Answer:
Phytoplankton are the foundation of ocean life, providing the energy that supports nearly all marine species.
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Explanation:
Read this passage about CFTR mutations. Then, using your knowledge of cells, select the section that describes mutations that occur at the ribosome.
The CFTR gene was first discovered in 1989, but as with many research endeavors, that was only the first step. Since that first discovery, scientists have identified 1,700 mutations of the CFTR gene. These various mutations are classified according to their specific effect on the CFTR protein. Some mutations interfere with the protein assembly process. These are called protein production mutations and result in construction of incomplete or unstable proteins. Once built, the CFTR protein folds itself into a stable three-dimensional tube shape and travels to the cell membrane where it inserts itself as a channel between the cell’s interior and its surface. Mutations that affect this part of the process are called protein processing mutations. Each channel has a gate that opens and closes in response to chemical signals. Gating mutations cause misinterpretation of those chemical signals. Conduction mutations change the inside of the tunnel, making passage through the channel slower and more difficult.
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The waters that wash up on an ocean sea shore increase in temperature by almost 20° C over a period of 5000 years which describes a possible adaptive change in the invertebrates that live in tide pools there?
A). Some animals will adapt by migrating over land to colder areas
B). Those animals with adaptations that favor warmer water will mate and reproduce in greater numbers
C). Those animals that have adaptations that favor cold water will mate and reproduce in greater numbers
D). Old adaptations will spring up again from genetic reserves
Answer: I remember this when I was in grade 5 the answer is A
now I'm in college
19. Which of the following sequences is correct to initiate
inspiration?
(i) The contraction of external intercostal muscles raises the ribs and sternum
(ii) Volume of thorax increases in the dorso-ventral axis
(iii) Intrapulmonary pressure decreases
(iv) Diaphragm contraction
(v) Air rushes into lungs
(vi) Volume of thorax increases in the anterior-posterior axis
Choose options :-
(a) (i), (ii), (iv), (v), (iii), (vi)
(b) (i), (ii), (iii), (iv), (vi), (v)
(c) (i), (ii), (iv), (vi), (ii), (v)
(d) (vi), (v), (i), (ii), (iii), (iv)
Answer:
Hello There!!
Explanation:
I believe the answer is (c) (i), (ii), (iv), (vi), (ii), (v).
hope this helps,have a great day!!
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Where does Streptococcus store its genetic information?
The DNA of most bacteria is contained in a single circular molecule, called the bacterial chromosome. The chromosome, along with several proteins and RNA molecules, forms an irregularly shaped structure called the nucleoid. This sits in the cytoplasm of the bacterial cell
Answer: Bacterial chromosome
Explanation:
A scientist wanted to investigate whether light is required for the germination
of seeds. She filled two plant pots of the same size with equal amounts of
soil.
Pot 1 was labelled 'LIGHT and Pot 2 'DARK'. Five lettuce seeds were planted
in each of the pots. Both plants were given sufficient water.
Pot 1 was put in direct sunlight. A cardboard box was placed over Pot 2
and no light was allowed to enter.
21.1
Write down a hypothesis for the investigation.
Pleas
it reserved
Answer:
The correct hypothesis would be -
"if the light is required for seed germination of seed, then in the absence of light lettuce seed will not germinate"
Explanation:
The hypothesis is always based on a question one wanted to answer. The hypothesis is the possible explanation of a world natural problem. One needs to make his hypothesis on the basis of the research he made.
To test the hypothesis one needs to develop an experiment like here formed an experiment to test if the light is required for the germination of seeds. Thus, hypothesis would be "if the light is required for seed germination of seed, then in the absence of light lettuce seed will not germinate"
When a cell gains water, what happens to its size and weight
Answer: Water will move across the semi-permeable membrane in order to balance both sides until they are neutral.
"Osmosis is the net movement of water across a selectively permeable membrane driven by a difference in solute concentrations on the two sides of the membrane. A selectively permeable membrane is one that allows unrestricted passage of water, but not solute molecules or ions."
