7. T or F: All plant cells contain chloroplasts to perform photosynthesis.
Answers
It a T , As every plant preform photosynthedis
Related Questions
answer all for crown
The ability to taste PTC is due to a single dominant allele "T". You sampled 215 individuals in a biology class, and determined that f150 could detect the bitter taste of PTC and 65 could not.
What is the predicted frequency of the recessive allele (t)?
What is the predicted frequency of dominant allele (T)?
In a population of 10,000 people, how many would be heterozygous (assuming Hardy-Weinberg equilibrium)? Homozygous dominant? Homozygous recessive? Calculate all of the potential frequencies.
Answers
The genotypic and allelic frequencies of population in hardy-weinberg equilibrium remain the same through generations. f(T) = 0.453. f(t) = 0.547. Homozygous dominant individuals = 2050. Heterozygous individuals = 4950. Homozygous recessive individuals = 3000.
What is Hardy-Weinberg Equilibrium?The Hardy-Weinberg equilibrium is a theory that states that a population in equilibium is not evolving (no evolutive forces are acting on it) and its genic and genotypic frequencies remain the same generation after generation.
Assuming a diallelic gene,
⇒ The allelic frequencies in a locus are represented as p and q.
The frequency of the dominant allele p(X) is p The frequency of the recessive allele p(x) is q⇒ The genotypic frequencies after one generation are
p² (Homozygous dominant genotypic frequency), 2pq (Heterozygous genotypic frequency), q² (Homozygous recessive genotypic frequency).To calculate these frequencies, we can use the following formulas,
The addition of the allelic frequencies equals 1
p + q = 1.
The sum of genotypic frequencies equals 1
p² + 2pq + q² = 1
1) N = 215 individuals
150 Individuals could taste PTC ⇒ TT and Tt
65 individuals could not ⇒ tt
To get the frequencies, we will divide the number of individuals expressing each phenotype by the total number of individuals.
Phenotypic frequencies
Capability to taste PTC ⇒ 150/215 = 0.697 ≅ 0.7
No capability to taste PTC ⇒ 65/215 = 0.302 ≅ 0.3
The phenotypic frequency of individuals who can not taste PTC (non-taster) is equal to the genotypic frequency -F(tt)-. We can use this value to get the allelic frequency -f(t)- by taking the square root.
F(tt) = q² = 0.3f(t) = q = √0.3 = 0.547Now we can get the dominant allele frequency -f(T)- by clearing the equation p + q = 1.
p + q = 1
p + 0.547 = 1
p = 1 - 0.547
p = 0.453
f(t) = 0.547f(T) = 0.453Now, by using these allelic frequencies, we can calculate the frequency of individuals TT, Tt, and tt.
F(TT) = p² = 0.453² = 0.205
F(Tt) = 2pq = 2 x 0.453 x 0.547 = 0.495
F(tt) = q²= 0.547²= 0.3
In a population of 10,000 people there will be,
Homozygous dominant individuals = 0.205 x 10,000 = 2050Heterozygous individuals = 0.495 x 10,000 = 4950Homozygous recessive individuals = 0.3 x 10,000 = 3000You can learn more about hardy-weinberg equilibrium at
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hey guys im not begging for help here but ive been stuck for 10 minutes and my time is running out!
Answers
Answer is B. You can tell that from the table.
Which best describes the central and peripheral nervous systems?
Answers
Explanation:
The central nervous system processes stimuli information the body receives, and the peripheral nervous system senses stimuli and carries out the reaction.
Select the orbital bone or bone feature to correctly construct each statement by clicking and dragging the label to the correct location. The vomer bone and perpendicular plate of the ethmoid bone make up the nasal septum, which may be deviated toward one side of the nasal cavity.The pituitary gland, or hypophysis, rests in the sella turcica of the ________in a deep depression called the________. A wild fastball pitch that hits the nose of the batter can drive bone fragments through the __________of the ethmoid bone and into the meninges or tissue of the brain. The __________from each side of the skull that make up your cheekbones consists of the union of the ., temporal bone, and maxilla. cribriform plate zygomatic arch When reading a sad book or watching a sad movie, tears that you cry collect in the _________of the lacrimal bone and drain into the nasal cavity, resulting in a runny nose. perpendicular plate The _________ that make up much of the hard palate of the _______forms a ________when the intermaxillary suture fails to join during early gestation.
