Answer:
Whether you are a newly certified diver (if so, we offer our congratulations) or an old salt (good for you, too), odds are you are familiar with the animals known as echinoderms.The feet hold tight to the bottom as muscles within the feet contract, enabling the animal to propel itself. Repeating this process allows echinoderms to travel in a fashion that is “more turtle than hare.”One of the most remarkable traits about echinoderms is their ability to regenerate body parts that have been lost. Many tropical destinations have learned this lesson the hard way. A sea star known as the wnwn of thorns readily preys upon living corals, and a crown of thorns invasion poses a serious, but usually temporary threat, to coral reef ecosystems. A few decades ago, when crown of thorns showed up in big numbers, resort owners asked local divers to go into the water and chop them up. Bad idea. Like many sea stars and brittle stars, crown of thorns not only regenerated lost parts, but in some instances the lost part often regenerated an entirely new animal. The not-surprising lesson here, “Don’t mess around with Mother Nature.” The ability to regenerate is an important part of the survival strategy of many species as they readily sacrifice body parts to escape predation.Sexes are separate in most echinoderms, but they look very similar and distinguishing male from female is a task best left to specialists. Reproduction is most often achieved by spawning as males and females simultaneously release sperm and eggs into the water column where sexual union occurs. The resulting larval life-forms spend from a few days to a few weeks as part of the community of plankton before settling down to live their adult lives on the sea floor.
Which statement about protein hormone synthesis is FALSE. First exclude the four statements that are true. Which statement about protein hormone synthesis is FALSE. First exclude the four statements that are true. The RNA used for protein hormone synthesis is a copy of the gene for the protein hormone. Protein hormones are synthesized on free ribosomes. The cell invests energy to move protein hormones through the cell. Protein hormones are packaged into vesicles for movement through the cell. Protein hormones often travel through the bloodstream in order to reach a target cell.
Answer:
The correct answer is - Protein hormones are synthesized on free ribosomes (false).
Explanation:
The majority of the hormones that are produced from endocrine glands are produced are steroids however some of the hormones are made up of peptide or proteins.
Protein hormone synthesis uses RNA, is a copy of the gene for this hormone, this is packaged into vesicles with the help of ER and Golgi bodies for movement through the cell and reaches to its target cell by traveling through the bloodstream. mRNA is transcribed from DNA in order to produce protein. These hormones are produced according to the mRNA coding from amino acids in the cell.
When the human body is subjected to prolonged starvation, cells use up all available glucose first, including glucose bound up in glycogen. When all glucose has been depleted, cells use lipids as a fuel source, and when lipids have been depleted, cells use proteins as a fuel source. Throughout these shifts to new fuel sources, the enzymes of glycolysis and the citric acid cycle remain present and active in the cells. Which statement explains the constancy of these enzymes under conditions of starvation?
The options are missing from the question. They are;
a. These enzymes are inhibited but not destroyed under conditions
of starvation since destroying them would require energy input.
b. These enzymes continue to be needed since catabolism of lipids
and proteins leads to intermediates that are oxidized through
these pathways.
c. Once enzymes are produced in a cell, they continue to function
for as long as the cell lives even if they are not used.
d. All catabolic enzymes are expressed when energy levels are low
in a cell, including enzymes that cannot oxidize the fuel
molecules that are available.
e. The cell continues to produce these enzymes in case glucose or
other carbohydrates become available again.
The correct answer to the question is option B
THESE ENZYMES CONTINUE TO BE NEEDED SINCE CATABOLISM OF LIPIDS AND PROTEINS LEADS TO INTERMEDIATES THAT ARE OXIFIZED THROUGH THESE PATHWAYS.
The enzymes involved in glycolysis are; hexokinase, phosphofructokinase, and pyruvate kinase.
The cell use Amino acids as energy source through the conversion of the amino acids that enter glycolysis or the citric cycle that are eventually catabolized to CO2 at various points through the help of their enzymes (fumarase) or (fumarase hydratase) speeding up the rate of the reaction.(pyrimidines).
Help PLEASE
and don't even think about deleting this questions you moderators this is a HOMEWOrK question that is being GRADED AS A TEST because of the difficulty and time consumption of it I've already had scuffles with 4 moderators now and would appreciate if I don't have another
Answer:
A. A= or RNA, B= cell fuel and support, C= galactose and glycogen,
D= nucleic acids and fatty acids.DNA
Which statement describes how diffusion works?
Molecules always move from inside of the cell to outside of the cell.
Molecules always move from areas of high concentration to low concentration.
Molecules always move from areas of low concentration to high concentration.
Molecules always move from of outside the cell to inside of the cell.
Answer:
Molecules always move from inside of the cell to outside if the cell
Answer:
Molecules always move from areas of high concentration to low concentration.
Explanation:
True or false aerobic respiration produces more atp than anaerobic respiration
transgenic plants are plants having?
a)no gene
b)Genes in transposition
c)Genes with no function to perform
d)Genes of another organism
Help ASAP! 10 points and brainy .
Answer:
Erosion
Explanation:
When Soil is moved from the normal ground into water is called erosion, it can be caused by a lot of different things. (but thats a whole different topic)
Hope this helped :)
Answer:erosion
Explanation:
In tomato plants, the production of red fruit color is under the control of an allele RR. Yellow tomatoes are rrrr. The dominant phenotype for fruit shape is under the control of an allele TT, which produces two lobes. Multilobed fruit, the recessive phenotype, have the genotype tttt. Two different crosses are made between parental plants of unknown genotype and phenotype. Use the progeny phenotype ratios to determine the genotypes and phenotypes of each parent.
Cross 1 progency 3/8 two-lobed, red
3/8 two-lobed, yellow
1/8 multilobed, yellow
Cross 2 progency 1/4 two-lobed , red
1/4 two-lobed, yellow
1/4 multirobed red
1/4 multilobed yellow
Answer and Explanation:
Due to technical problems, you will find the correct answer and complete explanation in the attached file
write a short note on the process of photosynthesis
Answer:
Explanation:
Plants take in sunlight and water; and then turn them into sugars, which are food for the plant.
Answer: The process by which plants and some microorganisms make substances like carbohydrates. It is an endothermic (takes in heat) chemical process that uses sunlight to turn carbon dioxide into sugars.
Explanation:
Plants roots create holes and tunnels in the soil allowing infiltrations to happen more easily. However, if trees and plants are stripped way, the soil can become dry. What process will increase if trees and plants are absent in the area?
Answer:
This question lacks options, but it can be answered based on general knowledge. The answer is SOIL EROSION
Explanation:
Soil erosion is a process whereby the top layer of the soil gets washed away by certain agents including water (from excessive rainfall) and wind etc. According to this question, plants roots create holes and tunnels in the soil allowing infiltrations to happen more easily. This means that the presence of plants in a soil makes the soil permeable to water and air.
However, in the absence of any plant form on a soil; the soil become exposed directly to this agents, becomes less infiltrable due to low penetration by roots, becomes less compact and held together etc. All these occurrences promotes the process of SOIL EROSION to occur on such a soil more.
Why is soil important?
What is soil erosion?
What human activities are responsible for soil erosion happening at advanced rates?
What are some of the effects of soil loss?
What can be done to prevent soil erosion?
Answer:
It helps in growing of plants
it is the carrying away of soil by water wind or glaciers
Overstocking the cattle
Infertility
By planting grass
Answer:
Why is soil important?
It is important because it distributes plant species and gives a habitat for a lot of organisms.
What is soil erosion?
Soil erosion is where the topsoil wears off by natural physics of water, wind, and ice. Some nutrients and materials are lost in the process.
What human activities are responsible for soil erosion happening at advanced rates?
Ploughing, unsuitable agricultural practices like using a till to plant things, combined with deforestation and overgrazing.
What are some of the effects of soil loss?
Your dirt might not be fertile anymore, clogged waterways, or an increase in pollution.
What can be done to prevent soil erosion?
To help prevent soil erosion we can use no till or mulch till. We could plant grasses, grains, or legume to help prevent soil erosion.
Explanation:
your welcome.
A scientific theory is NOT an educated guess.
True
False
Answer:
True
Explanation:
A scientific theory is NOT an educated guess as a scientific theory is a well-tested, broad explanation of a natural phenomenon. A theory in science is based on experimentation and research.
34. Which of these changes to the cell would cause the greatest reduction in the
activity of catalase?
A decrease in the concentration of hydrogen and oxygen
An increase in the concentration of hydrogen peroxide
An increase or decrease in pH beyond normal range
A return of pH to the normal range
Answer:
an increase in the concentration of hydrogen peroxide
Explanation:
Natalie is class reread Shakespeare’s Romeo and Juliet last semester and took a field trip to see it live in community theater. today Natalie or warrant that her class I’ll read another work for Shakespeare this semester
What is the best prediction she can make about this semester‘s text?
It’s a play
It’s an adventure
It is a fairytale
It is a fable
Answer:
itz a play?
Explanation:sory if im wrong TwT
Answer:
its a play
Explanation:
i just took the test
Describe a living system that is not an organ system or an ecosystem.
Answer:
fungi
Explanation:
How does the life process of a prokaryotic cell differ from a eukaryotic cell?
Answer:
There are several differences between the two, but the biggest distinction between them is that eukaryotic cells have a distinct nucleus containing the cell's genetic material, while prokaryotic cells don't have a nucleus and have free-floating genetic material instead.Jul 11, 2019
Explanation:
There are several differences between the two, but the biggest distinction between them is that eukaryotic cells have a distinct nucleus containing the cell's genetic material, while prokaryotic cells don't have a nucleus and have free-floating genetic material instead.Jul 11, 2019
Answer: A prokaryotic cell has no nucleus, while a eukaryotic cell does. What that means is that since a prokaryotic cell has no nucleus, it significantly differs itself from a eukaryotic cell. The nucleus in the eukaryotic cell stores the Gene's, DNA, and information about the cell, while a prokaryotic cell has genetic material floating around in it. This is the main differentiator of the two, however there are other ones.
Explanation: I hope this information helps you!!!
what is the average temperature on uranus for day and night?
Answer:
The coldest temp is -353 the warmest it gets is -371
Explanation:
Which property of a rock determines its color?
its grain size
its method of formation
its mineral composition
its coarse-grain content
property of a rock determines its color , is its method of formation
what are the types of rocks ?Metamorphic rocks are always begin as another type of rock which involves the transformation of existing rocks that is igneous or sedimentary rock.
These are either formed by either excessive heat and pressure, or through the chemical activity of fluids.
sedimentary rocks or clastic sedimentary rocks are composed of rock pieces that have been battered from already existing rocks.
It is the grain of sediments which stick and combine to ultimately form the rock and the size of the grain determines the energy of sedimentary transport
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Which choice has eukaryotic animal cells? Lactobacillus virus liver oak
Answer:
Probably the Liver.
Explanation:
Answer: Its Liver! obviously!
Explanation: well, i dont have an explanation but it should help!
everything lol I need help on mi life
Don’t worry, everything is gonna be fine :)
2 organelles that work together to maintain homeostasis
Answer:
mitochondria and ribosome
Explanation:
They botch create energy and work together for the body to able to maintain homeostatic. HOPE THIS HELPED
Acid-water solutions taste _[blank 1] . Acids react with _[blank 2]_ to produce salts and water.
Which option correctly fills the blanks in the passage?
O bitter; metals
O sour; bases
O sour, oxygen
O bitter; bases
Answer:
Sour; bases
Explanation:
I did the quiz, and this was the correct answer for mine.
species with broad niches
Answer:
opossums and bison
Explanation:
Answer:
opossums and bison
Explanation:
The genetic code is _______________because more than one codon codes for the same amino acid.
Answer:
Degenerate
Explanation:
The genetic code is degenerate because there are more than one codon code for the same amino acid.
If a solution has a pH of 7, it is said to be
Answer:
NeutralExplanation:
A solution with a pH of 1 to 6 is acidic
A solution with a pH of 8 to 14 is alkaline .
. Pepper colors range from bright red, orange, and yellow shades, to dark green and brown shades. Coloration in bell peppers is controlled by alleles for two genes: Red (R) is incompletely dominant to yellow (r) and No chlorophyll (G), no green pigment, is dominant to chlorophyll (g), green pigment. A. You cross a red pepper with a green pepper and all the F1 progeny are orange. 1 pt What are the genotypes of the red and green parents? What is the genotype of the F1’s? B. What genotypes and phenotypes, in what proportions, do you expect in the F2 progeny of the orange F1 peppers? 2 extra credit points
Answer:
All crosses and proportions, genotypes and phenotypes are attached.
Explanation:
a. Within living organisms, staining is a characteristic governed by a polygenic inheritance, which means that there is more than one gene involved in the staining process. as you already know, each gene has two alleles, if a trait is controlled by 2 genes, it means that we will have 4 alleles at the crosses.
From the description between dominance and recessivity between the alleles that control the colors of the pepper, shown in the question above, we can see that for the crossing between a red pepper and a green pepper, being able to generate a completely orange offspring, it would be necessary that the genotype of the parent peppers was: Red: RGRG, green: rgrg.
This would generate an orange-colored RrGg offspring, as you can see at the F1 crossing.
b. When individuals of F1 offspring are crossed, the combination of alleles and the determination of genotypes and phenotypes becomes much more complex, because instead of 4 alleles, we will have the combination of 16 alleles among themselves. Once again we will need to rely on the description of dominance and recessivity shown in the question above, so that from the crossing between the alleles of each gene, we can reach a conclusion, as you can see in the F2 crossing.
