
Answer:
Take a picture of what the problem is, because your question isn't clear
Explanation:
Not using complete sentences
For example, overfishing can harm fish populations, leading to imbalances in the food chain and harm to other species.
What are commons?The commons, as a concept, refers to shared resources that are available to all members of a community or society. These resources can include things like air, water, land, and wildlife. When harm is caused to one of these resources, it can have a cascading effect on other parts of the environment.
For example, if pollution from a factory contaminates a river, it can harm the fish and other aquatic life that live in the river. This, in turn, can impact the local ecosystem and reduce the biodiversity of the area. The contaminated water may also be used for agriculture, leading to contaminated crops and potentially harming human health.
Similarly, deforestation can lead to soil erosion, which can cause sedimentation in rivers and harm aquatic life. It can also contribute to climate change by reducing the amount of carbon that is absorbed by trees and released back into the atmosphere.
In summary, harm to one resource among the commons can have far-reaching effects on other parts of the environment, highlighting the importance of managing these resources sustainably.
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Please help, I’ll mark your answer as brainliest.
pls help ill give brainlliest and 5 stars
Answer:
hot melted rock that flows on the earth's surface is lava
hot melted rock under earth's surface is magma
matter that settles at the bottom of a liquid is sediment
the process of settling or being deposited as sediment is sedimentation
:)
Explanation:
What is the process by which organisms
keep internal conditions stable?
so,the process by which organism maintain a relatively stable internal environment
,is homeotasisOrganism that can be found in your locality
Answer:
earthworm
Explanation:
Simply earthworm are found in under the grass
earthworm helps in making soil fertilize
1. What function do spindles perform during mitosis?
2. What function do centrioles perform in animal cell mitosis?
