Answer:
Explanation:
There are at present 20 major amino acids produced in the body. These amino acids are important biological components in the body. They are the building blocks of proteins. Also essential in the synthesis of nucleotides including the DNA and RNA. There are different ways of classified these amino acids:
Essential and non essential. The essential amino acids cannot be synthesized from scratch in the body but has to be obtained from our diet, while non essential is produced by the body
Acidic, basic, neutral, polar, non polar etc.
The essential amino acids are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.
While the non essential amino acids are: alanine, asparagine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine.
In 1998, paleoanthropologist Rick Potts published an article in The Yearbook of Physical Anthropology, a peer-reviewed journal. The article was titled “Environmental Hypotheses of Hominin Evolution.” In his paper, Potts claimed that great variations in environmental conditions over time were responsible for the adaptability of humans and the success of our species. Which would most likely be found in his paper? a review of modern human anatomical structure evidence of changing environmental conditions, with references the reasons competing hypotheses are wrong his opinion of what will happen to the survival of the human race
Answer:
Dr. Potts used environmental data to support environmental hypotheses capable of explaining human evolution
Explanation:
In this paper, the author stated that environmental factors have been fundamental for the emergence of adaptive traits during human evolution. In consequence, Dr. Potts explained how particular environmental factors and habitats might have shaped human evolution. For example, it has been hypothesized that dry savanna vegetation might have been a key environmental factor associated to the emergence of human traits including, among others, bipedality, making of tools from stones, the development of human brains, etc. In order to prove this hypothesis, the author recorded environmental data from different regions in Africa (Olorgesailie, Olduvai, Turkana, Zhoukoudian, etc), where it is believed that first hominids evolved about 6-8 million years ago.
ITS NOT B AND ITS NOT C
SOOO EITHER D OR A
Explanation
Larry recalls his first memory of riding a red tricycle at the age of 4. Larry’s memory is: True False
Answer:
True
Explanation:
False memory refers to remembering an event differently from the way it happened or remembering events that never happened at all.
Larry's memory is a true memory because it doesn't sound like something that could be made up. Also, most children ride tricycles around the age of 4 or even younger.
Hope that helps.
Ostriches can evade predators by running away on their powerful legs.
Please select the best answer from the choices provided
T
F
Answer:
True
Explanation:
When threatened, ostriches run away, but they can cause serious injury and death with kicks from their powerful legs. Contrary to popular belief, ostriches do not bury their heads in sand to avoid danger. This defensive behavior of lying low, so that they may appear from a distance to have their head buried.
) Recall what you know about crossing over, independent assortment, and random joining of sex cells during sexual reproduction.
Answer:
Crossing over is the process of interchange of genetic information among non-sister chromatids of homologous chromosome pairs during meiosis (specifically during synapsis in prophase I). During this process, the synaptonemal complex enables the interchange of chromosome fragments between non-sister chromatids through crossing over. Moreover, in sexual reproduction, the zygote diploid cell can be generated by the random joining of fully differentiated haploid gametic cells (male and female gametes). The combination of random joining with the phenomenon of crossing over is known to considerably increase the genetic variation of the resulting offspring. After zygote formation, the successive cycles of cell divisions during embryonic development will develop an organism that during its adult stage will reproduce via sexual reproduction.
In pea plants, purple flower color, C, is dominant to white flower color, c. The table shows the frequencies of the dominant and recessive alleles in three generations of peas in a garden. Allele Frequency for Flower Color in Peas Generation p q 1 0.60 0.40 2 0.64 0.36 3 0.75 0.25 4 0.80 0.20 Which generation showed the greatest frequency of having one of each allele? generation 1 generation 2 generation 3 generation 4
Answer:
generation 1
Explanation:
The allele frequency is a term that represents the frequency that an allele can appear in a given population. This term can help to develop conclusions about the genetic diversity that a region presents in relation to the individuals that compose it.
In relation to the question above, generation 1 had the highest frequency of having one of each allele. This is because this generation presents the maximum frequency of the dominant and recessive alleles in a coherent way, 0.60 and 0.40. However, the other generations showed a steady and progressive decrease in the recessive allele.
Answer:
Gen 1 or A
Explanation:
Please give me brainliest I need l need to level up.
Is your prediction supported by the membrane potential chart?
Answer:
The membrane potential of a resting neuron is primarily determined by the movement of K+start text, K, end text, start superscript, plus, end superscript ions across the membrane. ... Zero voltage across the membrane, as measured by a voltmeter with one electrode inside and one electrode outside the cell.