Answers
The vomer bone and perpendicular plate of the ethmoid bone make up the nasal septum, which may be deviated toward one side of the nasal cavity.
The pituitary gland, or hypophysis, rests in the sella turcica of the sphenoid bone in a deep depression called the sella turcica.
A wild fastball pitch that hits the nose of the batter can drive bone fragments through the cribriform plate of the ethmoid bone and into the meninges or tissue of the brain.
The zygomatic arch from each side of the skull that make up your cheekbones consists of the union of the temporal bone and maxilla.
When reading a sad book or watching a sad movie, tears that you cry collect in the lacrimal fossa of the lacrimal bone and drain into the nasal cavity, resulting in a runny nose.
The palatine bone that makes up much of the hard palate of the skull forms a cleft palate when the intermaxillary suture fails to join during early gestation.
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Describe the biochemical Structure of
ribonucleotides
Answers
Explanation:
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A ribonucleotide in the RNA chain contains ribose (the pentose sugar), one of the four nitrogenous bases (A, U, G, and C), and a phosphate group. ... (a) Ribonucleotides contain the pentose sugar ribose instead of the deoxyribose found in deoxyribonucleotides.
HELPP PLSSS
After mitosis and cell division are over how are the two new cells similar to the original cell in interphase??
Answers
Answer:
Explanation:
In s phase, the dna replication take place in interphase, The dna in the nucleus replicates so that each chromosome consists of two identical chromatids, then in mitosis they are pulled apart in anaphase in which both cells have half of the chromosomes, in Telophase each chromatid contains one dna molecule, which will replicate itself during interphase before the next division.
The new cells are similar from the original ones in interphase as these will have same amount of DNAs.
What is interphase?The interphase phase of the cell cycle is where the majority of the life of a typical cell occurs.
Interphase is the cell's "daily living" or metabolic phase, during which it obtains and metabolizes nutrients, grows, replicates its DNA in preparation for mitosis, and performs other "normal" cell functions.
The cell cycle's longest phase is interphase. This is the stage at which the cell grows and copies its DNA before entering mitosis.
Chromosomes align, separate, and move into new daughter cells during mitosis. Because the prefix inter- means "between," interphase occurs between mitotic (M) phases.
In interphase, the new cells are similar to the original ones because they have the same number of DNAs.
Thus, this can be the similarity between these two.
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if a star is moving towards earth it is
Answers
Answer:
a shooting star even thou its just a burning rock with a flame tail shooting across the sky XD
Explanation:
Answer:
A shooting star
Explanation:
Without presence of enzymes, the reactions necessary life would require ______ in order to occur
Answers
Without the presence of enzymes, the reactions necessary for life would require higher temperatures in order to occur.
Proteins make up enzymes, which are the fundamental components of all living things. They accelerate biochemical reactions as a result of their function as catalysts. Those reactions simply would not take place or would proceed too slowly to support life. For instance, digestion would be impossible without enzymes.
Because higher temperatures are able to increase the rate of reaction in a reaction, stimulating the activation energy required for the reaction, higher temperatures are able to complete the reactions necessary to sustain life without the presence of enzymes.
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Without the presence of enzymes, the reactions necessary for life would require much higher temperatures and/or pressures in order to occur.
Enzymes have the ability to accelerate chemical reactions without being eaten, which is how they function as catalysts. They achieve this by reducing the activation energy necessary for a reaction to start, enabling it to proceed considerably more quickly and at lower temperatures and pressures. At the temperatures and pressures experienced in live organisms, reactions would occur much more slowly—or not at all—without the presence of enzymes.Proteins provide the primary function of enzymes, which are catalysts that quicken practically all chemical events within cells.
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How are birds and reptiles more similar based on their adult features? cer
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I DONT UNDERSTAND PLS HELP
Answers
Answer:
Memory cells are specalised types Nerve Cells .
please help me solve these questions
Answers
Answer: 7:A
8:C
9:D
10:B
Mendels First Law: The law of segregation. During gamete formation each member of the allelic pair seperates from the other member to form the gentic consittution og the gamete.
Transcription: Is the process by which the information in a strand of DNA is copied into a new molecule of RNA.
Explanation: I checked most of them online. Im not too sure if 9 is D but it is my best guess.
define sexual reproduction .