Or
When a cell gains water it becomes much bigger and heavier which could possibly lead to its explosion.
"Water moving into a cell can make the cell swell, or even burst! This happens when cells are placed into a hypotonic solution. Like the egg in distilled (pure) water. Water leaving a cell can make it shrivel up"
Answer:
When a cell gains water, the size will expand, making the cell bigger, and the weight will increase, depending on the type of cell as well as the amount of water.
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i will mark u as brilliant
Given below are a few activities carried out by agricultural farming.
1. Adding fertilizer or manure to the soil.
2. Removing the husk to feed cattle.
3. Removing weeds from the field
Which of the above helps to increase the amount of nutrients available to the crop plant?
A) Only 1 b) Only1 and 2
c) Only 1 and 3 d) All: 1, 2. And 3
Answer:
Adding fertilizer or manure to the soil.
Explanation:
This is because fertilizer or manure are formulated substance that contain different nutrients which when applied to the soil will add nutrients to the soil and make nutrients available for plants absorbing and these nutrients absorbed will help improve yield. They contain nutrients that help boost plants growth.
Why does glucose more soluble in water comparing to benzoic acid?
Thanks :)
Answer:
because it dissolves in water very well
Explanation:
Bony Fish (bass etc.) and marine mammals (like dolphins) evolved some similar adaptations for survival in aquatic environments. However, they evolved separately and are not closely related evolutionarily. What type of evolution does this represent?
Answer:
Convergent evolution
Explanation:
Convergent evolution is a type of evolution of similar features and/or structures between organisms that are not phylogenetically related. This type of evolution is known to create analogous structures/organs that exhibit similar or the same functions but were not present in the last common ancestor of these taxa. An example of analogous structures (and therefore also of convergent evolution) are the wings of bats and of insects (e.g., butterflies). Conversely, divergent evolution is a type of evolution where species phylogenetically related, i.e., species that share a common ancestor, evolve and accumulate differences over time.
You have identified a new, recessively inherited trait in dogs: floppy ears. To determine if the gene for Floppy Ears is X-linked or not, you should:
Answer:
Cross a non-floppy-eared male to a floppy-eared female and observe if males offspring have the floppy ear trait
Explanation:
Mammals (e.g. dogs) have two sex chromosomes: X and Y. In the XY sex-determination system, the female gamete (i.e., the ovum) contributes to an X chromosome, while the male gamete (i.e., the sperm) contributes either an X chromosome or a Y chromosome: normal females are XX and normal males are XY. In consequence, a male always inherits its X chromosome from the mother and its Y chromosome from the father. In this case, the presence of the floppy ear trait in all males F1 offspring obtained by crossing a non-floppy-eared male to a floppy-eared female indicates that this trait is linked to the X chromosome because males inherit the floppy ear trait from the mother.
Mitosis is the process through which a cell replicates its DNA and produces two identical daughter cells. If a cell undergoing mitosis is currently in anaphase as shown in the diagram below,
The duplicated genetic information found in a parent cell's nucleus is divided into two identical daughter cells during the fourth stage of mitosis, referred to as anaphase. Thus, option B is correct.
What mitosis process through which cell replicates its DNA?The sister chromatids are able to separate because the protein “glue” holding them together is degraded. Each chromosome now exists on its own. The opposing ends of the cell are drawn to the chromosomal pairs in each pair.
The replication fork is connected to a number of proteins that aid in the The way DNA polymerase creates new strands is mostly by include nucleotides that complete each (template) strand. The S-stage of interphase is when DNA replication happens.
Therefore, Sister chromatids split from one another and are drawn to the opposite ends of the cell during anaphase.
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True or False? Rainwater from storms can cause erosion as soil is washed away from hillsides.
most likley true?
im not sure but imma go with true
1c) If the amino acid sequences in the proteins of 2 organisms are similar, why will their DNA also be similar?
Answer and Explanation:
Because the DNA sequence determines a protein's amino acid sequence, a gene shared by two closely related organisms should have similar, or even identical, amino acid sequences. That's because closely related species most likely diverged from one another fairly recently in the evolutionary span. Thus, they haven't had as much time to accumulate random mutations in their genetic codes.