Answer:
Yes, it is. The chart shows that the initial charge of the neuron is negative. When the neuron is stimulated, sodium ions enter the cell. So, the voltage inside the cell changes to positive. When potassium ions move outward, the voltage decreases until it reaches its previous state.
Explanation:
You are a graduate student in the lab of a famous fly geneticist. You need to analyze a batch of mutant flies that were recently created in her laboratory to identify the single gene that is most likely mutated in each of the flies. Drag the mutations on the left to the appropriate blanks on the right to complete the sentences.
a. knirps (a gap gene)
b. hunchback (a gap gene)
c. hedgehog (a segment-polarity gene)
d. wingless (a segment-polarity gene)
e. kruppel (a gap gene)
f. even-skipped (a pair-rule gene)
1. Mutant fly F has predominantly lost abdominal structures, which is likely the result of a mutation in_____.
2. The wings are missing in mutant fly L, which is likely the result of a mutation in______.
3. Thoracic and abdominal structures are missing in mutant fly Q. The gene most likely responsible for this mutation is______.
4. Segment-sized sections of every other segment are missing in mutant fly Z. One likely candidate gene is_______.
5. Mutant fly X has lost the head and thorax. The gene most likely responsible for this mutation is_______.
6. The mutation observed in mutant fly O resulted in defects within the anterior or posterior regions of each segment. The gene that most likely caused this mutation is_______.
Answer:
knirps (a gap gene)
wingless (a segment-polarity gene)
kruppel (a gap gene)
even-skipped ( a pair-rule gene)
hunchback (a gap gene)
hedgehog (a segment-polarity gene)
Explanation:
The gap, segment-polarity and pair-rule genes play central roles in controlling embryonic development of arthropods. In the first place, the gap genes are associated with the formation of contiguous body segments, thereby mutations in these genes result in gaps in the normal body plan of the embryo. For example, in Drosophila melanogaster, mutations in the knirps, Krüppel and hunchback genes result in deletion of body segments. These genes are also known to regulate segment polarity genes, which determine the polarity of the embryonic parasegments by modulating Wnt and Hedgehog signaling pathways. Finally, the pair-rule genes work together with gap genes to control embryonic development of alternating body segments.
what is the importance of autotrophic organisms for other organisms?
Answer:
the importance of autotrophic organisms with respect to energy flow and nutrient cycling in ecosystems. Primary producers usel solar or chemical energy to manufacture their own food and they use this energy through cellular respiration and growth and reproduction--energy used for NPP.
The Lannister’s family went to bed one frigid winter night and were found deceased the next day. A squirrel’s nest was found in their chimney. What happened to the Lannisters?
Answer:
They died due to suffocation.
Explanation:
The whole Lannister’s family died due to the shortage of oxygen in the room because of squirrel’s nest in the chimney. Chimney is the only way for the removal of toxic gases and smoke produced from the burning of wood. The squirrel’s nest block the passage and the smoke and toxic gases stay in the house which causes suffocation and the whole Lannister’s family died.
Which of these lymphoid organs destroys bacteria before it can breach the intestinal wall and generates "memory" lymphocytes for long-term memory?
Answer:
Peyers patches
Explanation:
Peyers patches are group of lymphoid follicles found in the ileum of the small intestine.
This part of lymphatic system form part of immune system that help to control bacteria population in the small intestine and prevent the growth of pathogenic bacteria in the small intestines. It plays an important role in immune surveillance where it recognises pathogenic bacteria and destroy the bacteria.
It is a lymphoid organs destroys bacteria before it can breach the intestinal wall and generates "memory" lymphocytes for long-term memory because it form the part of the immune system which help to fight infection or foreign substances in the body, also by generating lymphocytes which is a white blood cells of the immune system which generate long term memory of foreign pathogens and destroying it.
Which of the following is a human-related release of greenhouse gases?
O A. Wild animal respiration
OB. Volcanic eruptions
O C. Intensive agriculture
O D. Solar cycles
It’s A
Answer:
C
Explanation:
I'm pretty sure it's actually C and not A. It's asking for human-related release from greenhouse gases. Humans don't cause volcanic eruptions and aren't in control of wildlife's respirations. The solar cycles has to do with the magnetic flux that rises to the surface of the sun and lasts 11 years. Intensive agriculture increases pollution which harms the environment.
