Choose the phase of meiosis in column 2 that best matches each event in column 1. - one haploid set of replicated chromosomes at each spindle pole - genetic recombination events take place - shortest stage - aligning of bivalents in the center of a spindle - one haploid set of unreplicated chromosomes at each spindle pole - aligning of monovalents in the center of a spindle - separation of homologous chromosomes - separation of sister chromatids A. telophase II B. anaphase I C. metaphase I D. prophase II E. anaphase II F. telophase I G. metaphase II H. prophase I
Answers
Answer:
H. prophase I → genetic recombination events take place
C. metaphase I → aligning of bivalents in the center of a spindle
B. anaphase I → separation of homologous chromosomes
F. telophase I → one haploid set of replicated chromosomes at each spindle pole
D. prophase II → shortest stage
G. metaphase II → aligning of monovalents in the center of a spindle
E. anaphase II → separation of sister chromatids
A. telophase II → one haploid set of unreplicated chromosomes at each spindle pole
Explanation:
Through the process of Meiosis, a diploid germ cell (2n) divides and originates four daughter cells with a haploid chromosome number (n). Each daughter cell has half of the chromosomes of the original one. Meiosis is completed in two phases. During the first phase, and after replication, occurs the chromosome´s reduction division. During the second phase, the cell suffers a new, not reductive division.
1. In the first phase, Meiosis I:
Prophase I: Chromosomes condensate and became visible. Occurs crossing-over between homologous chromosomes. Crossin-over makes the daughter cells to be genetically different from the original one. Metaphase I: The pairs of homologous chromosomes randomly align in the equatorial plane. Anaphase I: occurs the independent separation of homologous chromosomes that migrate to opposite poles of the cell. This separation generates different chromosomal combinations in the daughter cells. Telophase I: Each of the homologous pairs chromosomes is already in the corresponding poles, and the nuclear membrane forms again in each pole.2. In the second phase, Meiosis II:
Prophase II: Chromosomes condensate again and become visible. Metaphase II: Chromosomes join the spindle apparatus and migrate to the equatorial plane, where they randomly line up. Sister chromatids are holden together until they reach the Anaphase. Anaphase II: Centromeres divide, chromatids get separated, and each of them goes forward an opposite cellular pole. Telophase II: Once in the poles, the chromosomes became lax again, and cytokinesis occurs.
Related Questions
Which of the following is an example of reconciliation ecology
Answers
Two of many examples of successful reconciliation ecology in action, he added, are the Chihuahua leopard frog and the American crocodile. The Chihuahua leopard frog not long ago nearly disappeared from federal reserve land that had been created, in part, to save this creature endemic only to the Southwest.
1. A type of movement of substances across the cell membrane that requires no energy is --
A. cell mediated movement
B. facilitated diffusion
C. active transport
D. receptor protein action
Answers
Answer:
B. facilitated diffusion
Explanation:
Communities with cold winters often spread salt on roadways. Salt lowers the melting point of water, which means slippery snow and ice will melt instead of building up on roads. While this does prevent car accidents, it poses certain problems. What is the most serious problem that could occur to local ecosystems due to road salt?.
Answers
Problems in ecosystem due to road salt are flooding, damage to plant life, water pollution and accidents.
What is ecosystem?An ecosystem is a region where a bubble of life is created by plants, animals, and other species working together with the weather and topography. Ecosystems are made up of both biotic, or living, and abiotic, or non-living, components.
The cause of the problem is floods caused by excessive ice and snow melting, damage to local plants caused content of salt in the soil, animals that lick salt are prone to accidents, significant increases in soil erosion rates influence the water quality of streams and rivers.
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Consider the following two statements about succession.
Student 1:
Matthew - As succession begins, communities tend to be dominated by mostly K-selected species. As succession continues, r-selected species tend to compete better and therefore become more and more common.
Student 2:
Iman - As succession begins, communities tend to be dominated by mostly r-selected species. As succession continues, K-selected species tend to compete better and therefore become more and more common.
Which student is correct?
a. Provide a rationale for your answer (2 marks)
b. Provide a specific example of succession which includes at least one example of an r-selected and one example of a K-selected species. (1 mark)
Note - No marks are earned by simply agreeing with either Matthew or Iman
Answers
Immature bone cells are derived from stem cells called ________________. These cells differentiate into _______________ that secrete matrix. Then these bone cells get stuck in the chamber called lacunae and are now considered mature bone cells or _____________.
