Answer:
lthough rarely eaten by humans, tunicates are an important link in the food chain and thus indirectly provide humans with a source of food. Tunicates contain some unusual chemicals, and some of these may prove useful as drugs. Tunicates are considered acraniate chordates because tunicates and chordates have the following features in common: a notochord; a dorsal, hollow nerve cord; and pharyngeal gill slits at some time in their lives.
Explanation:
Suppose we have access to the four nucleotides which compose DNA: A, T, C and G. Placed into a sequence with one another, they form a code which can be read by the cell to provide a blueprint for the creation of proteins. When forming a sequence of three nucleotides, the sequences TAA, TAG, and TGA are codes to tell the cell to stop reading the DNA. Assume each sequence of nucleotides is equally likely to be formed.
A. How many possible ways are there to form a sequence of three nucleotides? - 64
B. Of the possible ways to form a sequence of three nucleotides, what is the probability to form a stop sequence? = 0.0469
C. What is the probability that a sequence that is not a stop sequence is formed? 64-3 = 61 61 = 0.983
D. For a three-nucleotide sequence, G is engineered to be in the third place. For the remaining two nucleotides in the sequence, C cannot be in the second place (for example CTG is allowed but not TCG). How many sequences can be formed?
E. Of the number of sequences found in Part D, what is the probability that a stop sequence is formed?
Answer:
The correct answer is :
A. we know there are four nucleotides and three sequence makes a triplet code then total possible ways are:
4^3 = 4×4×4= 64 ways.
B. The stop codons by 64 amino acid or triplet codes: TAA, TAG, and TGA then the probability would be = 3/64 = 0.0469
C. the probability that a sequence that is not a stop sequence is formed = total minus probability of stop codons:
64-3 = 61
61/64 = 0.953
D. G at end place and c should not be in the middle then:
the codes will be =
ATG
AGG
AAG
TTG
TGG
TAG
CTG
CGG
CAG
GTG
GGG
GAG
Total 12 triplet code sequences.
E. Among all these 12 codons there is only one stop codon that is TAG so the probability of this stop codon is :
1/12 = 0.083
The long term survival of any species of organism is possible only if the organisms can
small grasses are usually the first plants to appear in an area after a disturbance. these grasses are an example of which type of species?! HELP
A(n) __________ is all the animals of the same species in the same area at the same time.
A. community
B. population
C. species
D. ecosystem
Answer:
B. Population
Lymph capillaries Lymph capillaries filter lymph. originate as closed-ended tubes associated with blood capillary networks. cannot be discerned structurally from cardiovascular system capillaries. include layers of smooth muscle for peristalsis. concentrate lymph prior to passing it to larger lymphatic vessels.
Answer:
The correct answer is ''originate as closed-ended tubes associated with blood capillary networks.''
Explanation:
The lymphatic vessel system begins within the tissues in the form of tubes closed at one end called lymphatic capillaries (chyliferous in the intestine). These have an internal endothelial lining, similar to that of blood capillaries. These vessels are found in greater numbers in the skin, the digestive tract, and the respiratory system. The tissue fluid penetrates the lymphatic capillaries by diffusion, with the help of a small indirect pressure gradient, which gives it the arterial pressure. The walls of the lymphatic capillaries offer little resistance to the entry of substances; they are more permeable than capillaries in the blood system. The tiny capillaries form larger vessels, similar to the venules and veins of the blood vessel system. The walls are thinner than those of the veins of the blood system and its valves much more numerous.
Another way to talk about mental illness is to say
Group of answer choices
O mental wellness
O mental malfunction
O disordered mentality
O mental health challenge
( Its mental health class week )
Answer:
1
Explanation:
Answer:
4
Explanation:
3. At the playground, which one is an example of a wheel and axle?
A. merry-go-round B. seesaw
C. slide
D. swing
4. Why is wheel and axle a simple machine?
A. It is simple.
C. It has a wheel.
B. It is a machine.
D. It makes our work easier.
5. Which simple machine would stairs be an example?
A. inclined plane
B. lever C. pulley D. wedge
6. A stiff bar that moves about a fixed point is a
A. lever B. wheel and axle C. wedge
D. inclined plane
7. Which of the following is the use of inclined plane?
A. To deliver a person from high area to low area.
B. To deliver a person from low area to high area.
C. To lift an object easier by changing the direction of the effort force.
D. It lessens the effort exerted in transporting weight over a distance and height:
8. Which simple machine is made of rigid or strong bar that is free to move at a fixed point?
A. lever
B. pulley
D. wheel and axle
C. wedge
9. Seesaw, scissors, pliers are examples of which kind of
lever as illustrated below?
A. First-class lever C. Second-class lever
B. Third Class lever D. Fourth-class lever
10. Which simple is used by the man to move the barrel as shown in the picture below?
A. inclined plane
B. lever
C. screw
D. wedge
Answer:
3.B
4.B
5.A
6.D
7.A
8.B
9.D
10.A
Which of the following statements best describes a decomposer?
A. they are abiotic and they only eat producers they are biotic
B. they consume other biotic things for energy
C. they are biotic and they break down dead material
D. they are abiotic and they eat both plants and animals
Answer:
b
Explanation:
The statement that best describes a decomposer is that they are biotic and they break down dead material; this is option C. They break down dead organic matter, such as dead plants and animals, into simpler substances that can be used by other living organisms.
What are decomposers?Decomposers are an important part of the food chain because they break down dead organic matter into simpler substances that can be reused by other living organisms. When plants and animals die, their bodies are broken down by decomposers into nutrients such as carbon, nitrogen, and phosphorus, which are released back into the soil or water. These nutrients are then taken up by other living organisms, such as plants, which use them to grow and produce their own energy.
Hence, The statement that best describes a decomposer is that they are biotic and they break down dead material that is the option C
learn more about the Decomposers here
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The condition of Earth’s atmosphere at a particular time and place is called _________________.
Explanation:
The condition of earths atmosphere at a particular time and place is called weather
The availability of natural resources in any habitat determines the____of that habitat
A.) intraspecific competition
B.) carrying capacity
Answer:
B, carrying capacity
Explanation:
b/c caring capacity the avability of natural resources in any habitat of the habitat
what is dynamic equilibrium
Answer:
a state of balance between continuing processes.
Explanation:
How does dividing species into kingdoms help us understand them?
It helps us to see which animals existed first.
It helps us understand how animal organ systems work.
It helps us understand the differences and similarities among living things.
It helps us to predict which changes animals will make to adapt to their surroundings.
Answer:
C) It helps us understand the differences and similarities among living things
Explanation:
We split species into kingdoms based on their traits, so animals with similar traits will go to one kingdom and one with different traits will go to another. It helps us see similarities and differences in different species.
PLZ HELP FREE BRAINLIST!!!!
How do you know that an organism belongs to the animal kingdom?
A. It breaks down things in nature, it can survive in extreme conditions, and has at least one cell.
B. It is a single-celled organism that can make its own food, and that can breathe and move around.
C. It can make its own food, it can breathe and move around, and it has many cells.
D. It cannot make its own food, it can breathe and move around, and it has many cells.
Answer:
D
Explanation:
cuz the first two r bacteria cells since theyre single cells
and the 3rd one is a plant since its an autotroph and makes its own food
the last one is correct cuz its a heterotroph;depends on otehrs for food, and has multiple cells
Explanation:
i think b or d , I will confirm
Please indicate the correct number of NADH molecules made during electron
transport and oxidative phosphorylation.
3
1
0
2
Answer:
3
sort of a trick question. but the process starts off with 3 NADH the rest are FADH. and no more NADH are produced so, 3.
Process 2 is known as
Answer:
Transcription
Explanation:
From the available diagram, process 2 converts, or transcribe or copies DNA nucleotide sequence information into RNA sequence information.
Hence, in this case, the correct answer is TRANSCRIPTION
Normal mitotic cell division results in each daughter cell having 1/2 the chromosomes
A True
B False
Answer:
B
Explanation:
it should be a whole number and not 1/2
What characteristics do animals and protists share?
A. The ability to make their own food. B. The ability to move around.
C. The ability to break down decaying matter D. Having multiple cells.
Answer:
B
Explanation:
They both move around
Which hormone produces increases in size, especially in stem and fruits? auxin cytokinin gibberellin ethylene
Answer:
The hormone ethylene is a gas and disperses easily.
Explanation:
Just took the test.
which of the following statements is accurate for DNA replication in your cells but not PCR
Answer:
Ligase is essential.
Explanation:
The statements that is accurate for DNA replication in your cells but not PCR is that ligase is essential
For better understanding let's explain why ligase is essential
Ligases Enzyme is very essential in DNA replication. it is use for DNA metabolism. They help in catalysis by joining of nicked DNA which is very much needed in in DNA replication. In DNA repair pathways, Ligase is used in the re-synthesis of DNA. It is found that in higher organism, it is of different types..Ligase is not essential in PCR due to the fact that it is not needed.
From the above we can therefore say that the answer The statements that is accurate for DNA replication in your cells but not PCR is that ligase is essential is correct
Learn more about DNA replication from:
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types of carbohydrates and their functions
Answer:
Carbohydrates give you energy for instance marathon runners will eat a lot of carbs like pasta and bread to give them energy
Explanation:
Please help on both pls pls please please
Answer:
6. D 7. C
Explanation:
Answer:
6: D) Paramecium and animal cells are both a round shape.
7: C) Plant cells are square and animal cells are round.
Explanation:
6--
A) false. Animals are multicellular organisms
B) false. Paramecium and animal cells have round characteristics
C) false. Paramecium are unicellular organisms
D) true.
7--
A) false. Animal cells have round characteristics
B) false. Both plant and animal cells are multicellular organisms.
C) true. (the plant cell shape assists in the organisms' structure/resource movement)
D) false. Both plants and animals are made of cells, billions of them.
HELP!!
Question: Acetylation of histones will prevent transcription from happening
True or False
Answer:
T
Explanation:
The medical term for "to break" is
- Who is more likely to become extinct, especially when the conditions in the environment change?
generalists
specialists
Carnivores
producers
1. Geologists use physical properties to identify minerals. For example, the blank
cleavage, color, fracture, hardness, luster, specific, gravity, streak, texture
Answer:
The correct answer is - crystal form (external shape).
Explanation:
Physical properties are used for the identification of the minerals that include specific gravity, streak, texture, luster color, hardness, cleavage, and crystal form.
The most common physical property of the minerals in crystal form or external shape of the mineral. This is the property of the mineral that gives an idea about the homogenous possessing a 3-D internal order.
Answer:
crystal form external shape
Explanation:
i copied lol
2. Which is an example of interspecific competition?
blue jays eating seeds from my bird feeder
white-tailed deer looking for food in a field
polar bears praying on seals in the artic ocean
squash outgrowing lettuce in my garden
Bumblebees show some ability to control their own body temperature. During cold weather, bumblebees have been observed warming their flight muscles by shivering. The bees are able to maintain a body temperature several degrees above that of the surrounding air. Regulation of their internal body temperature is an example of A. diffusion B. synthesis C. respiration D. Homeostasis
Answer:
D. Homeostasis
Explanation:
An endocrine system refers to a series of ductless glands and organs responsible for the production and secretion of hormones that are used by the body for the performance of various functions such as metabolism, controlling growth, reproduction, mood, sleep, etc. These hormones are secreted directly into the circulatory system (blood) and then transported to the organs and tissues in the body.
Basically, the endocrine system contributes significantly to the state of homeostasis in the body.
Homeostasis can be defined as a process through which a living organism maintains a steady or stable physical, internal and chemical environment that is ideal to enhance life and proper functionality.
Hence, regulation of the internal body temperature of the bumblebee is an example of homeostasis.
Answer:
Homeostasis
Explanation:
lab activity blood type pedigree mystery Joseph and rita
CAN SOMEONE PLEASE HELP ME WITH THIS SCIENCE QUESTION :)
Answer:
I think its A
Explanation:
Alternate energy does not require the equipment such as those oil pumpers.
You are testing learning and memory in two strains (A and B) of hamsters by determining which hamsters learn and remember how to navigate a maze better. You discover that a strain of hamsters raised in a diverse environment has enhanced memory compared to a strain of hamsters raised in a bare cage. You look at a specific gene that is involved in brain development and is activated during learning and memory. If you use bisulfite treatment and subsequent sequencing to study the methylation pattern is of the promoter for this gene, you find that at the same region of the promoter sequence:
Strain A has the following bisulfite treated sequence: GTACGTTAAACGATCG
Strain A has the following untreated sequence: GTACGTTAAACGATCG
Strain B has the following bisulfite treated sequence: GTATGTTAAATGATTG
Strain B has the following untreated sequence: GTACGTTAAACGATCG
Based on the sequences above, greater levels of transcription for this learning and memory gene more likely occur in which of the strains?
Answer:
The correct answer is - Strain B.
Explanation:
The methylation process is adding the methyl group to the DNA molecule that can alter the activity of the DNA segment without any change in the sequence. Methylation presence in the promotor in a gene can repress the transcription process.
By the sequence given it is clear that strain B is not treated and less likely to methylated whereas strain B is more likely to methylated so the greater transcribe sequence would be - Strain B.