Answer:
If you are religious then you might believe in Adam and Eve and the Garden of Eden. But if you believe in science, then you would believe in evolution.
Sapiens or humans have been on the Earth for around 300,000 years.
Earlier ancestors existed 1.4 to 2 millions years ago.
Earliest writing is 5400 years old.
The bible is 2700 years old.
Why was there no record of Adam and Eve earlier?
Because they never really existed until someone created them.
The someone wasn't a deity . It was a man. A man who created a story.
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
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
Complete each sentence with the correct word or phrase
a. An action potential reaches the axon terminal causing __________to open.
b. Acetylcholine diffuses across the synaptic cleft before binding to its receptor, which is located on the _____
c. When the membrane potential reaches ________an action potential spreads across the sarcolemma due to the opening of ___________
d. In response to acetylcholine binding, ________ move into the muscle fiber causing the membrane potential to rise.
Answer:
a). Voltage-gated Ca2+ channels
b). the motor end plate
c). Threshold, voltage-gated Na channels
d). sodium ions
Explanation:
a). The voltage-gated [tex]Ca^{2+}[/tex] channels are the key transducers of the membrane potential that changes into a intracellular [tex]Ca^{2+}[/tex] transients which initiates the physiological events. When the action potential makes a contact with axon terminal, the voltage-gated [tex]Ca^{2+}[/tex] channels opens.
b). The acetylcholine is the main neurotransmitter of the parasympathetic nervous system. It helps in blood vessels dilation, muscle contraction, and perform many more functions.
It diffuses with the synaptic cleft that is located on the motor end plate of the nervous system.
c). The membrane potential is also known as the membrane voltage or the transmembrane potential. When it recaches the threshold, the voltage-gated Na channels opens to spread the action potential across sarcolemma.
d). The sodium ions in case of acetylcholine binding moves to the muscle fiber due to which the membrane potential rises.
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.
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
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
WRITE THE DEFINITIONS OF EACH ANIMAL ORGANELLE LISTED. (1) nucleolus (2) nucleus (3) ribosome (4) vesicle (5) rough endoplasmic reticulum (6) Golgi apparatus (7) cytoskeleton (8) smooth endoplasmic reticulum (9) mitochondria (10) vacuole (11) cytosol (12) lysosome (13) centriole
Answer: nucleolus: a small dense spherical structure in the nucleus of a cell during interphase. nucleus: the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass. ribosome: a minute particle consisting of RNA and associated proteins found in large numbers in the cytoplasm of living cells. They bind messenger RNA and transfer RNA to synthesize polypeptides and proteins. vesicle: a small fluid-filled bladder, sac, cyst, or vacuole within the body. rough endoplasmic: reticulum (RER), series of connected flattened sacs, part of a continuous membrane organelle within the cytoplasm of eukaryotic cells, that plays a central role in the synthesis of proteins. Golgi apparatus: a complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport.
Explanation:
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 Earth and the moon are kept in orbit by gravity and mass. Please select the best answer from the choices provided T F
Answer:
True
Explanation:
the Earth and the Moon are kept in orbit by gravity and mass.
Answer:
True (T)
Explanation:
Yeah, the Earth and the moon are kept in orbit by gravity and mass. Hence, this statement is True (correct).
What is a working copy of DNA and is read by organelles called?
Answer:
Working copy of DNA is RNA (Ribonucleic acid)
The nucleus controls all of the cell’s activities, such as growth and metabolism, using the DNA’s genetic information.
Answer:
messenger RNA (mRNA)
Explanation:
The working copy of the DNA is called messenger RNA (mRNA). Its ready by organelles such as ribosomes to manufacture amino acids to make proteins.
What is seed technology?why is still considered as one of the major subject in agriculture?
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
write paragraph about digestion of food in brief
Answer:
Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules so that they can be absorbed into the watery blood plasma. In certain organisms, these smaller substances are absorbed through the small intestine into the blood stream.
Explanation:
according to wikipedia!
Digestion is nothing but breaking down of substances into simpler forms, which the body can use. We eat many things and they have very complex compounds, our body cannot use these compounds. So, different parts of our digestive system breaks down different compounds to simpler forms, so that our body can use it for different functions.
Without replication, organisms could not successfully
move.
grow and reproduce.
feed.
make proteins.