What are some changes that can occur in ecosystems?
Answer:
There are so many changes that occur in ecosystem, they are:Habitat change. climate change. invasive species. over exploration. pollution.Explanation:
Hope it helps you.Seasons, tide cycles, population sizes, landscape changes, succession evolution, and climate change are instances of changes that can occur in ecosystems.
What is an ecosystem?An ecosystem is a geographical area wherein plants, animals, and other organisms, along with weather and landscape, coexist to form a life bubble.
The instances of changes that can occur in ecosystems can be seasons, tide cycles, population sizes, landscape changes, succession evolution, and climate change.
Thus, these are some changes that can occur in the ecosystem.
For more details regarding the ecosystem, visit:
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During which period did humans first appear on Earth? Quaternary Neogene Paleogene Cenozoic
Answer:
the answer is actually Quaternary, please double check your answer before giving them out to people
we dont want them to get a bad grade
Explanation:
i took the test
E2020
Saliva is released by __________ and it acts on _______.
Answer:
Salivary glands, food
Explanation:
Salivary glands release saliva, and it acts on the food and turns into a soft pulpy mass called bolus. Bolus is the simplier form of food which helps in digestion of complex food.
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Answer:
salivary glands, food
Explanation:
Saliva is released by salivary glands and it acts on food.
Salivary glands produce saliva. The saliva acts on food and creates a soft lump called bolus during the chewing process.
New mutations can also occur randomly, so there’s a chance that children of parents who didn’t inherit the gene for Huntington’s can develop a mutation in the gene that causes Huntington’s disease explain how protein synthesis contributes to the symptoms of the disease
Answer:
It depends on the mutation rate
Explanation:
Mutations are genetic changes that occur naturally by errors during DNA replication which are not repaired by the DNA repair mechanisms. When a mutation occurs in the germline line, it may pass to the next generations and thus perpetuate itself. Huntington's disorder is an autosomal dominant disorder associated with a trinucleotide repeat mutation in the huntingtin (HTT) gene localized on chromosome 4, which encodes the Huntingtin protein. It has been shown that the high levels of Huntingtin are linked to Huntington's disorder, thereby it is believed that this mutation might be associated with a higher expression of the HTT gene.
Which of the following statements best describes the role of hormones in the body? Hormones send chemical signals throughout the body to regulate body processes.
Answer:
Hormone production and release are primarily controlled by negative feedback. In negative feedback systems, a stimulus elicits the release of a substance; once the substance reaches a certain level, it sends a signal that stops further release of the substance. In this way, the concentration of hormones in blood is maintained within a narrow range. For example, the anterior pituitary signals the thyroid to release thyroid hormones. Increasing levels of these hormones in the blood then give feedback to the hypothalamus and anterior pituitary to inhibit further signaling to the thyroid gland, as illustrated in Figure 18.14. There are three mechanisms by which endocrine glands are stimulated to synthesize and release hormones: humoral stimuli, hormonal stimuli, and neural stimuli.
Explanation:
Hyperthyroidism is a condition in which the thyroid gland is overactive. Hypothyroidism is a condition in which the thyroid gland is underactive. Which of the conditions are the following two patients most likely to have?
Patient A has symptoms including weight gain, cold sensitivity, low heart rate and fatigue.
Patient B has symptoms including weight loss, profuse sweating, increased heart rate and difficulty sleeping.Humoral Stimuli
The term “humoral” is derived from the term “humor,” which refers to bodily fluids such as blood. A humoral stimulus refers to the control of hormone release in response to changes in extracellular fluids such as blood or the ion concentration in the blood. For example, a rise in blood glucose levels triggers the pancreatic release of insulin. Insulin causes blood glucose levels to drop, which signals the pancreas to stop producing insulin in a negative feedback loop.
Hormonal stimuli refers to the release of a hormone in response to another hormone. A number of endocrine glands release hormones when stimulated by hormones released by other endocrine glands. For example, the hypothalamus produces hormones that stimulate the anterior portion of the pituitary gland. The anterior pituitary in turn releases hormones that regulate hormone production by other endocrine glands. The anterior pituitary releases the thyroid-stimulating hormone, which then stimulates the thyroid gland to produce the hormones T3 and T4. As blood concentrations of T3 and T4 rise, they inhibit both the pituitary and the hypothalamus in a negative feedback loop.
The statement that describes the role of hormones in the body is Enzymes reduce the activation energies of biological reactions.