Answers
Immature bone cells are derived from stem cells called osteoprogenitor cells. These cells differentiate into osteoblasts that secrete matrix. Then these bone cells get stuck in the chamber called lacunae and are now considered mature bone cells or osteocytes.
Immature bone cells are derived from stem cells called osteoprogenitor cells. These cells differentiate into osteoblasts that secrete matrix. Then these bone cells get stuck in the chamber called lacunae and are now considered mature bone cells or osteocytes. In the process of bone formation, immature bone cells originate from stem cells known as osteoprogenitor cells.
These osteoprogenitor cells have the ability to differentiate into osteoblasts, which are responsible for secreting the bone matrix. As the bone matrix is formed, the osteoblasts become surrounded by the matrix and become trapped within small spaces called lacunae.
Once trapped in the lacunae, the osteoblasts mature into mature bone cells known as osteocytes. Osteocytes are fully differentiated cells that play a vital role in maintaining the health and integrity of the bone tissue.
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1. Which systems (2) are primarily responsible for movement of the body
Answers
Answer:
The correct answer is -muscular system and skeletal system.
Explanation:
The skeletal system and the muscular system work together to move the body or body parts. Different types of tissues form the muscular system that and their action on bones controls the movement of the body in vertebrates.
Tendons are tough muscles that attach with the bones and joints allow the movement by contraction of muscle that helps in moving bones from joint. Muscle normally acts by contracting and relaxing in pairs.
In males, the 4 haploid or diploid cells at the end of Meiosis 2 become 4 sperm cells.
Answers
evidence that ____ with your prediction supports your hypothesis
Answers
Answer:
Agrees
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Tysm!
Which of the following is NOT a characteristic of animals ?
A. The ability to make food
B. The ability to move
C. Eukaryotic cells
D. Cells that lack cell walls
Answers
Answer:
The answer is "A"
Explanation:
They cannot make their own food, they are heterotrophs
What types of microbes are present in the anoxic digester?
Answers
In an anoxic digester, various types of microbes are present, including facultative anaerobic bacteria, denitrifying bacteria, and some fermentative microorganisms.
These microbes play a crucial role in the process of breaking down organic matter and converting nitrogen compounds under low oxygen conditions.
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Which statement best describes the energy changes associated with evaporation and boiling?
Atoms gain energy during evaporation and boiling.
Atoms lose energy during evaporation and boiling.
Atoms gain energy during evaporation but lose energy during boiling.
Atoms lose energy during evaporation but gain energy during boiling.
Answers d edginuity good luck
Answers
Answer:
Atoms lose energy during evaporation but gain energy during boiling.
Explanation:
Answer:
its c
Explanation:
Human eggs mature one by one after puberty True or False
Answers
Explanation the eggs do not start to mature until she enters puberty
In living organisms, there is typically a net release of energy as complex molecules are broken down into smaller compounds.
Which of the following statements correctly describes energy during processes that build up complex molecules from simpler compounds?
Choose 1 answer:
(Choice A)
A
There is a net release of energy.
(Choice B)
B
There is a net consumption of energy.
(Choice C)
C
There is no energy change as energy is neither created nor destroyed.
Answers
There is a net consumption of energy. The net consumption of energy during anabolism is necessary for growth, repair, and maintenance of cellular structures and functions. The correct answer is (Choice B).
In living organisms, the process of building complex molecules from simpler compounds is called anabolism. This process is endergonic, meaning it requires a net input of energy. The energy consumed is typically stored in chemical bonds within the complex molecules.
Conversely, when complex molecules are broken down into smaller compounds (catabolism), energy is released. These two processes, anabolism and catabolism, make up the organism's metabolism. The net consumption of energy during anabolism is necessary for growth, repair, and maintenance of cellular structures and functions.
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Are carbon compounds and organic compounds the same
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What can you inter about the growth of the seed type pictured in the graphs below?
a. More seeds grow with more light.
b More seeds grow with less light.
C. The seeds grow faster with more light.
d Tinht has no effect on seed growth.
