Answer:
Leaf are usually flattened green extension from the stem of a vascular plant.
a) Leaves functions :
- primary sites of photosynthesis and produces food for plants.
- leaves are an essential part of stem system and connect through vascular system to the rest of the plant so that free movements and exchange of nutrients, water and end products of photosynthesis.
b) leaves are differentiate into three types of tissues: dermal tissue, vascular tissue, and ground tissue. Dermal tissue protects the plant, and controls gas exchange in leaves, vascular tissues helps in translocation of nutrients and water.
A mutation causes a sequence of DNA that has the nucleotides TTG to be changed to TCG. The resulting protein has a different sequence of amino acids. Which type of mutation is this?
Answer:
subtitution mutation
Explanation:
The T in the middle is subtituted with C.
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Answer:
The answer is A, missense.
Explanation:
What does environmental quality refer to? Environmental quality refers to the quality of the total environment, including both the natural and the environment.
Answer:
True,
An animal requires, Food, Water, Shelter as basics of life - but I add a third, for social animals; a Mate, Young, or Flock/Herd/Group
A biologist at World University used Procedure IV to conduct an additional study and found the sequence following below. Using your knowledge of central dogma generate the amino acid sequence that results from this sequence. Given DNA sequence: CAC GAC GGA TTC GTA
Answer:
Valine-Leucine-Proline-Lysine-Histidine
Explanation:
The central dogma of biology is the process by which DNA is used to synthesize RNA and subsequently amino acid sequence (PROTEIN). The processes of transcription and translation is used in gene expression. Transcription is the process whereby the information encoded in a DNA molecule is used to synthesize a mRNA molecule. Transcription is catalyzed by RNA polymerase enzyme, which uses complementary base pairing rule i.e Adenine(A)-Thymine(T), Guanine(G)-Cytosine(C) pairing.
N.B: Thymine is replaced by Uracil in the mRNA
For the above DNA sequence: CAC GAC GGA TTC GTA, the mRNA sequence will be: GUG CUG CCU AAG CAU
Translation is the second process of gene expression which involves the synthesis of an amino acid sequence from an mRNA molecule. The mRNA is read in a group of three nucleotides called CODON. Each codon specifies an amino acid (see attached image for genetic code)
Based on the attached genetic code, an mRNA sequence: GUG CUG CCU AAG CAU will encode an amino acid sequence: Valine(Val) - Leucine (Leu) -Proline (Pro) -Lysine (Lys) - Histidine (His).
GUG specifies Valine amino acid
CUG specifies Leucine amino acid
CCU specifies Proline amino acid
AAG specifies Lysine amino acid
CAU specifies Histidine amino acid
When The central dogma generates the amino acid sequence that results from this sequence is: Valine-Leucine-Proline-Lysine-Histidine
What is a DNA sequence?
When The central dogma of biology is the process by which DNA is used to synthesize RNA and also subsequently amino acid sequence (PROTEIN). Then The processes of transcription and also translation is used in gene expression. Transcription is the process whereby the transmission encoded in a DNA molecule is useful to synthesize an mRNA molecule. Transcription is catalyzed by RNA polymerase enzyme, which operates complementary base pairing rule i.e Adenine(A)-Thymine(T), Guanine(G)-Cytosine(C) pairing.
Then, N.B: Thymine is replaced by Uracil in the mRNA
After that, For the above DNA sequence: CAC GAC GGA TTC GTA, the mRNA sequence will be: GUG CUG CCU AAG CAU
The translation is the second procedure of gene expression which
implicates the synthesis of an amino acid sequence from an mRNA molecule. When The mRNA is read in a group of three nucleotides called CODON. Individually codon identifies an amino acid (see attached image for genetic code)
Established on the connected genetic code, an mRNA sequence: GUG CUG CCU AAG CAU will encode an amino acid succession: Valine(Val) - Leucine (Leu) -Proline (Pro) -Lysine (Lys) - Histidine (His).