What are hormones?Hormones are chemicals that are secreted by the two glands, endocrine and exocrine glands.
Endocrine glands secrete hormone directly into the bloodstream, and exocrine glands are secrete hormones into ducts.
The options are attached here:
A.Enzymes aid biological reactions by providing more reactants.B.Enzymes aid biological reactions by removing products quickly.C.Enzymes raise the temperature in a cell to speed up biological reactions.D.Enzymes reduce the activation energies of biological reactions.E.Enzymes reduce the energy of products in biological reactions.Thus, the correct option is D.Enzymes reduce the activation energies of biological reactions.
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Please help!!!!! science, please explain in sentence cause yes i don’t know where to find these answers !
Answer:
1. DNA replication.
2. rRNA - is called the ribosomal RNA which serve as structural components of protein-making structures known as ribosomes.
mRNA - is called the messenger RNA which serve as temporary copies of the information found in DNA.
tRNA - is called transfer RNA, that ferry amino acids to the ribosome to be assembled.
3. Protein synthesis.
Explanation:
Hope it helps.
A pharmaceutical company is working on a drug to slow the spread of Ebola. Which of the following should be the company's focus?
a. Sanitizing the drinking water
b. Protecting the food supply
c. Person-to-person contact
d. Killing the insect vector
Answer:
C
Explanation:
Although Ebola isn't transferred by the air and through touch. Bodily fluids like sweat, saliva, urine, breastmilk, semen, and vomit all transmit the disease, if a person gets it in a cut or is directly introduced by it (sexual intercourse.)
If a small drop of tiny particles such as pollen grains are dropped into a drop of water on a microscope slide, they will appear to vibrate and spread out. The primary reason for this is
Answer:
The primary reason is that the pollen grains are being struck by water molecules that move in different directions. These strikes fluctuate and sometimes are uneven.
Explanation:
This vibration and spread out of molecules in water is called Brownian Motion. It is the result of the collision of small particles of water with big particles of pollen. As the particles of water move randomly hitting different sides of the pollen particle, at times, there will not be a coordinated movement, but as the movement of water particles is random, there will be moments when one side of the pollen particle will collide with more water particles, when this happens there is an unbalanced force that makes the pollen particle moves in a direction.
16. Figure it shows the digestive system
С
D
Answer:
Is there any picture or diagram to go with this question?
The spread of cancer cells from one site to others in the body is known as _____.
Answer:
metastasis
Explanation:
Metastasis is the process in which cancer cells break away from the place where they first formed and travel through the bloodstream to other parts of the body where they form a new tumor.
Hope that helps.
Which examples show repair or replacement of damaged cells? a scrape being healed scars forming where a cut once belonged skin flaking off your arm in the winter
Answer:
Its A & B
Explanation:
a scrape being healed
scars forming where a cut once belonged
Answer:
A and B
Explanation:
i got it right on edge-
how do animals reproduce..can someone explain in detail please
Answer:
Asexual reproduction in animals occur through fission, budding,e.t.c.
Sexual reproduction starts with the combination of a sperm and egg which is called FERTILISATION.
Explanation:
The reproductive parts in animals produce gametes that fuse and form ZYGOTE.
Okay, hope it helps.
Answer:
[tex]\boxed{\mathrm{view \: explanation}}[/tex]
Explanation:
Animals should be matured to reproduce.
The animals can reproduce sexually, that involves fusion of sperm and ova inside the body.
Few animals can also reproduce asexually, asexual reproduction does not involve the fusion of gametes, the genetic material is combined to produce an offspring that has inherited the genes of the parent.
g 1 molecule of glucose is catabolized to pyruvate and then acetyl-coA. All the acetyl-coA enters the citric acid cycle. How many molecules of NADH are produced from the citric acid cycle only (do not include NADH from glycolysis or the pyruvate dehydrogenase complex in your calculation.) You must answer as a number i.e if you think the answer is 12, you must enter 12, not twelve.
Answer:
6NADH
Explanation:
In the kreb's cycle NAD is reduced during the reduction of 6-carbon citrate to 5 carbon Alpha-Ketoglularate.
The second is produced during the conversion of 5carbon alpha ketoglutarate to succinate. Lastly in the conversion of fumirate to oxoloacetate;another NADH is formed.
However, since two pyruvate enters the Kreb's cycle therefore 6NADH(three NADH per cycle of Citric) are produced for each molecule of glucose that is broken down from glycolysis.