Answers
Answer:
The 2 graphs are pretty much showing the same effects on the dependent variable, so I would say that light has no effect on seed growth.
On the other hand, just by thinking logically, Seeds are usually underground before germination, so light wouldn't really affect them much.
So, light wouldn't really affect them
So d)
What does mitosis mean in cancer?
Answers
the production of egg and sperm cells is necessary for sexual reproduction because-
Answers
Sperm cells are produced in men's testicles and egg cells are produced in women's ovaries. Sex cells are different from other cells in one special way: Putting simply, they only have one half of the total amount of human genetic information
The egg and sperm cells are produced by Meiosis, which is a special type of cell division, where the cells only have half the number of chromosomes, one from each pair. When the process of Meiosis is complete, 4 cells are formed = eggs or sperm.
When there is the egg production so it increase the no of chromosomes where the gametes should combined.
What are chromosomes?
A chromosome refer to the long DNA molecule where it contain the genetic material with respect to the organism.
Mainly eukaryotic chromosomes involved the packaging proteins that we called as the histones that should be aided by the chaperone proteins.
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A study was conducted to evaluate the relationship between artificial sweeteners and bladder cancer. 3,000 cases and 3,000 controls were enrolled in the study. Among the cases, 1293 had used artificial sweeteners in the past, while 1707 had never used artificial sweeteners. Of the controls, 855 had used sweeteners and 2145 had not.
a. What is the exposure and what is the disease?
Calculate the correct measure and show your work.
How do we interpret this effect estimate?
Answers
Answer:
A. exposure - use of artificial sweeteners
disease - bladder cancer
In this research artificial sweeteners are used as the exposure that leads to bladder cancer disease.
B. Bladder cancer No bladder cancer
Artificial sweeteners 1293(a) 855(b)
No artificial sweeteners 1707(c) 2145(d)
Total 3000 3000
Cases -
- Risk factor (Artificial sweeteners) present (1293)
- Risk factor (Artificial sweeteners) absent (1707)
Controls
- Risk factor (Artificial sweeteners) present (855)
- Risk factor (Artificial sweeteners) absent (2145)
Odds ratio or strength of association between exposure and disease
OR= Cases with exposure/cases without exposure= a/c divided by b/d
So, the putting value ad/bc= 1293*2145/855*1707
= 1.9
OR would be 1.9
C. this interprets that there is a 90% increase in the chance of bladder cancer if exposed to artificial sweeteners or people with bladder cancer have a 1.90 times higher odds of using artificial sweeteners compared to controls
III
What gives these basil leaves their green color?
1 the veins in the leaf
2the chlorophyll in the stomata
3the chlorophyll in the chloroplast
4the epidermis of the leaf
Answers
WHAT IF? Suppose X-rays caused a sequence change in the TATA box of a particular gene's promoter. How would that affect transcription of the gene? (See Figure 17.8.)
Answers
If an X-ray caused a sequence change in the TATA box of a particular gene's promoter, it would have a direct effect on gene transcription. The TATA box is the section the transcription machinery binds to the promoter in order to initiate transcription of the gene.
Therefore, a sequence change in the TATA box would alter the way the machinery binds to the promoter and, as a result, the gene would not be transcribed properly and its expression would be significantly decreased.
For example, if the sequence of the TATA box is changed from TATAAA to TATATG, the transcription machinery would not be able to bind to the promoter as well as it previously did resulting in less optimal gene expression. Thus, changes in the TATA box sequence could have drastic effects gene expression and, therefore, should be taken into consideration when studying gene expression and regulation.
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What does active range of motion prevent
Answers
Engaging in active range of motion exercises can help prevent muscle and joint stiffness, contractures, and blood clots, all of which can have serious consequences for your health and well-being. Active range of motion (AROM) refers to the ability of a joint to move through its full range of motion actively, without assistance. Engaging in exercises that promote AROM can help prevent a variety of conditions and complications.
AROM exercises can help prevent muscle and joint stiffness, which can occur after an injury, surgery, or prolonged inactivity. By regularly engaging in AROM exercises, you can help maintain the flexibility of your muscles and joints, preventing them from becoming stiff and painful.