Answer: grow and reproduce
Explanation:
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:
The bacterium Methylophilus methylotrophus can use methanol and ammonia for protein synthesis. The glutamate dehydrogenase gene from E. coli was introduced into M. methylotrophus using recombinant DNA techniques. Under high ammonia conditions, the introduction of the glutamate dehydrogenase gene into M. methylotrophus resulted in an increase in protein yield. Select the statements that are reasonable explanations for the increased protein yield in the modified M. methylotrophus. Glutamate dehydrogenase catalyzes the formation of glutamate and glutamine in a two-step process. Both glutamate and glutamine play a key role in amino acid synthesis, thus an increase in levels of glutamate and glutamine increase protein synthesis. Glutamate dehydrogenase has a low affinity for NH^+_4, and can only catalyze the formation of glutamate from alpha-ketoglutarate and NH^+_4, when the concentration of NH^+_4 is high. Glutamate dehydrogenase has a high affinity for NH^+_4, thus the rate of glutamate synthesis increases exponentially under high ammonia conditions. Glutamate is the amino group donor for most transamination reactions involving amino acids, thus an increase in glutamate concentration increases protein synthesis.
Answer:
- Glutamate dehydrogenase has a low affinity for NH+4, and can only catalyze the formation of glutamate from alpha-ketoglutarate and NH+4, when the concentration of NH+4 is high.
- Glutamate is the amino group donor for most transamination reactions involving amino acids, thus an increase in glutamate concentration increases protein synthesis.
Explanation:
Glutamate dehydrogenase (GLDH) is an enzyme found in prokaryotic and eukaryotic cells, which is known to catalyze the reversible oxidative deamination of glutamate (Glu) to alpha-ketoglutarate and ammonia at the same time the oxidation of NADH to NAD. In bacteria, this enzyme (GLDH) is efficient only at high concentrations of the ammonium cation (NH4+), because it has a low affinity for NH4+. Moreover, transamination is a pathway that involves the transfer of an amino group from one amino acid to a ketoacid in order to form new amino acids (this reaction is responsible for the deamination of most amino acids). Glu is the donor of amino groups in most of the reactions catalyzed by enzymes involved in the transamination between an amino acid and an alpha-keto acid. In consequence, in presence of GLDH, a high concentration of Glu will increase the production of new amino acids and therefore also protein synthesis.
number of cell that undergo meiotic division to produce a 216 gametes in gymnosperms is
meiotic devision this is the answer it might help you
Drag the tiles to the correct boxes to complete the pairs.
Match the mRNA sequences to their DNA sequences.
AUUACGCAU
CCGAAAUGU
GAUCAUUAC
UUUUUAACG
AAAAATTGC
arrowRight
GGCTTTACA
arrowRight
TAATGCGTA
arrowRight
CTAGTAATG
arrowRight
Answer:
mRNA sequence1=AUUACGCAU
DNA sequence1=TAATGCGTA
mRNA sequence2=CCGAAAUGU
DNA sequence2=GGCTTTACA
mRNA sequence 3=GAUCAUUAC
DNA sequence3=CTAGTAATG
mRNA sequence4=UUUUUAACG0
DNA sequence4=AAAAATTGC
A pea plant is heterozygous for both seed shape and seed color. S is the allele for the dominant, spherical shape characteristic; s is the allele for the recessive, dented shape characteristic. Y is the allele for the dominant, yellow color characteristic; y is the allele for the recessive, green color characteristic. A pure bred plant with green spherical shaped seeds is crossed with a pure bred plant with yellow dented shaped seeds. State the phenotype and genotype for the parent plants p1 and p2
Answer:
The correct answer is -
P1: SSyy
p2: ssYY
Explanation:
In the given question it is given that S is the allele for the dominant trait of spherical shape over s allele of dented shape and similarly Yellow pea seed is dominant over y green seed.
It is given that parent 1 or p1 is true breeding for green spherical shaped seeds which means it has two alleles of the same gene that are SSyy (S for spherical and y for green) and parent 2 or p2 is a pure bred plant with yellow dented shaped seeds that would be ssYY.
Answer true or false.
1._____The central nervous system consists of the brain, spinal cord, and nerves.
2._____The autonomic system is part of the nervous system that controls involuntary
actions in the body.
3._____A fish has a more highly developed brain than an ape.
4.______The spinal cord is part of the respiratory system.
5._____The three main parts of the brain in vertebrates are the cerebrum, the
cerebellum, and the brain stem.
Answer:
1. False
2. -----
3. False
4. False
5. True
I'm not sure of the 2nd question
Hope it helps:)
Which characteristic is unique to vertebrates?
A) they all have a well-defined skeleton
B) they have no defined organ systems
C) they have bilateral symmetry
D) they have an exoskeleton
Answer: They have well-defined skeleton.
Explanation:
This is because the vertebrates are uniquely characterised by the presence of the bones.
Answer:
Answer is A)They have a well-defined skeleton
Explanation:
most reasonable answer
What is a plant nucleus
Answer:
All plant cells contain a nucleus, a structure that stores DNA and acts as a cell's command center. It is surrounded by the nuclear envelope and is filled with nucleoplasm. ... DNA is copied during DNA replication for new cells, as well as copied to RNA to make proteins in the nucleus.
Dehydration synthesis leads to WICH formation
Answer:
Polymers...........
Explanation:
In a Nitrogen metabolism study, the following data were obtained over the test period:
Nitrogen consumed 175 grams
Total Fecal N 35 grams
Metabolic Fecal N 10 grams
Total Urinary N 80 grams
Endogenous Urinary N 10 grams
Calculate:
a. Apparent Nitrogen digestibility (%)
b. True Nitrogen digestibility (%)
c. Nitrogen Balance (g)
d. Apparent Nitrogen Retention (%)
Answer:
a. 80%
b. 86%
c. 60 g
d. 34.29%
Explanation:
From the given information:
The apparent nitrogen digestibility (AD) is the ratio of the difference between the consumed nitrogen and fecal nitrogen to the consumed nitrogen.
Mathematically:
[tex]AD = \dfrac{consumed \ nitrogen - fecal \ nitrogen }{consumed \ nitrogen }[/tex]
[tex]AD = \dfrac{175 -35 }{175}[/tex]
AD = 0.8
To percentage, the apparent Nitrogen digestibility = 80%
b. True Nitrogen digestibility is calculated by the formula:
[tex]=\dfrac{consumed \ nitrogen - (fecal \ nitrogen -metabolic \ fecal)}{consumed \ nitrogen}[/tex]
[tex]= \dfrac{175 -(35-10)}{175}[/tex]
[tex]= \dfrac{175 -25}{175}[/tex]
= 0.86
= 86%
c. Nitrogen Balance = consumed Nitrogen - Fecal nitrogen - total uninary
Nitrogen Balance = (175 - 35 - 80) grams
Nitrogen Balance = 60 g
d. Apparent Nitrogen Retention (ANR) is computed as follows:
[tex]ANR = \dfrac{(consumed \ nitrogen-fecal\ nitrogen - total \ uninary )}{nitrogen \consumed }\times 100\%[/tex]
[tex]ANR = \dfrac{(175-35- 80 )}{175 }\times 100\%[/tex]
[tex]ANR = \dfrac{(60 )}{175 }\times 100\%[/tex]
ANR = 34.29%
Which food has the greatest amount of polyunsaturated fat?
What is the complimentary dna strand for TCTTAAATGATCGAT
Answer:
AGAATTTACTAGCTA
Explanation:
The DNA strand pairs are:
Adenine (A) -- Thymine (T)
Cytosine (C) -- Guanine (G)
and vice versa.
The given strand:
TCTTAAATGATCGAT
Based on the given pairs above, your answer will be:
AGAATTTACTAGCTA
~
Z 00m 336"083"2553 (wZE2XQ)
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)
Consider the factors that affect muscular strength. Read each scenario and then identify each label into the appropriate category based on whether each would result in a stronger or weaker muscle contraction.
a. Potassium accumulate in the sarcoplasm
b. Increase in muscle belly circumference
c. Lesser proportion of motor neurons to muscle fibres
d. Begin contractions with muscle already 50% contraction
e. Lower sarcoplasm pH
f. Increased stimulus frequency.
g. Circular arrangement of muscle fascicles
h. increased requirement.
Answer:
1. Weaker contraction:
a. Potassium accumulate in the sarcoplasm
d. Begin contractions with muscle already 50% contraction
e. Lower sarcoplasm pH
g. Circular arrangement of muscle fascicles
2. Stronger Contraction
b. Increase in muscle belly circumference
c. Lesser proportion of motor neurons to muscle fibres
f. Increased stimulus frequency.
h. increased requirement.
Explanation:
Sarcoplasm refers to the cytoplasm of muscle cells which contains ATP, enzymes, and a variety of ions, including potassium (K+). The negative potential required during muscle activity is produced from the disequilibrium of ionic concentrations (mostly Na+ and K+) across the membrane, which is generated through Na+/K+ ATPase pumps. During contraction, a muscle shortens, and thus its circumference increases. The generation of lactic acid is known to lower pH in the sarcoplasm and thus hinder the force and power development of the muscle fibers. Muscle fascicles can be arranged in concentric rings, it is a common pattern in sphincter muscles that modulate the opening and closing of orifices (which have weak contractions). A motor unit refers to a single efferent neuron and all of the muscle fibers it modulates. Each individual muscle fiber is innervated by one motor neuron, whereas a single motor neuron can innervate many muscle fibers. Finally, higher intensity/frequency are known to induce stronger muscular contractions, but also produce a stronger decline in force and cause more rapid muscle fatigue.
How many kingdoms are there in the domain Bacteria?
O A2
OB. 1
O c. 3
O D. 4
Answer:
There is 1 kingdom in the domain Bacteria
Explanation:
Answer:
B. 1
Explanation:
one Kingdom
Domain Bacteria has one Kingdom: Kingdom Eubacteria.
How many kingdoms are there in the domain bacteria? | Study ...https://study.com › academy › answer › how-many-kingd...