Which of the following is believed to be common among all mass extinction events?(1 point)
a significant change in the global climate
the type of species that went extinct
the type of event that causes the extinction
the number of species that went extinct
Answer:
D the type of event that causes the extinction
The correct answer is a significant change in the global climate, as due to this is believed to be common among all mass extinction events.
Climate extrude interacts with threats which include habitat loss and overharvesting to similarly exacerbate species declines. The decline of species and ecosystems can then boost up weather extrude, growing a remarks loop that similarly exacerbates the situation.
What is global mass extinction?The mass extinction is an end result of human activity, pushed through populace boom and overconsumption of the earth's herbal resources. The 2019 international biodiversity evaluation through IPBES asserts that out of an expected eight million species, 1 million plant and animal species are presently threatened with extinction.
Therefore it is clear that a significant change in the global climate is believed to be common among all mass extinction events.
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3.1
Suggest which leaf carries out more photosynthesis and explain why.
Explanation:
Leaf that are really green, because they contain Lots of chlorophyll in the chloroplast which is the main site for photosynthesis
What genetic and other changes might have caused these cells to escape normal cell cycle regulation these cells are hela cancer cells
Answer:
Cancer cells such as Hela cells escape to normal cell cycle by mutations that lead to the misexpression and/or overexpression of regulatory molecules (e.g., cyclins and cyclin-dependent kinases) and faulty checkpoint control of the cell cycle
Explanation:
The term cell cycle refers to the mechanism of DNA replication and cell division, which involves a series of sequential steps. The control of the cell cycle depends on 1-cyclins and cyclin-dependent kinases (CDKs) that regulate the cell cycle by a cascade of protein phosphorylations and 2- a group of checkpoint controls that monitor the completion of critical cellular events. HeLa is an immortalized cell line derived from cervical cancer cells. These cells (HeLa) contain 76 to 80 total chromosomes (instead of the 46 chromosomes that contain normal-diploid body cells), some of which are heavily mutated. These mutations can affect CDKs that control the cell cycle as well as checkpoint-control mechanisms (for example, those resulting from DNA damage), thereby cells do not enter programmed cell death (apoptosis) and proliferate uncontrollably.
¿ que sustancias produce energía por combustión ?
Answer:
En la combustión completa se produce: vapor de agua, dióxido de carbono y energía calórica. En cambio, si la combustión es incompleta, se produce monóxido de carbono.
suggest why a glass tank with water was placed
Answer:
The two layers of glass provides protection from the heat of the lamp, and the water level moves down rapidly as the gas is collected.
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A vaccine used against an infectious disease may contain??
Answer:
antigens
Explanation:
a vaccine may contain that
Strong contrasts in texture have what effect on a monochromatic design?
Answer:
It prevents monotony
Explanation:
Strong contrasts in texture have a primary effect on monochromatic design by ensuring it’s more eye catching and not too plain.
Contrasts is a term used to describe the display of an objects dissimilar sides. A monochromatic light is known to have just one color and the strong contrasting texture however makes it possible for it to have different color differences thereby preventing monotony.
names of five natural things from the word grid given below
AS T R PILM
o w LS PR P 0
RO AM
MS O LILIN
ART OTWAN
MIT
THE
IN
0
01
OTA NIMA
NA 0 OM
Q
RIO
R
LISI N
Answer:
AIR
SEA
ANIMAL
PLANT
MONTH
Explanation:
These are the least I could get
What are the parts of an operon?
Answer:
An operon consists of an operator, promoter, regulator, and structural genes. The regulator gene codes for a repressor protein that binds to the operator, obstructing the promoter of the structural genes. The regulator does not have to be adjacent to other genes in the operon.
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Answer:
An operon consists of an operator, promoter, regulator, and structural genes.
Explanation:
Promoter – a nucleotide sequence that enables a gene to be transcribed. The promoter is recognized by RNA polymerase, which then initiates transcription. Operator – a segment of DNA to which a repressor binds.
