Answer:
Lymph nodes swell to protect us from illness if they do not swell non fatal illnesses could spell out death
Explanation:
14. What do the embryos of different vertebrate species have in common?
Answer:
Similarities in embryos are evidence of common ancestry. All vertebrate embryos, for example, have gill slits and tails. Most vertebrates, except for fish, lose their gill slits by adulthood.
Explanation:
itz from gologolo lol I hope it helps uh
keep smiling #smilies
Which of the following techniques employs a probe consisting of a labeled, single-stranded DNA of known sequence that can find and bind to a complementary sequence present in a large sample of different DNA sequences?
a. DNA hybridization
b. RFLP
c. PCR
d. DNA sequencing
Answer:
Explanation:
PCR
While alive, an organism absorbs (radioactive) carbon 14 at such a rate that the proportion of carbon 14 in the organism remains at a known constant level. When it dies, it no longer absorbs carbon 14, so its proportion of carbon 14 begins to decrease. The half-life of carbon 14 is 5,600 years. A human skeleton is discovered whose level of carbon 14 is 15% that of a living human. To the nearest 100 years, how long ago did the person die
Answer:
The person has been dead for approximately 15,300 years
Explanation:
Available data:
The half-life of carbon 14 is 5,600 yearsThe human skeleton level of carbon 14 is 15% that of a living humanTo answer this question we can make use of the following equation
Ln (C14T₁/C14 T₀) = - λ T₁
Where,
C14 T₀ ⇒ Amount of carbon in a living body at time 0 = 100%C14T₁ ⇒ Amount of carbon in the dead body at time 1 = 15% λ ⇒ radioactive decay constant = (Ln2)/T₀,₅T₀,₅ ⇒ The half-life of carbon 14 = 5600 yearsT₀ = 0T₁ = ???Let us first calculate the radioactive decay constant.
λ = (Ln2)/T₀,₅
λ = 0.693/5600
λ = 0.000123
Now, let us calculate the first term in the equation
Ln (C14T₁/C14 T₀) = Ln (15%/100%) = Ln 0.15 = - 1.89
Finally, let us replace the terms, clear the equation, and calculate the value of T₁.
Ln (C14T₁/C14 T₀) = - λ T₁
- 1.89 = - 0.000123 x T₁
T₁ = - 1.89 / - 0.000123
T₁ = 15,365 years
The person has been dead for approximately 15,300 years
How many kinds of mosquito are common in Nepal l
there are 130 kinds of mosquito are common in Nepal l
Without replication, organisms could not successfully
move.
grow and reproduce.
feed.
make proteins.
Answer: grow and reproduce
Explanation:
Which gas is exhaled along with used air?
SCIENCE QUESTION... ☺️
Explanation:
When we take a breath, we pull air into our lungs that contains mostly nitrogen and oxygen. When we exhale, we breathe out mostly carbon dioxide.
Gina is lactose intolerant but she loves to eat cheesy fries from her local restaurant. What do you suggest Gina does differently so she gets the same nutrients but does not suffer with the bloating and pain she feels after eating cheesy fries?
a. Eat a smaller portion of fries and order a cup of vegetable soup.
b. Add jalapeño peppers to the fries since the spice will counteract the effects of the dish.
c. Order macaroni and cheese instead.
d. Ask for a low-fat cheese option
Answer:
A
Explanation:
Its the most logical one
information of vertebrates mammal
Answer:
A vertebrate is an animal with a spinal cord surrounded by cartilage or bone. The word comes from vertebrae, the bones that make up the spine. Animals that are not vertebrates are called invertebrates. Vertebrates are adapted to life underground, on the surface, and in the air. They feed upon plants, invertebrate animals, and one another. Vertebrate faunas are important to humans for food and recreation.Vertebrate Classes
Agnatha (Jawless Fish) Aves (Birds) Amphibia (Amphibians) Chondrichthyes (Rays, Sharks, Skates) Mammalia (Mammals) Osteichthyes (Bony Fish) Reptilia (Reptiles)
Explanation:
i)
State why the cobalt chloride paper is kept in a jar with a ground glass
stopper
Answer:
bcz it is harmful for human body
Explanation:
Which nutrient cycle has NO atmospheric (gas) form
A) Carbon
B) Nitrogen
C) Phosphorus
D) Water
Answer:
c.) phosphorus
Explanation:
it can be found in the atmosphere as very little dust particles
what are some of the actions that the somatic nervous system does?
animal modified for climbing are called
Which of the following findings would lead you to determine that an infant's airway is open
Answer:
blowing air into his/her mouth and checking for an increase in the thoracic region........I GUESS
a phlebotomy technician has collected a neonatal screening card. which of the following actions should the technician take to properly dry the blood stop collection card?