Then, GUG specifies Valine amino acid
Now, CUG specifies Leucine amino acid
After that, CCU specifies Proline amino acid
Then, AAG specifies Lysine amino acid
Now, CAU specifies Histidine amino acid
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Classify the following organisms into their respective kindoms 1.yeast 2.penicillium 3.rhizobium 4.mushroom 5.amoeba 6.fish
Answer:
1.fungi, 2.fungi 3.monera 4.fungi 5. protista 6. animalia
Explanation:
since, yeast is a fungus , penicilium and mushroom (agaricus) also fall under this catergory due to the presence of mysceliom and hyphae.
rizobium is a bacteria so falls under the kingdom monera
amoeba has locamotory organs hence is a part of the protista kingdom
while , fish is an animal and thus belong to animalia
For each of the following classes of proteins, give two examples of specific proteins.
a. Enzymes
b. Structural proteins
c. Motility proteins
d. Regulatory proteins
e. Transport proteins
f. Receptor proteins
g. Defensive proteins
h. Storage proteins
Answer:
Answered below
Explanation:
A) Amylase, a protein enzyme that catalyses the hydrolysis of carbohydrates and trypsin, a protein enzyme that catalyses the digestion of protein.
B) Keratin, a protein which is found in hair, and Collagen, a protein which is found in connective tissues such as tendons and ligaments.
C) Myosin and tropomyosin
D) cyclin-dependent kinase and p53
E) GLUT1 and Auxilin
F) Receptor tyrosine kinase and Integrin
G) Immunoglobulins (antibodies) and fibrinogen
H) Ferritin and Casein
Which statement is best supported by the data in the graph? A graph entitled Number of people living with H I V, number of people newly infected with H I V and number of AIDS deaths worldwide from 1990 to 2008 in millions is shown. Year is on the horizontal axis and number of people is on the vertical axis. The number of people living with H I V steadily increases over the years. The number of people newly infected increased from 1990 to 1996 and then began to decrease. The number of deaths due to AIDS increased from 1990 to 2002, and then began to level off and decrease. Since 2000, there has been an increase in the number of people living with HIV, but a decrease in the number of people newly infected with HIV. Since 1990, both the number of new HIV infections and the number of deaths due to AIDS has consistently increased. The life span of a person living with HIV has become shorter. Twice as many people were living with HIV in 2008 than in 2000.
Answer: A. Since 2000, there has been an increase in the number of people living with HIV, but a decrease in the number of people newly infected with HIV.
Explanation:
The statement "Since 2000, there has been an increase in the number of people living with HIV, but a decrease in the number of people newly infected with HIV" best supported by the data in the graph. Hence, option A is correct.
What is HIV?The virus known as HIV (human immunodeficiency virus) targets the immune system of the body. HIV can cause AIDS (acquired immunodeficiency syndrome) if it is not treated. Right now, there is no efficient treatment.
Nevertheless, since 1996, there have been fewer new infections. For this reason, we can assume that if we look at the year 2000, we will observe that there was a rise in the number of HIV-positive persons but a decline in the number of HIV-positive people.
Therefore, since 2000, there has been an increase in the number of people living with HIV, but a decrease in the number of people newly infected with HIV.
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The given question is incomplete, so the most probable image of the question is attached below.
Which of the following does NOT contribute to bacteria's large diversity Small size, Ability to reproduce quickly, Diverse habitats, None of the above
narrowing of the coronary arteries due to buildup of debris along the artery
Answer:
The correct answer is coronary artery disease.
Explanation:
The narrowing of blockage of the coronary arteries, generally resulting due to atherosclerosis is known as coronary artery disease. Atherosclerosis also is known as the clogging or hardening of the arteries and is the accumulation of fatty deposits and cholesterol on the artery's inner walls.
These fatty deposits of plaques can prevent the flow of the blood to the muscles of the heart by physically choking the artery or by resulting in unusual artery function and tone. In the absence of a sufficient supply of blood, the heart becomes deficient of the essential nutrients and oxygen it requires to function appropriately. This can further result in angina or chest pain.
Complete the following paragraph to describe how mRNA is formed and processed during transcription. Responses can be used more than once
messenger RNA
exons
transcripion
nucleus
poly-A
cap
RNA ribosomal
prokaryotes
RNA polymers
cytoplasm
Transcription begins in the nucleus when _________ unzips a DNA molecule.