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A. Somalia B. Kenya C. Spain D. Nigeria
Answer:
Somalia
Explanation:
while looking at a graph, you notice a period of time where the line is perfectly horizontal what is most likely taking place during this time period
Answer:
The correct answer would be - the y-axis variable is constant.
Explanation:
In a normal line graph, there are generally two variables on two different axis one is at the x-axis and the other is on the y-axis that represents the correlation between these two variables. If there is a change in the variable present on the x-axis the change on the variable on the y-axis establishes the relationship among these variables.
If there is a period on the graph where the line is completely horizontal it means the variable present on Y-axis has no change during this period or is constant. Suppose a graph is plotted between speed or velocity on the Y-axis. A perfectly horizontal line on this graph means that speed is not changing over time and remain at te same speed.
how many chromosomes in the dna?
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What is a trophic level?
a group of organisms that can convert one form of energy into another form
the total amount of energy that is present in an ecosystem
an organism's environment, as well as physical factors that make up that environment
a living organism's position in the flow of energy through an ecosystem
Answer:
A living organism's position in the flow of energy through an ecosystem.
How can you tell from a food web which organisms will have the greatest biomass?
Answer:
How can you tell from a food web which organisms will have the greatest biomass?
The tropic level contains the greatest biomass in most ecosystems is producers. This occurs because producers get their energy from the sun, the sun is the most available resource, so there are the most at that level.
Explanation:
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1. Catalytic converters reduce which of the following pairs of pollutants in car exhaust? a.)Carbon dioxide and ozone
b.)Carbon monoxide and hydrocarbons
c.)Carbon dioxide and particulates
d.) Lead and mercury
e.)Methane and particulates
Answer: B
Explanation: By most estimates, catalytic converters fitted inside the exhaust pipe of a gasoline-operated car convert over 90% of hydrocarbons (HC), carbon monoxide (CO) and nitrogen oxides (NOx) from the engine into less harmful carbon dioxide (CO2), nitrogen and water vapour.
The catalytic converter used in the exhaust of the cars reduces carbon mono oxide and hydrocarbons.
What is a catalytic converter?The catalytic converters are the devices used in the exhaust of the vehicles run on petrol and diesel.
They convert the harmful toxic gases into the less harmful pollutants by a redox reaction.
By most estimates, catalytic converters fitted inside the exhaust pipe of a gasoline-operated car convert over 90% of hydrocarbons (HC).
carbon monoxide (CO) and nitrogen oxides (NOx) from the engine into less harmful carbon dioxide (CO2), nitrogen, and water vapor.
Thus the catalytic converter used in the exhaust of the cars reduces carbon mono oxide and hydrocarbons.
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Unlike many plants, the stomata of the water lilies are found on the upper surface of the leaves. Suggest a possible reason for this adaptation.
Answer:
All plants need stomata on the surfaces of their leaves for photosynthesis. ... The stomata of water lilies are on the upper surface of their leaves, maximizing air exposure. Stomata on the underside of the leaves would be wasteful because water contact interferes with the exchange of carbon dioxide and oxygen.
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Answer:
Because the upper surface of the water lillies are not immersed in water.
Explanation:
Since the stomata is an opening for water to be excreted, the water lillies (which are usually found in water) need a surface which is not in contact with water so as the release the water as a metabolic waste. And since the lower surface of the water lilly's surface is immersed in water, there will be no point to excrete the water.
Word Bank: brain, instincts, interpreted, organs, reflexes, spinal cord, senses Notes
The central nervous system includes the _______ and _______.
Signals from _______ and the body's _______ are received by the brain and the spinal cord.
Once signals are processed and _______ by the central nervous system, a response is sent back to the body.
A central nervous system is also responsible for programming _______ and _______.
Answer:
The central nervous system includes the nerves and pressure points
Signals from and the body's movements are received by the brain and the spinal cord.
Once signals are processed and _______ by the central nervous system, a response is sent back to the body.
A central nervous system is also responsible for programming _______ and _______.
Explanation: