Answer:
Mollusca: Unsegmented exoskeleton, with no appendixes articulated to them. This skeleton has a calcareous origin. Arthropoda: Segmented exoskeleton, with different appendixes articulated to them, which develop different functions. This skeleton has a chitinous origin.Explanation:
Clams are bivalves. Their calcareous exoskeleton has two valves dorsally articulated to each other. They do not articulate with any appendix, although. These animals also have a foot, a small head, and a developed mantle cavity. The valves are convex, oval, and unsegmented. They are composed of three layers: periostracum, prismatic, and pearly. En the dorsal portion of each valve, there is a bulge called the umbo, which is the oldest part of the valve. The articulation has some teeth-shaped structures that are intercalated, maintaining the valves together and fixed. Grasshoppers have a chitinous exoskeleton divided into three principal segments or regions that allow their movement: head, thorax, and abdomen. The head is orientated in such a manner that their feeding apparatus is heading down. Also, the head segment has composed eyes and antennae. The thorax is the medial region of the body. It has three segments: the prothorax, mesothorax, and metathorax. Each of these segments articulates with a pair of legs. Finally, the abdomen is composed of many segments that might reach up to 7 or 11.An individual is heterozygous for a gene at a specific locus. ________ will have the same form of alleles at that locus after S phase.A. Sex chromosomes.B. Homologous chromosomes.C. Non-sister chromatids.D. Sister chromatids.
Answer:
D
Explanation:
Sister chromatids will have the same form of alleles at the locus after S phase.
This is because during the S phae of the cell cycle, sister chromatids are replicated in preparation for cell division. The replication process is quite accurate such that all the alleles present on the initial chromatids are also replicated on the new sister chromatids. Hence, both new and old chromatids will have the same form of alleles at the locus after replication at the S phase. In other words, sister chromatids are exact copy of one another.
The correct option is D.
When does the Mitosis-promoting factor (MPF) Cyclin concentration decline during a typical cell cycle in clam eggs?
A. when the cells grow larger
B. when DNA is synthesized
C. when haploid gametes are produced
D. when the cell nucleus divides
Answer:
D
Explanation:
Answer:
D
When the cell nucleus divides
Explanation:
These are some of the factors that drive ocean currents.
ATides, Water, Gyres, Boats
BFish, Water, Temperature, Waves
CGyres, Temperature, Wind, The Moon
DPeople, Fish, Water, Wind
what cause asexual reproduction
Answer:
It is a type of reproduction that does not involve the fusion of gametes or change in the number of chromosomes.
The offspring that are produced by asexual reproduction from a single cell or from a multicellular organism inherit the genes of that parent and thus have the sane identical identities of the parent.
T/F In passive transport, substances move from areas of low concentration to
areas of high
A.True
B.False
Answer:
false
Explanation:
they move from high to low concentration
Clue 1:
a. DNA is made of nucleotides.
b. Protein is made of amino acids.
c. DNA is located exclusively in the nucleus.
d. Protein is synthesized exclusively in the cytoplasm.
1) What two problems does the transfer of information from DNA to protein need to overcome?
a.
b.
the egg of an animal is most like which part of a plant
Answer:
It is the seed of a plant because both have to break open to start a life. Hope this helps please reward brainlist.
Draw a flow chart that explains how DNA is used to create an organism. please use the words: DNA, gene, protein, cell, tissue, organ, organism.
Answer:
Please find the flowchart attached as an image
Explanation:
DNA is the genetic material contained in the cells of living organisms. The DNA contains a segment called GENE, which contains information used to produce useful products needed in the cell. The information contained in the gene is expressed to produce PROTEINS.
PROTEINS are responsible for many metabolic activities that occurs in a cell. The CELL functions due to activities of the proteins produced by gene expression. When similar cells come together, they form TISSUES. An aggregation of tissues performing similar functions form ORGAN. Organs functioning similarly come together to form ORGAN SYSTEM. A collection of organ systems in the body forms the ORGANISM.
Calculate the force needed to cause a 6 kg bowling ball to accelerate 20 m/s2.
Answer:
Explanation:
F = m * a
m = 6 kg
a = 20 m/s^2
F = 6 * 20
F = 120 N which is short for Newtons.
The largest mass extinction was in the
a. Precambrian time.
b. Cenozoic era.
C. Paleozoic era.
d. Mesozoic era.
Answer:
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- Mesozoic, I just learned about this! it's so sad but it did help our society.
have a great day! hope i could help.
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Explanation:
The largest mass extinction was in the: C. Paleozoic era.
The Paleozoic era is simply referred to as the earliest time of the three (3) geologic eras during the Phanerozoic era.
Generally, there are six (6) geologic periods in the Paleozoic era and they are listed from the youngest to oldest as;
The Permian.The Carboniferous.The Devonian.The Silurian.The Ordovician.The Cambrian.Some of the activities that took place between the start and end of the Paleozoic era time scale include;
I. In the early period of the Paleozoic era (The Cambrian), there were marine living organisms called phyla.
II. During the Paleozoic era, volcanic activities were experienced.
III. The Paleozoic era was prone to erosion and deposition of marine fossils.
IV. Lastly, the Paleozoic era was characterized by the largest mass extinction.
Read more: https://brainly.com/question/6560461
If the same base pairs are used to code for all organisms, why is there so much variation among organisms?
A. The order of the codons differs between organisms
B. The order of the codons is the same between organisms
C. The codons in each organism are the same
D. The codons in each organism differ
Answer:
The correct answer would be, A
The order of the codons differs between organisms.
Explanation:
I took the biology test and got this answer correct.
Please mark brainliest if this helped you!
Answer:
A.)
The order of the codons differs between organisms.
Explanation:
EDGE2021
Which of the following questions would BEST
determine whether a plant is undergoing the
Calvin cycle?
A. Is NADPH being produced?
B. Is oxygen being produced?
C. Is glucose being produced?
D. Is ATP being produced?
Answer:
C
Explanation:
Glucose is the end result of the calvin cycle. It is not Oxygen, NADPH, or ATP because those are produced in the light reactions.
Is glucose being produced? is the question which will best determine
whether a plant is undergoing the Calvin cycle.
The Calvin cycle is known s the light independent or dark reaction which
takes place during the process of photosynthesis by plants. The final
product for this cycle is Glucose.
Other compounds such as NADPH, ATP and oxygen are all formed during
the light dependent reactions which is why asking if glucose is produced is
the most appropriate choice.
Read more on https://brainly.com/question/920840
An operon in E. coli called the Gua operon, encodes proteins responsible for guanine biosynthesis. Two genes, guaA and guaB are under the control of a single promoter and operator, similar to the arrangement in the lac and trp operons. A repressor protein, purR, binds to the operator. In what conditions (high guanine or low guanine) do you suppose this repressor binds to the operator? Do you consider this a "repressible" or "inducible" operon? 3 pts
Answer:
Hight guanine"Repressible" operonExplanation:
An operon is a fragment of DNI with genes that encode for different proteins of metabolic vias. Operons are composed of a regulator gene (that codifies for the repressor), the operator region (that links with the repressor protein), and the promotor sequence (RNA polymerase recognizes the promotor where it begins the RNA synthesis).
The repressor deactivates the expression of a gene when binding the operator of that gene. This binding does not allow the production of mRNA, and hence, proteins that this molecule should synthesize.
This protein has a negative effect on genic expression impeding the transcription of RNA from DNA.
Operons might be inducible or repressible. When the operon is inactive, and a little inductor protein activates it, then the operon is inducible. On the contrary, the repressible operon is the one that is normally active, but the little corepressor protein inactivates it.
During high guanine concentration, the repressor protein must act to regulate the amount of guanine in the environment. Hence it links the operator of genes guaA and guaB to stop the biosynthesis. The operon was initially active, but then by the union of the repressor, it gets inactivated. This is a "repressible" operon.What do cells contain?
Answer:
cells consists of cytoplasm enclosed within a membrane, which contains many biomolecules such as protiens and nucleic acids.
please help!!!!!!!!!!!!!!!
*A simple circuit is created with one pathway, one battery, one light bulb, and one switch. Why does the bulb go out when you open the switch?
a. Because the battery dies.
b. Because opening the switch opens. the circuit.
C. Because too much electricity flows
through the bulb.
d. Because there is too much voltage.
Answer:
The Answer is B.
Explanation:
Answer:
the correct answer is B.
Explanation:
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the answer is a golgi body
name six harmful substance in food production
Answer:
Expired food and drugs; expired food and drinks that has stayed beyond the appropriate time
Impure water; impure water is dirty water that is not fit for the body system
Unripe fruits; fruits that is not yet due for...
Infested food
Poorly cooked food
Cigarette
Explanation:
What type of cells are produced during meiosis?
Answer:
gamete cells :)
Explanation:
hope this helps
Haploid cells are produced during meiosis.
Identical haploid daughter cells are produced from diploid parent cell.This process is required to produce egg and sperm cells for s exual reproduction.What is meiosis?Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. This process is required to produce egg and sperm cells for s exual reproduction.Cell division occurs twice during meiosis, one starting cell can produce four gametes.In each round of division, cells go through four stages: prophase, metaphase, anaphase, and telophase.To know more about meiosis here
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What should scientist do after completing a scientific investigation
Answer:
confirm the results if you're using edge
Explanation:
Answer:
B. confirm the results
Explanation:
i just took it
Las Vegas Natural History Museum
Define Museum.
Answer:
A museum is a location that contains historical art and artifacts.
Explanation:
I need to break free
I WANT TO BREAK FREE!!!!!!!!!!!!!
This illustration shows a kind of animal that is a free-living organism.
What is the common name of the group that contains this organism?
flatworms
tapeworms
cnidarians
annelids
Answer:
Gotta picture? That would help... Cause it says there's an illustration or something... But either way I just looked it up and found an illustration and the illustration showed a wormy lookin' thing and that wormy lookin' thing look like a flat worm. So I'ma say A. Flat worm. Tall me if I'm wrong! Thanks!
Answer:
Answer. This illustration shows a kind of animal that is a free-living organism. Phylum ( Platyhelminthes ) term is the common name of this organism. The phylum is either free-living or parasitic
Explanation:
help pls how to i do this, also whats the answer
Answer:
move 3 to the first 2 form last
Explanation:
(e) Describe the role a non-competitive inhibitor would play in the ability of enolase to perform
properly.
Answer:
it would not allow enolase to perform properly because it will bind to it and change its shape not allowing 2-phosphoglycerate to bind to it and convert to phosphoenolpyruvate. this is because it is non-competitive which means there is no way that the molecule could bind to the enzyme.
hope this helped!
Which of the following IS found in a bacteria cell?
Some especies are protected by law from being hunted because
Answer:
Explanation:
Some especies are protected by law from being hunted because if there not people would just keep on hunting them to extinction and also these kind of species are rare because people hunted alot of them
please mark brainly
A structure that looks the same and does the same job but was not present in a common ancestor is termed:______.
Answer:
The correct answer is - analogous.
Explanation:
Analogous structures or organs are the structures with the same look which is developed to perform the same job and not present because inherited by a common ancestor.
These structures are present in unrelated organisms and look the same from outside and perform the same action for example wings of bat and birds look and perform the same action but not inherited from a common ancestor.
What causes the differences in physical characteristics like hair color among people?
different versions of genes
variations in DNA length
different numbers of chromosomes
variations in cell nucleus size
Answer:
The answer is A. different versions of genes
Answer:
A
Explanation:
Different versions of genes
Carbon dioxide + Water + Sunlight -> Glucose + ?
Which of these is needed to complete this equation?
A Carbon
B Hydrogen
C Oxygen
D Nitrogen
Answer:
C. Oxygen
Explanation:
plant needed Carbon dioxide, water, and sunlight to produce Glucose and oxygen.
How does weathering affect Earth's surface?
Answer:
Weathering can wear away any exposed surface on earth over time. It can cause rough surfaces to become smooth, much like a tumbler smooths a rock. An obvious example of weathering is the change of the landscape at the sea. The tides can cause the beach to become smaller or larger.
Explanation:
Answer:
Weathering is the breaking down or dissolving of rocks and minerals on Earths surface.
Explanation:
Once a rock has been broken down, a process called erosion transports the bits of rock and minerals away. ... Weathering and erosion constantly change the rocky landscape of Earth. Weathering wears away exposed surfaces over time.