RNA nucleotides align themselves to complementary base pairs and in this manner___________ is formed.
IN___________ must be processed before it leaves In the nucleus.
One end is modified with the addition of a____________ and the other end is modified with the addition of a ________tail. Some sections called ___________are edited out, leaving only___________remaining.
Then, the ____________leaves the nucleus and enters the cytoplasm where it awaits the process of_____________.
Answer:
Transcription begins in the nucleus when RNA polymerase unzips a DNA molecule.
RNA nucleotides align themselves to complementary base pairs and in this manner messenger RNA is formed.
In eukaryotes must be processed before it leaves In the nucleus.
One end is modified with the addition of a cap and the other end is modified with the addition of a poly-A tail. Some sections called introns are edited out, leaving only exons remaining.
Then, the messenger RNA leaves the nucleus and enters the cytoplasm where it awaits the process of translation
Explanation:
Transcription is the process in which DNA becomes RNA. In this protein synthesis, transcription occurs in the nucleus while translation in the cytoplasm. In the first one, which is transcription, a messenger RNA is produced. In the seceond one, an amino acid sequence is produced in the ribosomes.
*Take into account there were two options missing that I added because they were the only correct answer. "In eukaryotes must be processed before it leaves In the nucleus" the only right answer is eukaryotes, because prokaryotes don't have nucleus. The other situation was in "Then, the messenger RNA leaves the nucleus and enters the cytoplasm where it awaits the process of translation" the only option given was "transcription". The right answer is "translation" because this one occurs in the cytoplasm, and transciptrion in the nucleus.
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.
Would any of these genotypes affect your species’ survival in its natural habitat? Explain why or why not.
Hello. You did not enter the answer options, but I can help you by saying that a genotype would affect the survival of a species in its natural habitat if that genotype establishes a disadvantageous characteristic for that habitat.
For example: We know that the Arctic foxes have genotypes that allow them to have a white color very advantageous for their natural habitat. That's because the white color, makes the fox camouflage itself in the environment surrounded by snow and equally white. This allows the fox to go unnoticed by possible predators, that is, its genotype favors the survival of the species. On the other hand, if the arctic fox genotype established a red color in the animal, it would affect its survival, in relation to its natural habitat. This is because it had not allowed the animal to camouflage itself in the environment, leaving it exposed to predators.
Research suggests that mitochondria and chloroplasts are modern-day descendants of ancient prokaryotes that were engulfed by ancestral eukaryotes. DNA is present in both of these organelles, which represents the only location for DNA in a eukaryotic cell outside of the nucleus. Briefly explain how this DNA evidence strongly supports this theory of endosymbiosis.
Answer:
Explanation:
Mitochondria and Chloroplast contain some Ribosomes which are different from the cytoplasmic ribosomes,These were measured to be 80s,while the Mitochondria and Chloroplasts are 70s.
Furthermore smaller circular DNA were found in theses two organelles,(which are the first DNA outside nucleus).These DNA types are the exact forms found in bacteria.
Thus, it was concluded that if these organelles could contained these genetic materials,they must be bacterial.Therefore chloroplast and mitochondria were ancient bacterial which now live in a mutual exclusive relationships in the larger cells of Eukaryotas(plant and animals).This is the basis of Endosymbiont theory.
That is these organelles live inside(Endo) new host in symbiosis or beneficial association with one another (symbiont).
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Answer:
Parasitic Relationship
Explanation:
Symbiotic relationship:
is a term that defines an interaction between organisms of different organisms.
Parasitic Relationship:
A relationship in which one organism is benefited and one is not.
Example: A tapeworm living at the gastrointestinal parts.
Mutualistic Relationship:
A relationship in which both organisms benefit.
Example: Egyptian plover bird and the crocodile.
Commensal Relationship:
A relationship in which both organisms are not benefited nor harmed.
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Your old roommate is in Australia on a one-year study abroad program. She excitedly Skypes you and says her friend mentioned an australopithecine skull he discovered while on a trip in the desert. The skull has a small brain and shows some wear on the tip of the canines. What correct information could you give in response?
