Answer:
either a barrier or chemical method can be used
i.e, is de usage pills or copper-t , condom in males .. etc ..... ( correct me if i m wrong ) ....
4. What is an example of positive feedback?
a. Regulating blood glucose levels
b. Maintaining internal body temperature
c. Producing milk in nursing mothers
Answer:
C
Explanation:
It is known as lactation. The suckling action of an infant produces prolactin, which leads to milk production; more suckling leads to more prolactin, which in turn leads to more lactation. This is a positive feedback system as the product (milk) produces more suckling and more hormone. When the child is no longer breast feeding, the prolactin drops off and milk production goes down.
The map shows the locations of major earthquakes in the Northern Hemisphere.
North
America
Pacific
Ocean
Atlantic
Ocean
Which sentence describes the pattern of earthquakes that the map shows?
Answer:
earthquakes around the North American continent
If a strand of DNA has the nitrogen base sequence, GCTAGATGCG, what will be
the sequence of the complementary strand?
Answer:
CGATCTACGC
Explanation:
The complementary strand of DNA to GCTAGATGCG is CGATCTAGCT.
The nitrogen bases in DNA are complementary to each other. This means that adenine (A) always pairs with thymine (T), and guanine (G) always pairs with cytosine (C).
The strand of DNA GCTAGATGCG has the following sequence of nitrogen bases:
G - guanineC - cytosineT - thymineA - adenineG - guanineA - adenineC - cytosineG - guanineThe complementary strand of DNA will have the following sequence of nitrogen bases:
C - cytosineG - guanineA - adenineT - thymineC - cytosineT - thymineG - guanineC - cytosineThe complementary strand is created by pairing the nitrogen bases in the original strand with their complementary bases. So, the guanine in the original strand pairs with the cytosine in the complementary strand, the cytosine in the original strand pairs with the guanine in the complementary strand, and so on.
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A polygenic trait is controlled by
A. two or more genes.
B. one gene that has only two alleles.
C. one gene with only one allele.
D. two alleles on two genes
Answer:
A. two or more genes because most genetic characteristics or traits are controlled by many genes.
Answer:
A. two or more genes
Explanation:
What describes the conversion of ADP to ATP?
Answer:
ATP stands for adenosine triphosphate, where three phosphoric acids attach themselves to provide high energy phosphate groups to it. This process of conversion of ADP to ATP is called as phosphorylation.
Explanation:
Scientists compare the structures of a chicken embryo and a human embryo at the same stage of development. They find that both vertebrates have
similar shapes and structures, including the presence of gill slits and tails. How is this comparison of the embryos used as supporting evidence of
evolution?
The similarities suggest that chickens and humans are the direct descendants of modern-day fish with tails and gill slits.
The similarities suggest that vertebrates pass through each of the adult stages of their evolutionary history as they develop.
o
The similarities suggest that vertebrates can undergo genetic changes during development that lead to the evolution of new species.
Answer:ABCD
Explanation:
Answer:
is C correct?
Explanation:
Which option states an advantage of sexual reproduction?
Answer:
The advantages of sexual reproduction: produces genetic variation in the offspring. the species can adapt to new environments due to variation, which gives them a survival advantage. a disease is less likely to affect all the individuals in a population.
I hope it's helpful!
5. All cells
a. Are enclosed in a membrane that maintains internal conditions different from the surroundings
b. Have DNA as genetic material
c. Require energy to function
d. All of the above are correct
A student prepares for a five-mile run so she eats a nutritious meal three hours before the run. Which correctly illustrates the transformation of energy from eating the meal to the five-mile run?
Answer: The transformation of energy from eating the meal to the five mile run is from
Chemical energy --> kinetic energy--> thermal energy.
Explanation:
In nature, energy exists in various forms. These forms are inter- convertible, that is, one form of energy can be transformed into another form. Such energy transformations are governed by the laws of thermodynamics.
The first law of thermodynamics states that energy cannot be created or destroyed but may be transformed from one form into another.
Living organisms which comprises the biotic components of an ecosystem are energy converters. For example:
--> plants convert solar energy into chemical energy during photosynthesis
--> animals convert chemical energy into kinetic energy when they move about. This in turn is lost as heat energy when highly complex organised food molecules are broken down.