Answer:
place the card on a flat dry surface
define the following terms
Nutrition
Autotrophic
Which food has the greatest amount of polyunsaturated fat?
Select the correct answer.
How does the high specific heat of water help maintain the temperature of earth?
A By heating and cooling more slowly than land or air
B. By heating and cooling faster than land or air
с.
By heating faster but cooling more slowly than land or air
The high specific heat of water help maintain the temperature of the Earth by heating and cooling more slowly than land or air. Thus, the correct option is A.
What is the specific heat of water?The specific heat of an object is the amount of heat which is required to increase or raise the temperature of unit mass of that particular substance through one degree celsius. Specific heat is represented by the symbol 'c'. Its unit in SI system is Joule /(kg °C) and in CGS is cal / (gm °C).
The high specific heat of water helps in regulating the rate at which air changes its temperature, which is why the temperature of the planet change between different seasons is gradual rather than sudden, especially the geographical locations near the ocean.
Therefore, the correct option is A.
Learn more about Specific heat here:
https://brainly.com/question/11297584
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Phân tích các yếu tố cho thấy ĐẤT là môi trường đa dạng nhất về các loại sinh vật?
.... what you wrote isn’t a question.... you wrote a statement.....
Here is what you wrote translated to English
Analysis of factors shows that SOIL is the most diverse environment in terms of organisms?
Answer:
I don't no answer sorry
Explanation:
follow
When curare, a neuromuscular poison, is dropped onto an isolated muscle-nerve preparation in a laboratory, the muscle does not contract when the nerve is stimulated, even though neurotransmitter is released from the nerve cell. Why does this happen
Answer:
Explanation:
Whenever the nerve terminal's action potential depolarizes, calcium enters the cell through the channels. Calcium allows acetylcholine (ACh) to be released more easily. These ACh molecules subsequently circulate into the synaptic cleft and attach to the motor end-plate of the nicotinic cholinergic receptors. Acetylcholine molecules connect to nicotine ion-channel receptors present on cell membrane the of muscle cells, enabling the ion channels to open. Calcium ions then enter the muscle cell, kicking off a series of events that eventually result in muscular contraction.
Curare is a kind of neuromuscular relaxant blocker that is non-depolarized in nature. Nondepolarizing muscle relaxants work as competitive agonists, binding to ACh receptors but failing to activate ion channels. As a result, they inhibit ACh from bonding, preventing the development of endplate potentials and inducing muscle paralysis.
The term "evolution" is best described as A) a process of change in a population through time B) a process by which organisms become extinct C) the reproductive isolation of members of certain species D) the replacement of one community by another
Answer: A) a process of change in a population through time
Explanation:
Answer:
A
Explanation:
Evolution is a process of change in a population through time
What is the role of RNA?
Answer:
It is the 1st one ○ to provide the original blueprint for protein production
Explanation:
RNA polymerase (green) synthesizes RNA by following a strand of DNA. RNA polymerase is an enzyme that is responsible for copying a DNA sequence into an RNA sequence, duyring the process of transcription.
The graph below shows the changes in the number of species in an ecosystem
Species Diversity
300
200
Number of Species
|..
100
و 12 19 0
1989
1994
1980
Year
Which event was most likely the cause of the changes in species diversity in this ecosystem?
A large volcanic eruption
B A flash flood
Amatorado
D Amigration of cuts
what is cyclin dependent kinase?