Answers
the production of new living organisms by combining genetic information from two individuals of different types (sexes). In most higher organisms, one sex (male) produces a small motile gamete which travels to fuse with a larger stationary gamete produced by the other
A mistake that occurs when both parties to a contract are mistaken about the same material fact is:_______
a. duress.
b. undue influence.
c. bilateral.
d. unilateral.
Answers
A mistake that occurs when both parties to a contract are mistaken about the same material fact is bilateral. The correct option is c.
A mistake that occurs when both parties to a contract are mistaken about the same material fact is called a bilateral mistake. In this situation, both parties have an erroneous understanding or belief about a particular fact that is significant to the contract. This mutual mistake can affect the formation of the contract and may provide grounds for its rescission or cancellation.
Duress and undue influence, options a and b, refer to situations where one party exerts pressure or influences the other party to enter into a contract against their will or better judgment. These factors can invalidate the contract if they are proven to have compromised the party's free will.
Unilateral, option d, refers to a mistake made by one party to a contract. It is distinct from a bilateral mistake because it involves only one party being mistaken about a material fact, while the other party has correct knowledge or understanding. Therefore, the correct answer is c.
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which structure is highlighted?coccygeal regionthoracic regioncervical regionlumbar regionsacral region
Answers
The mentioned regions include the coccygeal (tailbone), thoracic (upper back), cervical (neck), lumbar (lower back), and sacral (between hips) regions.
These are all parts of the vertebral column, also known as the spinal column or backbone.
1. Coccygeal region: This region consists of the coccyx or tailbone, which is the small triangular bone at the base of the spine. It is the remnant of a vestigial tail in humans.
2. Thoracic region: This region consists of 12 thoracic vertebrae located in the upper back, where the ribs attach. They support the ribcage and protect the heart and lungs.
3. Cervical region: This region consists of 7 cervical vertebrae located in the neck. They provide support and flexibility to the neck and protect the spinal cord.
4. Lumbar region: This region consists of 5 lumbar vertebrae in the lower back, providing support to the weight of the upper body and allowing for movements such as bending and twisting.
5. Sacral region: This region consists of the sacrum, a large triangular bone located between the two hip bones. It connects the spine to the pelvis and supports the weight of the body while standing or walking.
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Where does the restriction enzyme BamH1 cut the DNA?
Answers
The restriction enzyme BamH1, also known as BamHI, recognizes and cuts DNA at a specific sequence of nucleotides. The recognition sequence for BamH1 is:
5'-G|GATCC-3'
3'-CCTAG|G-5'
The vertical line indicates the site of cleavage. BamH1 cleaves between the G and the A nucleotides in the sequence G|GATCC, generating "sticky ends" with overhanging single-stranded DNA at the 5' end. This property makes BamH1 useful in DNA cloning and genetic engineering applications.
It is important to note that restriction enzymes, like BamH1, are very specific and will only cut DNA at their recognition site. This makes them a useful tool in molecular biology for manipulating and analyzing DNA.
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the primary reason steroid hormones usually act slowly is that . the primary reason steroid hormones usually act slowly is that . they are produced at very low concentrations acting via a signal transduction pathway makes for slower responses than does directly interacting with a cell's dna they are too large to enter a cell and therefore must first bind to a plasma membrane receptor before having an effect on a cell target cells tend to ignore steroid hormones in favor of nonsteroid hormones they turn genes on or off and it takes time for gene products to build up or become depleted
Answers
Primary reason steroid hormones usually act slowly is that e. they turn genes on or off and it takes time for gene products to build up or become depleted.
Primary reason why steroid hormones usually act slowly is that they turn genes on or off and it takes time for gene products to build up or become depleted. The receptors for steroid hormones tend to be cytoplasmic proteins that also serve as transcription factors which also requires them to enter the nucleus.
Steroids can also act very quickly, by binding to cell surface receptors, or slowly, by binding to cytoplasmic or nucleic receptors and ultimately activate gene transcription.
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Energy Flow through Ecosystems with Decomposers
The diagram below represents some energy transfers in an ecosystem.
Which type of organism is most likely represented by letter X?
decomposer
O autotroph
producer
O herbivore
1
2
3
4
5
6
7
8
Answers
Answer:
The cycle of energy is based on the flow of energy through different trophic levels in an ecosystem. ... At the first trophic level, primary producers use solar energy to produce organic material through photosynthesis. The herbivores at the second trophic level, use the plants as food which gives them energy.