Answer:
Explanation:
[tex]\neq \neq \neq \neq \neq \neq \leq \left \{ {{y=2} \atop {x=2}} \right. \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right][/tex]
what is the effect of the bio geochemical Cycles
Answer:
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Explanation:
Human activities have greatly increased carbon dioxide levels in the atmosphere and nitrogen levels in the biosphere. Altered biogeochemical cycles combined with climate change increase the vulnerability of biodiversity, food security, human health, and water quality to a changing climate.
Organize the levels of classification listed below in descending order.
a. Order
b. Genus
c. Phylum
d. Species
e. Class
f. Domain
g. Kingdom
h. Family
Answer:
f. Domain
g. Kingdom
c. Phylum
e. Class
a. Order
h. Family
b. Genus
d. Species
In fruit flies the allele for red eyes, R, is dominant. Witch genotype represents a white eyed male fruit fly
Answer:
rr
Explanation:
Dominant alleles will always be visible on a creature if they are at all present, such as with brown eyes in humans (i.e. Rr or RR). People with blue eyes (or fruit flies with white eyes) possess two recessive alleles (rr), which is the only way for a recessive trait to be present.
In fruit flies, the allele for red eyes, R, is dominant. Which genotype represents a white-eyed male fruit fly?
The answer is XrXr
which type of stem cells are most limited in differentiation
Answer:
Stem cells are the every organ and tissue that in your body.
Explanation:
The Stem cell are the many different types of the place in the body part they all are time in lives different .Stem cells are the fetal development during in the body.
Stem cells are very different and critical abilities, cells very widely that can not do certain things.
There are many types of cells in their:- Tissue specific cells ,
Embryonic cells, Induced stem cells.
Tissue specific cell:- This types of cell are more specialized the Embryonic cells.
Embryonic stem cell:- This types of cell are obtained the inner cell in the human forms, this cells retain in the special laboratory conditions.
Induced cell:- This types of cell are developing and testing drugs.
Why can some ions move across membranes but others cannot
Answer:
because the membranes are selectively permeable.
Explanation:
Meaning it only allows certain ions to move across.
14. Which of the following may produce more than one functional protein
from an mRNA transcript?
a. chromatin condensation c. epigenetics
h transcrintional regulation d. alternative mRNA processing
Answer:
D. Alternative mRNA processing.
Explanation:
A sequence of DNA ( 3' CCTCCGATGA 5' ) is used as a TEMPLATE strand for dideoxy sequencing. The products are made and the products are run in 4 different lanes (labelled "A", "G", "C", and "T") of an electrophoretic gel. Which lane will contain the product that ran furthest down the gel
Answer:
The reaction with adenine dideoxynucleotides will run furthest in the gel
Explanation:
In dideoxy sequencing (also known as Sanger sequencing), the DNA template is used to run four different reactions in which only one class of dideoxynucleotide (ddNTP) is added. These four different ddNTPs (i.e., ddATP, ddCTP, ddTTP or ddGTP) act as terminators during DNA synthesis. Moreover, the additional factors required for DNA synthesis including standard deoxynucleotides (dNTPs), DNA polymerase and site-specific primers are added in equal volumes to prepare these four different reactions. Thus, during electrophoresis, the sizes of the DNA bands will depend on the specific ddNTP used in each reaction. In this case, the reaction containing ddATP (capable of terminating DNA synthesis at the 5' end) will run furthest in the gel.
Drag each tile to the correct box. Lucia is walking barefoot in her yard. She accidentally steps on a nail. How will her nervous system work to generate a reaction? Arrange the events chronologically. Interneurons relay the impulse to motor neurons in the spinal cord. She immediately moves her foot. The sensory neuron generates an impulse. Receptors in her toe receive stimuli. Motor neurons signal the leg muscles. ↓ ↓ ↓ ↓
Answer:
In order of steps we have
Receptors in her toe receive stimuli
The sensory neuron generates an impulse.
Interneurons relay the impulse to motor neurons in the spinal cord
Motor neurons signal the leg muscles.
She immediately moves her foot.
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The terms ________ and immunoglobulin are often used interchangeably. They are found in the blood and tissue fluids, as well as many secretions.
Answer:
the answer is antigen.