Answer:
please mark as brainliest answer as it will also give you 3 points
Explanation:
Cyclin-dependent kinases (CDKs) are the families of protein kinases first discovered for their role in regulating the cell cycle. They are also involved in regulating transcription, mRNA processing, and the differentiation of nerve cells.[1] They are present in all known eukaryotes, and their regulatory function in the cell cycle has been evolutionarily conserved. In fact, yeast cells can proliferate normally when their CDK gene has been replaced with the homologous human gene.[1][2] CDKs are relatively small proteins, with molecular weights ranging from 34 to 40 kDa, and contain little more than the kinase domain.[1] By definition, a CDK binds a regulatory protein called a cyclin. Without cyclin, CDK has little kinase activity; only the cyclin-CDK complex is an active kinase but its activity can be typically further modulated by phosphorylation and other binding proteins, like p27. CDKs phosphorylate their substrates on serines and threonines, so they are serine-threonine kinases.[1] The consensus sequence for the phosphorylation site in the amino acid sequence of a CDK substrate is [S/T*]PX[K/R], where S/T* is the phosphorylated serine or threonine, P is proline, X is any amino acid, K is lysine, and R is arginine.[1]
Luke was Isked to find the median of the following
numbers:
16, 24, 12, 7, 30, 11,22
The work below shows the steps he used.
X X 16 22 24 30
What error did Luke make?
O He forgot to put the numbers in order first.
O He crossed off the low and high pairs incorrectly.
O He left out a number when putting the numbers in
order.
O He did not make an error.
16 + 22 = 38
2 2
16 22 = 38
19
Answer:
He left out a number when putting the numbers in order.
Explanation:
To find the median of a set of numbers, first arrange the numbers in order from least to greatest. Then begin crossing numbers of from each side at the same time.
Luke did not cross numbers off from each side, but only crossed them off from the left side. He also skipped a number, given there are only 2 "X's."
The list should look like so:
7, 11, 12, 16, 22, 24, 30
There should be three numbers before 16, not two as he has listed.
Scientists have been studying the size of three populations in a river in Ireland. In this ecosystem, pike (a type of big fish), and perch eat snails. The data showed that all three populations were stable. Then the snail population increased suddenly. What will likely happen to the size of the perch population as a result? The size of the perch population will...
Options:
A. Stay the same. The size of it's consumer population did not change, so the number of deaths in the perch population did not change. There will be the same number of births and deaths in the perch population.
B. Decrease. The larger snail population will take more energy storage molecules from the ecosystem, leaving fewer available for the perch population. This will lead to more deaths than births in the perch population.
C. Increase. The larger snail population will provide more energy storage molecules for the perch population, so they will reproduce more. This will lead to more births than deaths in the perch population.
D. Increase. An increase in any population within an ecosystem will lead to an increase in the sizes of all other populations in the ecosystem.
Answer:
C. Increase. The larger snail population will provide more energy storage molecules for the perch population, so they will reproduce more. This will lead to more births than deaths in the perch population.
Explanation:
Which of the following is true
about true-breeding plants if they are allowed to self-pollinate?
A. They never have offspring with the same traits as the parent plant.
B. They have offspring with traits that are identical to the parent plant with one or two differences.
C. They always have offspring with traits identical to the parent plant.
Answer:
b
Explanation:
some are the same while others are different (traits)
disorders of urinary system
Answer:
Bladder infections - (cystitis) usually caused by bacteria.Enlarged prostate - in men, this can make it difficult to empty the bladder.Incontinence - when urine leaks out of the urethra.Kidney infections - when a bladder infection ‘backs up’ the ureters.Kidney stones - caused by infection and high blood levels of calcium.
Hope this helps
•. otal genomic structure of an organism inherited from parents is known as -
a) Gene
b) Allele
c) Phenotype
d) Genotype
A phosphate group has the following chemical composition:
a. -OH
b. -COOH
c. -PS2
d. -CH3
e. -PO4
Answer: The phosphate group has the chemical composition [tex]-PO_{4}[/tex].
Explanation:
A phosphate group is a group where one phosphorus atom is attached to four oxygen atoms.
The oxygen atoms are attached to the phosphorus atom via single bond and one oxygen atom is attached to the phosphorus atom via double bond.
The chemical formula which represents a phosphate group is [tex]-PO_{4}[/tex].
Thus, we can conclude that phosphate group has the chemical composition [tex]-PO_{4}[/tex].
A chain of monosaccharides is called a _________.
A. quasi-saccharide
B. multisaccharide
C. polysaccharide
D. glucose molecule
Answer:
C. polysaccharide
Explanation:
^_^^_^^_^