Explanation:
How does natural selection explain why some organisms are more likely to survive and reproduce than other organisms?.
Answers
The organisms are more likely to survive and reproduce than other organisms: genetic mutations that are beneficial to an individual's survival are passed on through reproduction.
In biology, an organism is any natural, dwelling machine that functions as an individual entity. All organisms are composed of cells. Organisms are labeled by taxonomy into businesses such as multicellular animals, plant life, and fungi; or unicellular microorganisms which include protists, bacteria, and archaea.
Organisms are labeled by taxonomy into companies such as multicellular animals, plants, and fungi; or unicellular microorganisms which include protists, bacteria, and archaea.
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A parent cell has 24 chromosomes at the beginning of interphase. How many chromatids will it have during prophase? 48 24 12 06 Which of the following best describes a major difference between plant cells and animal cells? O Only plant cells use cellular respiration. Only plant cells have a nucleus containing DNA. Unlike plant cells, animal cells cannot make their own food. Only animal cells have a cell wall.
Answers
During prophase, the parent cell will have 48 chromatids. This is because during interphase, the DNA replicates, resulting in each chromosome consisting of two sister chromatids.
Therefore, if the parent cell has 24 chromosomes, it will have a total of 48 chromatids during prophase.
Regarding the major difference between plant cells and animal cells, the most accurate statement is: "Only plant cells have a cell wall." Plant cells have a rigid cell wall made of cellulose, which provides structural support and protection to the cell. Animal cells, on the other hand, do not have a cell wall. Hence option D is correct.
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Ferns, such as the one in the picture, can be found today. They are usually found
growing in warmer climates. However, fossils of ferns have been found in places with
cold climates where it often snows today. What can we conclude about the places
where the fossils of ferns have been found?
A. Ferns used to live in cold climates.
B. These places once had a warmer climate.
C. Someone tried to grow ferns in cold climates.
D. These places once had a colder climate.
Answers
Answer:
B. These places once had a warmer climate.
Explanation:
They're fossils meaning they're extremely old therefore the climate they once grew in was suitable for its needs until the climate changed causing them to die.
In an energy pyramid, what organisms have the most energy available? *
1.) herbivores
2.) producers
3.) carnivores
4.) top predator
Answers
Answer:
I think producers
Explanation:
In an energy pyramid, producers have the most energy available. The correct option is 2.
What is energy pyramid?A graphic that depicts the biomass or bioproductivity at each trophic level in an ecosystem is called an ecological pyramid.
An ecosystem's energy transfer from one trophic, or feeding, level to the next is depicted by an energy pyramid.
The model is a figure that contrasts how much energy different trophic levels of species use. Kilocalories are the units used to measure the energy in an energy pyramid (kcal).
The producers are located in the base of the pyramid, which is also its greatest level.
The amount of energy diminishes and the levels get smaller as you progress up the pyramid, via the trophic levels to primary, secondary, and tertiary consumers.
Thus, the correct option is 2.
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how do genes regulate the cell's Chemistry
Answers
Answer:
a variety of genes are involved in the control of cell growth and division. the cell replicates itself in an organized, step by step fashion known as the cell cycle.
Explanation:
tight regulation of this process ensures a dividing cell's DNA is copied properly, any errors in the DNA are repaired and each daughter cell receives a full set of chromosomes.
PLEAAAASE SOMEONE DRAW MITOSIS AND MEIOSIS FOR ME. IGNORE WHATS ALREADY DONE
Answers
Mitosis produces two diploid cells (2n). Meiosis produces four haploid cells (n). A diploid cell 2n = 8 that suffers Mitosis produces 2 diploid cells with 8 chromosomes each. A diploid cell 2n = 8 that suffers Meiosis produces 4 haploid cells with 4 chromosomes each.
What are mitosis and meiosis?
Mitosis and meiosis are two cell division processes that differ in the number of cells they produce and the genetic charge of the resulting daughter cells.
Through Mitosis a diploid somatic cell (2n), produces two daughter diploid cells (2n). During mitosis, the whole-cell first suffers duplication of its content and then it separates. Mitosis occurs in somatic cells and in germ cells. Through Meiosis a diploid germ cell (2n) produces four daughter haploid cells (n). These cells are the gametes. After DNA replication there are two meiotic phases.- The first one is a reductive phase, in which homologous chromosomes separate.