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:
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Which of the following is a proposed answer to a scientific question?
hypothesis is proposed answer to a scientific question.
hope this answer is correct ..
felice has a scar on her arm that happened when she broke a glass at the age of 3. at the age of 8, she asked her mom why she has a scar, and her mom responded that she was bitten by the neighbor's dog. since then, whenever she is asked about the scar, she has a distinct memory of what happened on the day the dog bit her (even though this never happened). this illustrates: the equipotentiality hypothesis the encoding specificity principle the misinformation effect levels of processing theory
Answer:
the misinformation effect
Explanation:
In psychology, misinformation effect occurs when false memories are formed as a result of the misleading information that was provided after the original event has taken place. This effect was studied by a psychologist named Elizabeth Loftus.
Elizabeth Loftus in her series of experiments discovered that false memories about an event can be induced by suggesting or giving wrong information about it. Hence, the involved persons remember a wrong information about the experienced event based on what they were led to remember via wrong information.
This is the case Felice, who was fed with a wrong information about the scar on her arm. This information make her have a false memory of the event i.e dog bite instead of a broken glass
4. Which type of plate boundary does the image show?
O A. Fragmentation
OB. Transform
O C. Convergent
O D. Divergent
The type of plate boundary that an image is expressing is known as convergent. Thus, the correct option for this question is C.
What do you mean by Plate boundary?A plate boundary may be defined as a type of location where two specific plates meet. These boundaries are generally associated with numerous geological events like earthquakes.
According to the context of this question, plate boundaries govern the three-dimensional surface or zone across which there is a significant change in the velocity that may take place.
Convergent plate boundaries may be characterized as a type of plate boundary when two or more specific plates come together in such a way that they meet. At this boundary, two or more lithospheric plates collide. One plate eventually slides beneath the other.
Therefore, the type of plate boundary that an image is expressing is known as convergent. Thus, the correct option for this question is C.
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ASAP When attempting to determine where plants get their food, how did soil measurements affect the experiments? A. Reduction in soil mass proved that plants get their food from the soil. B. The soil mass did not change, proving that plants do not get their food from soil. C. Increase in soil mass proved that plants do not get their food from the soil. D. Soil measurements were not involved.
Answer:
A. Reduction in soil mass proved that plants get their food from the soil.
Explanation:
Plant take their food from the soil because in soil roots are present which absorb nutrients from the surrounding environment. The nutrients present in the soil comes from the decomposition of dead bodies of plants and animals and sometimes it is provided by the farmers in the form of fertilizers. The plant food contains nitrogen, phosphorus and potassium which is required in large amount for the better growth and development of the plant.
Research each insect, then compare and contrast the life cycles. You will need to write your observations and thoughts down. Be sure to include and describe each stage of development. Your observations, descriptions, and thoughts should be at least 150 words in length.
Incomplete Metamorphosis Complete Metamorphosis
grasshopper butterfly
dragonfly ladybug
cicada housefly
cockroach honeybee
Answer:
Larva and pupa is present in complete metamorphosis while nymph is present instead of larva and pupa in incomplete metamorphosis.
Explanation:
Complete metamorphosis has four stages i. e. egg, larva, pupa, and adult while the incomplete metamorphosis has three stages i. e. egg, nymph, and adult. Grasshopper, dragonfly, cicada and cockroach have incomplete metamorphosis while ladybug , housefly, butterfly and honeybee have complete metamorphosis. Both type of insects lay eggs and after hatching a baby insect comes out called larva. After sometime this larva transforms from immature to mature, this stage is known as pupa. After pupa, the insect converts into an adult which is ready for reproduction. Nymph is a stage that comes in place of larva and pupa in incomplete metamorphosis. in this stage, the insect is small in size and lack of wings but in adult stage the wings appear.
So far, we have examined a cell that does not undergo crossing over. What is true about such a cell?
b. It will produce a limited variety of gametes with certain alleles being always passed on together.
Crossing over is a process that happens during meiosis, where the 23 chromosomes from the mother mixes with the 23 from the dad, creating an individual with an unique combination of genes. The only chromosome that does not do crossing over is the chromosome Y, because it is too different from his counterpart, the chromosome X.