Remember,each glucose molecule goes through 2 cycles of Kreb.
Futhermore co-enzyme FADH2 are also produced,with 2 molecules per 1 glucose.
These Co-ezymes transfer hydrogen ions,into the matrix of the mitochondria,where is is splits to protons and electrons.
The electrons formed the ETC,which produce PMF for transporting protons into the intramembranes for electrochemical gradients needed to generate energy for ATP s synthesis,by ATP synthase.
.
Is Natural law theory is inconsistent with a theory of human rights. True / False
Answer:
i think that it's false.
Explanation:
Natural law is a theory in ethics and philosophy that says that human beings possess intrinsic values that govern our reasoning and behaviour. Natural law maintains that these rules of right and wrong are inherent in people and are not created by society or court judges.
The Interests Theory Approach. Advocates of the interests theory approach argue that the principal function of human rights is to protect and promote certain essential human interests. Securing human beings' essential interests is the principal ground upon which human rights may be morally justified.
The general function of an enzyme in the body is to ________. The general function of an enzyme in the body is to ________. eliminate waste products from the blood act as a reactant in carbohydrate storage catalyze chemical reactions maintain homeostasis maintain a neutral pH
Answer:
catalyze chemical reactions
Explanation:
An enzyme is a proteinous substance that acts as biological catalysts and increases the rate of biochemical reactions in the body. Enzymes are specific in nature which is as a result of the structure/shape of its building block (amino acid).
Enzymes speedens the rate of a chemical reaction in living systems, which would normally not occur or occur at a much slower rate, without the presence of an enzyme. Enzymes acts on the reactants called Substrates by binding to them to form products but they are not used up in the reaction. Hence, enzymes are not reactants.
I neeed help pls answe them plssss
Answer:
Autosomal dominant and recessive: Autosomal dominant states a pattern of inheritance in which an individual carries one normal gene and one copy of a mutant gene while autosomal recessive states a pattern of inheritance in which an individual have two copies of the mutant gene.
Incomplete dominance: Incomplete dominance states a heterozygous condition in which both the alleles present are partially expressed and produces intermediate phenotype.
Codominance: In codominance and individuals receive alleles, if both the alleles are different including dominant and recessive, dominant allele will be expressed while recessive will be masked.
Multiple alleles: organisms with multiple alleles exist with two copies of every gene present in a population with variation in genes.
Sex linked gene: In humans and some other organisms, sex linked genes are influenced by genes on the X chromosome. for example: If a gene is present on the X chromosome only and not the Y chromosome.
You go to the circus and see the tiger show. When the trainer cracks his whip, the tiger jumps through the hoop. This is an example of
a. operant conditioning with a positive reenforcement
b. operant conditioning with negative reenforcement
c. operant conditioning with punishment
d. none of the above
Answer:
C
Explanation:
the trainer has already threatened and hit the tiger before.
thus, when he cracks the whip, the tiger is afraid and will "volunteeringly" jump through the hoop.
the defination of operant conditioning with punishment is any change in a human or animal's surroundings which, occurring after a given behavior or response, reduces the likelihood of that behavior occurring again in the future.
why the swimmer push the water backward
Answer:
[tex]\boxed{\mathrm{view \: explanation}}[/tex]
Explanation:
Swimmers push water backwards to propel forwards. In other words, swimmers push their hands and legs against water to move forward. This is stated in the third law of motion, for every action, there is an equal and opposite reaction.
Phytoplankton, shown on the left in the image below, are microscopic organisms that can be found in freshwater and salt water environments. They perform photosynthesis to get energy and act as an important food source for larger organisms, such as the whale that is shown on the right. Phytoplankton A large whale. Which characteristic describes the whale but not its food source, the phytoplankton? The whale is heterotrophic. The whale has cell walls. The whale is unicellular. The whale is a prokaryote.
Answer:
The whale is heterotrophic.
Explanation:
Energy is needed by organisms to perform their life functions. Organisms, in nature, feed on one another for energy source. Some organisms are, however, capable of synthesizing their own food or energy source via a process called photosynthesis. This is the case of the phytoplankton in the question. These organisms are, therefore, called AUTOTROPHIC ORGANISMS or PRODUCERS.
On the other hand, some organisms are incapable of this self-production of energy source. Hence, they rely on other organisms for it. These category of organisms are called HETEROTROPHIC organisms, which is the category the large whale fall into due to its dependence on phytoplankton for energy source.