- In the second phase, the cell suffers a new, not reductive division.
In the exposed example, we have a germ cell 2n = 8 that suffers meiosis and produces 4 gametes n = 4.
We will draw each chromosome with a different color to visualize migration and crossing over events.
In the attached files you will find the example.
If the same diploid cell suffers mitosis, it will produce two diploid daughter cells 2n = 8.
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A single stomata is surrounded by two guard cells that change shape in response to environmental factors and open or close the stoma, Which of the following best
explains how this structure of a leaf is used in processes that occur in plants?
water enters the plant through the surface of the leaf for transpiration
gases for photosynthesis are exchanged through the surface of the leaf
energy for cellular reproduction is absorbed through the surface of the leaf
Carbon dioxide enters the plant through the surface of the leaf for cellular reproduction
Answers
Stomata play a crucial role in the photosynthesis process, which is the primary way that plants make their food.
What is Stomata?
Stomata are microscopic pores or openings on the surfaces of leaves, stems, and other plant organs, surrounded by two specialized cells called guard cells. They regulate the exchange of gases and water vapor between the interior of the plant and the atmosphere. Stomata allow carbon dioxide to enter the plant for use in photosynthesis and allow oxygen to exit as a byproduct of the process. They also help control water loss from the plant through transpiration.
The following option best explains how the structure of stomata is used in processes that occur in plants:
Gases for photosynthesis are exchanged through the surface of the leaf.
The stomata present on the surface of the leaves allow the exchange of gases, including oxygen and carbon dioxide, with the external environment. Carbon dioxide enters the plant through stomata, which is necessary for photosynthesis, and oxygen and water vapor exit the plant through the same opening.
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Pathogenic bacteria that contain S-layers are protected against host defense mechanisms. Group of answer choices True False
Answers
Pathogenic bacteria that contain S-layers are protected against host defense mechanisms. This statement is true. In general, bacterial pathogens that colonize host surfaces come across an array of host defense mechanisms.
Some of these mechanisms involve attack by soluble host factors, such as lysozyme or antimicrobial peptides, which may destroy bacteria without direct contact. Other defense mechanisms depend on the interaction between host cells and bacteria. These mechanisms include the action of white blood cells and antibodies that recognize bacterial surface components and promote the phagocytosis of bacteria. Bacterial S-layers can protect bacterial pathogens against host defense mechanisms.For example, the S-layer of Lactobacillus acidophilus NCFM is known to protect against complement activation and complement-mediated phagocytosis, whereas in Streptococcus pneumoniae, the S-layer has been shown to prevent bactericidal activity of lysozyme.
Additionally, in Bacillus anthracis, the S-layer has been shown to protect against phagocytosis by human neutrophils and alveolar macrophages.So, in conclusion, pathogenic bacteria that contain S-layers are protected against host defense mechanisms.
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1. Which is not a characteristic of most plants?
a. possess tissues
C. possess plastids
d. are consumers
b. are eukaryotic
Answers
majority of plants use photosynthesis, its rare that a plan consumes, venus fly trap is one of the only plants that consumes
All of the following are single-celled eukaryotes except(1 point)
amoebas
bacteria
protozoans
yeast
Answers
Answer:
bacteria because it is a prokaryote
Answer:
eukariotes
Explanation:
Can y’all help me figure out the other ones or can y’all correct my work if I messed up because I’m stuck.
Answers
Answer:
5. ee, attatched earlobes
8. Ee, free earlobes
Explanation:
What is A trait that makes it more likely that an individual will survive in a specific environment *
Answers
Answer:
I assume this is the assignment about investigating changes in trait distribution? if I,m rightArteries are high in blank
while capillaries are high in blank
oxygen; carbon dioxide
carbon dioxide; oxygen
oxygen; nitrogen
nitrogen; carbon dioxide
Answers
i) oxygen
ii)carbon dioxide
Explanation:
I don't know.. ...
I think your options are wrong
I mean
artries are filled with oxygenated blood not just oxygen
and
capillaries are filled with blood too. It helps to transfer food or exchange in waste products of body
thus, it is not filled with carbon dioxide but waste products Inclues little amount of carbon dioxide
hope it helps ☺️