From the question, the student ate a nutritious meal ( CHEMICAL energy) which is converted to KINETIC energy as she took a five miles run ( as she worked). 'Work' here refers not only to physical activities but also to the various metabolic processes necessary to maintain life. And each time work is done, kinetic energy is converted to heat( thermal energy)
What is Carbon Dioxide?
A medicine
B candy
C colorless gas
D special kind of steel
Answer:
Colorless gas
Explanation:
__H2SO4+__NaNO2= __HNO2+___Na2SO4
(fill in the blanks, and balance the equation)
1 H2SO4 + 2 NaNO2 ---> 2 HNO2 + 1 Na2SO4
How do the distances between the terrestrial plants compare to the distances between the gas giants?
Answer:
They are different from rocky or terrestrial planets that are made of mostly rock. Unlike rocky planets, gas giants do not have a well-defined surface – there is no clear boundary between where the atmosphere ends and the surface starts! The gas giants have atmospheres that are mostly hydrogen and helium.
Explanation:
I hope this helps!
They vary from planets that are predominantly made of rock, such as rocky or terrestrial planets. Unlike solid planets, gas giants lack a clearly defined surface, there is no discernible line separating the atmosphere from the surface.
What are terrestrial planets?Telluric planets are another name for terrestrial planets. The Latin words terra and tellus, which both indicate Earth, are the source of the words terrestrial and telluric, respectively.
While the terrestrial planets were warmed by the sun's rays, the Jovian planets developed above the frost line.
Worlds that could float on water and worlds appropriate for manned missions were created under very distinct circumstances, but they have some striking similarities. Every world in our solar system is different.
Therefore, the atmospheres of the gas giants are primarily composed of hydrogen and helium.
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Which distinguishes mitosis from meiosis?
A. Mitosis has one DNA replication, while meiosis has two DNA replications.
B. In mitosis, the nucleus divides once. In meiosis, the nucleus divides twice.
C. In mitosis, homologous chromosomes pair up. In meiosis, there is no pairing of chromosomes.
D. Mitosis results in the production of gametes, while meiosis results in the production of body cells.
Answer:
Your answer would be B.
Explanation:
In mitosis, the nucleus divides once. In meiosis, the nucleus divides twice.
Answer:
te ya uz dağ dfjjhtb5j6n5j
Are any change in the sequence of bases in DNA or RNA that can cause by mutagen or can happen spontaneously in the cell
Answer:
MUTATION
Explanation:
Mutation is a change or alteration in the genetic sequence of a DNA or RNA (nucleic acid) that are induced by a chemical substance called MUTAGEN or by a spontaneous occurrence. Mutation are of different types depending on how it occurs in the cell. A mutation can be deletion (removal), substitution (replacement), insertion (addition) etc.
Based on this question that states that "any change in the sequence of bases in DNA or RNA that can be caused by mutagen or can happen spontaneously in the cell", the process of MUTATION is being described.
Choose which statement best describes an element.
A. Anything that takes up space
B. A pure substance that cannot be broken down into other substances by chemical means.
C. Water
D. Atom has a nucleus with neutrons and protons in it.
Answer:
B
Explanation:
Elements are pure substances that cannot be broken down into other substances by chemical means .
If sperm and egg cells have half of the number of chromosomes found in other body cells, how do gametes form?
Question 1
Which of the following can convert nitrogen in the air into a form plants can use?
A
bacteria
B
fungi
C
animals
D
protists
Bacteria can convert nitrogen in the air into a form plants can use.
The earth atmosphere contain a huge amount of oxygen which is needed by plants. These Nitrogen can be converted into a form in which can be used by plants through a process known as nitrogen fixation.
Fixation is a process that converts nitrogen in the atmosphere into forms in which plants can use. Nitrogen can be fixed using fertilizer.
Also, bacteria can fix nitrogen into the soil naturally.
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A. Describe the role of the promoter in eukaryotic gene expression. Explain how a negative regulatory molecule could inhibit transcription at the promoter.
B. Identify TWO events that occur during RNA processing. Explain how RNA splicing increases the variation of mRNA molecules.
C. Describe the role of miRNA in gene expression.
Answer:
Explanation:
A. The role of promoter in eukariotic gene expression is It is to bind transcription factors that regulate transcription initiation. This molecule is so important because control the binding of RNA polymerase to DNA. The promoter region may be short or very long; the longer the promoter is, the more protein binding space is available. A negative regulatory molecule has the possibilty to inhibit transcription at the promoter because these molecule block the binding of RNA polymerase to the promoter region, thus not allowing the initiation of transcription, in some particular cases the negative regulator binds to the lac repressor and will bind to the promoter in the same site where RNA polymerase would bind to.
B. Two process that occurs during RNA processing are RNA splicing and 5′ capping, 3′. RNA splicing is a process known for removing the introns from the pre-RNA and stuck back together the restant parts, exons. This process has as a goal form a mature mRNA that does not contain the intron sequences. RNA splicing has an effect on the variation of mRNA molecules because through a process called alternative splicing more than one mRNA can be made from the same gene.
C. Even though they are not quite the same thing miRNA and negative regulatory molecules have the same role, which inhibits the translation and silence genes. They regulate gene expression by binding to the 3'-UTR of their target mRNAs and destabilizing the mRNA and translational silencing, repressing protein production. Even so, under specific circumstances, miRNA can activate translation or regulate transcription.
How do adult drones differ from adult worker ants?
a. Drones have wings; workers don't
b. Drones have eight legs; workers have six
c. Drones lack exoskeletons; workers have them
d. Drones have simple eyes; workers have compound
eyes
Answer:
a. Drones have wings; workers don't
Explanation:
"Flying ants may be male (the drone) or female (the queen)."
Where are most mountains on earth formed
At volcanic chains
At strike slip faults
At mid ocean ridges
At convergent plate boundaries
What is the mRNA made from the following DNA.
CGATCG?
(please help!)
A. CGTUCG
B. CGATCG
C. GCTAGC
D. GCUAGC
Answer:
GCUAGC (D)
Explanation:
DNA always consists of A/T and C/G
RNA (mRNA/tRNA always consists of A/U and C/G but never T!
If you have a T in your DNA, your mRNA will have an A.If you have an A in your DNA, your mRNA will have a U.DNA never has a U, but RNA never has a T.
Hope this makes sense!
PLS HELP ASAP!!!!!!!
Answer:
3. A and B are true
4. oxygen, photosynthesis, I think oxygen, cellular respiration
Explanation:
Hope this helps! :) I am think all of my answers are correct.
What are created during the process of translation?
Answer:
a gene expression
Explanation:
and
What determines the code, or information, of a DNA molecule?
A - the structure of nitrogen bases
B- the color of nitrogen bases
C- The sequence (order) of nitrogen bases
D- the frequency of nitrogen bases
Answer:
C- The sequence (order) of nitrogen bases
Explanation:
The total variety of all living things on Earth is described as
А an ecosystem
B biodiversity
с a population
D competition
Answer:
biodiversity
Explanation:
An ecosystem is all the things in an biome but not all Earth
biodiversity is the variety of all living things
a population is the number of a species in an area
competition is when animals compete for resources
P.S. Please mark Brainliest if correct?
True or False
An increase in cell size results in an increase in surface area to volume ratio.
Answer:
true I think
Explanation:
I think so I hope so
using the count data and observational data you acquired calculate the number of cfus in the original sample
Answer:
cuales son los datos ?
Explanation:
cuales son los datos
Which of the following is the
amount of time between the
fertilization process and the birth of an organism?
A. 9 months
B. 1 year
C. up to 2 years
D. it depends on the species
Answer:
D. it depends on the species
Explanation:
Everything is different
Do spring tides have the lowest tides
Answer:
No
Explanation:
King tides are the highest tides. ... In the lunar month, the highest tides occur roughly every 14 days, at the new and full moons, when the gravitational pull of the Moon and the Sun are in alignment. These highest tides in the lunar cycle are called spring tides.
PLEASE HELP !!!!! ILL GIVE THE BRAINIEST!!!
Answer:
hello i am not sure but i think the answer is D
Each species has a special scientific name that is selected by the person or group that discovers it. The name typically conveys information about the species. Thus, option D is correct.
What are the main characteristic for changing an organism?The kingdom is a smaller taxon than the recently added domain, which is a more expansive taxon. Similarities in outward physical characteristics serve as the foundation for the Linnaeus system.
Gene variants, sometimes known as mutations, can cause genetic differences, or a normal process in which genetic information is rearranged as a cell prepares to divide can also cause genetic variations (known as genetic recombination).
Therefore, Different phenotypes can be introduced into an organism by genetic changes that change gene activity or protein function.
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