Answer:
is
Explanation:
vnbmbyi iiigujjg khm,,boul ghjggg
A. Urganelles of the endomembrane system
The various parts of the endomembrane system serve different functions in the cell. In this activity, you will identify the roles of each part of the endomembrane system. Drag each function to the appropriate bin.
a. protein synthesis
b. protein modification and sorting
c. macromolecule digestion
d. lipid synthesis
e. autophagy
f. cisternal maturation
g. calcium ion storage
h. poison detoxification
1. Smooth ER
2. Rough ER
3. Golgi apparatus
4. Lysosomes
B. Sites of protein synthesis
All proteins are synthesized by ribosomes in the cell. Some ribosomes float freely in the cytosol, while others are bound to the surface of the endoplasmic reticulum. Most proteins made by free ribosomes function in the cytosol. Proteins made by bound ribosomes either function within the endomembrane system or pass through it and are secreted from the cell. Which of the following proteins are synthesized by bound ribosomes?
A. Lysosomal enzyme
B. Insulin
C. ER protein
D. DNA polymerase
E. Ribosomal protein
C. Pulse-chase experiments and protein location
Scientists can track the movement of proteins through the endomembrane system using an approach known as a pulse-chase experiment. This experiment involves
the "pulse" phase: Cells are exposed to a high concentration of a radioactively labeled amino acid for a short period to tag proteins that are being synthesized.
the "chase" phase: Any unincorporated radioactively labeled amino acids are washed away and large amounts of the same, but unlabeled, amino acid are added.
Only those proteins synthesized during the brief pulse phase are radioactively tagged. These tagged proteins can be tracked through the chase period to determine their location in the cell.
The data below were obtained from a pulse-chase experiment in which cells were examined at different times during the chase period. The numbers represent the radioactivity (measured in counts per minute) recorded at each of the indicated sites. The higher the number, the greater the radioactivity.
Time ER Golgi Cytoplasm Lysosomes Extracellular Space
3 minutes 162 7 21 5 4
20 minutes 73 88 17 10 8
60 minutes 9 35 14 112 13
120 minutes 11 23 18 151 10
Based on these data, what is the most likely function of the cells in this experiment?
a. detoxification
b. muscle contraction
c. phagocytosis
d. secretion
Answer:
A) 1. Smooth ER: d. lipid synthesis, g. calcium storage, h. poison detoxification
2. Rough ER: a. protein synthesis
3. Golgi apparatus: b. protein modification and sorting, f. cisternal maturation
4. Lysosomes: c. macromolecule digestion, e. autophagy
B) A. Lysosomal enzyme; B. Insulin; C. ER protein
C) c. phagocytosis
Explanation:
In eukaryotic cells, the smooth ER (smooth endoplasmic reticulum) is defined as a subset of the endomembrane system of the endoplasmic reticulum responsible for many cellular functions, including the synthesis of lipids and hormones (steroid hormones), the elimination of harmful metabolic compounds and the storage of calcium ions. The Rough ER is a series of connected flattened sacs that bound to the ribosomes and functions during the synthesis of proteins. The Golgi apparatus is another membrane organelle responsible for transporting, modifying, and packaging lipids and proteins. The lysosomes are also membrane organelles that are found in animal cells, these organelles contain digestive hydrolytic enzymes used to break down different types of molecules. Ribosomes are structures formed by both RNA and proteins which are found within all cells. The ribosomes play a major role during the synthesis of proteins, specifically during the translation from messenger RNAs (mRNAs) to proteins. These structures link amino acidic residues to form polypeptide chains. Finally, phagocytosis is a type of endocytosis where the cell engulfs a particle by using its plasma membrane, thereby producing a phagosome.
Describe the energy transformations that occur through plants that you
consume?
Answer:
Explanation:
Photosynthesis is the process plants use to convert energy from the sun into usable energy for their cells. Plants use the light energy of the sun, carbon dioxide, and water to make glucose (a sugar), and oxygen. The energy of the sun is captured and stored in the bonds between atoms in glucose molecules
What is one important role that ocean waters have in heating Earth?
CO
absorb and transport solar energy
transport nutrients and waste
create and emit solar energy
O wear away rock and soil
Answer:
Absorb and transport solar energy
Explanation:
I hope this helps!
One important role that ocean waters have in heating Earth is to absorb and transport solar energy.
What is a ocean?The ocean is a major heat sink for the Earth, meaning it absorbs and stores large amounts of heat from the sun. Sunlight penetrates the surface of the ocean and is absorbed by the water, causing it to warm up. This warm water then circulates through the ocean, carrying heat energy from the equator towards the poles. The ocean's currents also help to distribute heat around the globe, affecting global climate patterns.
Additionally, the ocean plays a crucial role in regulating the temperature of the atmosphere through the process of evaporation. As the sun heats the ocean's surface, water molecules evaporate and rise into the atmosphere. This process releases heat energy into the atmosphere, which helps to warm the air.
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explain how the nitrogen and carbon cycles contribute to the usable supplies of these macromolecules.
