Answer:
B. The cell is in meiosis II and is ready to complete the second division over.
Explanation:
Hope it helps.
Which blood type can be transfused into a patient who has blood type A–?
Answer:
o negative
Explanation:
The diagram shows animal and plant cells placed in 3 different types of solutions.
a) Name the 3 types of solutions taking inference from the picture above and explain the process taking place in A
b) When plant cell is placed in solution C, which part prevents it from bursting and how?
c) Name the process by which Amoeba obtains its food
This diagram shows vegetal and animal cells placed in solutions of different concentrations.
a)Solution A is called hypertonic because it has a higher concentration than the cell's cytoplasm. In the animal cell, it causes the water to diffuse out through osmosis. In the plant cell water is lost through the same process but the cell wall remains intact while the membrane reduces in volume.
Solution B is called isotonic because it has around the same concentration as the cytoplasm of the cell. It does not influence the volume of the cell.
Solution C is called hypotonic because it has a lower concentration than the cytoplasm. In the animal cell, it causes the cell to fill with water until it bursts(this process is called cytolysis). In the plant cell water diffuses through the membrane, but the cell doesn't burst.
b)Plant cells have a strong cell wall made of cellulose, hemicellulose and, lignin that prevents cytolysis.
c)Amoeba obtains its food through a process called phagocytosis in which the solid material is engulfed in a vesicle that enters the cell.
Plant cells have a strong cell wall made of cellulose, hemicellulose and, lignin that prevents cytolysis.
What do you mean by cytolysis?Cytolysis, or osmotic lysis, occurs when a cell bursts due to an osmotic imbalance that has caused excess water to diffuse into the cell. Water can enter the cell by diffusion through the cell membrane or through selective membrane.
Cytolysis or osmotic lysis occurs in animal cells and certain bacteria, especially when the cells are exposed to a hypotonic environment, causing the water to move into the cell, thereby increasing or expanding the cell.
When cells burst and die, their contents are released, causing inflammation. Every day, more than 50 billion cells die in our bodies. These are not random events, but part of a finely tuned biological mechanism called programmed cell death.
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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.
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) 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.
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.
.
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.
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.
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.
If each NADH generates "3 ATP" molecules and each FADH2 generates 2 ATP molecules, calculate the number of ATP molecules generated from one saturated 18 ‑carbon fatty acid.
Answer:
90 ATP
Explanation:
Every acetyl-CoA yields 3 NADH and 1 FADH2
18 carbon fatty acid is known to have 9 Acetyl CoA.
1 acetyl CoA produces a total of 10ATP.
Since the 18 carbon fatty acid has a total of 9 Acetyl CoA then the total number of ATP produced is 9* 10 which results in 90 ATP being formed when it passes through the various reaction mechanisms.
Drag each tile to the correct box. Arrange the stages of the frog’s life cycle from first to last. ↓ ↓ ↓ ↓
You didn't put the answer options, but the frog life cycle phases are:
Mating: In this phase two adult frogs, a male and a female, mate in the water or on plates. At this point, the male frog wraps his arms around the female and overlaps over her back. Spawning: At this point, the female releases the eggs into the water, ready to be fertilized by the males. Fertilization occurs outside the female's body. Eggs: Some fertilized eggs will be devoured by small animals, but those that survive will hatch 7-9 days after fertilization, releasing a frog shape, called a tadpole.Tadpole: It is similar to a fish and is formed by tail, mouth and gills. After 7 days of life, you will be able to swim and feed on algae. Four weeks later he will develop teeth and skin. When he reaches 9 weeks he will begin to change his shape, growing in size and developing head and legs. At that moment it will look more like a frog, but it still has a long tail. Metamorphosis of the fish: Up to twelve weeks of age it will reach the shape of a frog and start to feed on insects. Gradually it will lose its tail and its tongue will grow. The 16 weeks will become an adult frog, being able to mate and restart the cycle.Answer:
The answer is below mark brainlyist
Explanation:
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.
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-
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.
botanical name for fals yam
Answer:
Icacina senegalensis.
Hope it helps you:)Answer:
[tex]\boxed{\mathrm{Icacina \:\: oliviformis}}[/tex]
Explanation:
False yam is a root crop found in the Northern part of Ghana.
The botanical name for False yam is Icacina oliviformis.
what kingdom does fish belongs to?
Answer:
animalia
Explanation:
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.
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.
How osmosis works in the three fluid compartments of the body
Answer:
Explanation:
In the body, water moves through semi-permeable membranes of cells and from one compartment of the body to another by a process called osmosis. Osmosis is basically the diffusion of water from regions of higher concentration to regions of lower concentration, along an osmotic gradient across a semi-permeable membrane.
How do the products of meiosis compare to the original cell?
Answer:
Meiosis is the type of cell division in which a parent cell divides into four daughter cells. Meiosis generally occurs in the gamete or sex cells. The haploid cells are produced by the meiosis.
The original cell is diploid that contains the chromosome number (2X). The original is divided into the four daughter cell. The daughter cells produced by the meiosis contains the half chromosome number as compared with original cell (X). The crossing over occurs in meiosis and the daughter cells are quite different from the original cells.
Explanation:
Coal and petroleum products (fossil fuels) are a powerful resource of ___________ and energy. Following _________ plants and animals are buried and "stored" underground for millions of years leading to the formation of these byproducts.
Answer:
Carbon AND
DEATH
Explanation:
Carbon containing organic molecules derived from the remains of dead plants and animals on the earth million of years ago, buried deep under the sediment and rock layers are called Fossil fuels. Coal,oil,and natural gas are examples.
These underground deposits were formed million of years ago,due to the chemical reactions between relatively underground water molecules on one hand,and the earliest mic organisms viz algae,bacteria which inhabited the earth other hand.These decomposition occurred around 540 to 65milion years ago.
However,some million of later chemical reactions in the soil leads to compression of these remains underground.The degradation leads to formation of the fossil fuel precursor called Kerogen. With time Geothermal heat transforms the kerogen precursor to fossil fuel. some other kerogens are transformed to other natural gas,coal etc.
16. Figure it shows the digestive system
С
D
Answer:
Is there any picture or diagram to go with this question?
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.
Hypoxia induces transcription of a DNA methyltransferase, DNMT1. What does this suggest about the relationship between hypoxia and regulation of gene expression
Answer:
Hypoxia is defined as an inherent condition of tumors that causes cancer development.
Hypoxia induces transcription of DNA methyltransferase, DNMT1 which suggest that hypoxia and regulation of gene expression have epigenetic relationship that refers to inheritable mechanisms responsible for regulating gene expression without altering the sequence of DNA bases.
DNA methylation is main epigenetic mechanism of Hypoxia.
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.
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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Describe the biosynthetic pathway that produces catecholamines such as norepinephrine and epinephrine from amino acid precursors and explain how the lack of available amino acids precursors would impact homeostasis regulated by catecholamines.
Answer:
Tyrosine and phenylalanine are amino acids required for the synthesis of catecholamines
Explanation:
The catecholamines are hormones composed of a catechol ring group (benzene) and an amine lateral chain. One of the most common catecholamines is the neurotransmitter norepinephrine (noradrenaline). The biosynthesis pathway of the norepinephrine hormone includes the following steps: 1-tyrosine hydroxylase produces L-DOPA from tyrosine, 2-L-DOPA is subsequently tranformed into dopamine by the L-amino acid decarboxylase, and finally, 3-this chemical precursor is converted into norepinephrine by the action of the dopamine β-hydroxylase.
Phenylketonuria is a congenital metabolic disease associated with a decrease in the metabolism of phenylalanine (Phe), which is an amino acid residue that acts as a precursor of different catecholamines including dopamine, norepinephrine (noradrenaline), and epinephrine (adrenaline). Dietary restriction of tyrosine and phenylalanine is the most common treatment against phenylketonuria.
The respiratory system allows for gas exchange to happen in the lungs. How do the respiratory and cardiovascular systems interact?
Well, the respiratory system is responsible for bringing oxygen into the body. Blood passes in capillaries in the lungs and picks up the oxygen. Blood carries oxygen to different parts of the body. Then the blood take carbon dioxide, a waste gas, back to the lungs. Then the lungs expel the carbon dioxide when you exhale.
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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.
A new species is descovered and scientists are trying to calssify it. One of the key features found is that the species is entirely dependent on other organisms for its fodd necessary to ssutain life. What type of species is this? A. Autotrophic B. Heterotrophic C. Producer D. Mixotrophic
Answer:
B. Heterotrophic
Explanation:
Heterotrphic animals depend on other orgamisms for food. They are made of carnaviors and omnavores. They eat other animals for food.
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.
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