AROM exercises can help prevent the development of contractures, which are abnormal, permanent shortening of the muscles and tendons around a joint. Contractures can occur after prolonged immobility or as a result of neurological conditions such as stroke or spinal cord injury. By engaging in AROM exercises, you can help maintain the normal length and function of your muscles, reducing the risk of contracture formation.
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When is a place considered to be
healthy?
when biodiversity is high
O when biodiversity is very low
O when there is no life
O when bacteria are gone
Answers
Answer:
A, When biodiversity is high.
Explanation:
High biodiversity indicates a wide range of species with diverse ecological roles, which promotes ecosystem stability and resilience to environmental disturbances. Greater biodiversity also ensures a more complex food web, increasing the availability of resources, and supporting more complex ecological interactions. Furthermore, diverse species provide critical ecosystem services such as nutrient cycling, water purification, and soil formation, enhancing the health of the environment and benefiting human well-being.
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Due 23 October 2020 11:59
Instructions
Essential Questions:
How do we determine the weather of a particular location?
Answers
FROM SCHOLASTIC
Which cells contain chloroplasts?
A:cells in plant leaves
B:cells in plant roots and stems
C:cells in animal muscles
D:cells in animal brains
Answers
Answer:
cell in plant's leaves
Explanation:
cell in plant's leaves
Answer:
A:cells in plant leaves
Explanation:
Chloroplasts are located in the leaves of plants,which contains chlorophyll.This aids in photosynthesis.
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A fish farmer has a large pool used to grow a species of fish. The farmer decides to add a second species of fish to the pool. Both fish species feed on the same type of food, but the fish farmer does not increase the amount of food added to the pool, maintaining the same carrying capacity in the pool.
Which graph shows how the population of the two fish species will change?
Answers
Answer:
D
Explanation:
Explanation: The capacity of fish to the ratio of population change increased and showed a variable degree of measurements.
the region where blood vessels enter the ovary is called the the region where blood vessels enter the ovary is called the ovarian ligament. ovarian hilum. tunica albuginea. ovarian umbilical cord. infundibulopelvic ligament.
Answers
The region where blood vessels enter the ovary is called the ovarian hilum.
This is where the ovarian artery and vein enter and exit the ovary. The ovarian hilum is a small indentation located on the medial surface of the ovary, and it is surrounded by the ovarian ligament, which attaches the ovary to the uterus. The ovary is also covered by a dense connective tissue capsule called the tunica albuginea, which gives the ovary its shape and protects it from damage.
The infundibulopelvic ligament connects the ovary to the fallopian tube and the broad ligament of the uterus, and it helps to support the ovary in its position within the pelvic cavity. Finally, the ovarian umbilical cord is a vestigial structure that is present during fetal development but disappears before birth.
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which macromolecule provides the blocks for recovery and repair in forming new muscle?
Answers
Answer:
It hast be protein
Explanation:
Answer:
Protein
Explanation:
Proteins provide strength,structure,and support for the body.
a researcher is studying a population of mosquitoes in a lake. the researcher is interested in two alleles of the same gene, d and d, in these mosquitoes. at the start of the study, the researcher calculates the following genotype frequencies in the mosquito population: dd 0.6, dd 0.17, and dd 0.23. when this population is re-sampled 10 years later, the researcher collects the following genotype frequencies: dd 0.4, dd 0.3, and dd 0.3. what can the researcher conclude about this mosquito population?
Answers
The researcher can conclude about this mosquito population is the population is evolving and it is not in Hardy-Weinberg Equilibrium (HWE).
What is the Hardy-Weinberg Equilibrium?Hаrdy-Weinberg Equilibrium (HWE) is used to estimаte the number of homozygous аnd heterozygous vаriаnt cаrriers bаsed on its аllele frequency in populаtions thаt аre not evolving. Аccording to HWE, for а locus with two аlleles А аnd а with corresponding frequencies p аnd q, three genotypes аre possible АА, Аа, аnd аа with expected frequencies p², 2pq, q², respectively.
From the research, we know that a researcher is interested in two alleles of the same gene, D and d. This means the researcher used Hardy-Weinberg Equilibrium. And from the genotype frequencies in the mosquito population, we can conclude that the mosquito population is evolving.
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in your own words, discuss hydrostatic equilibrium. it can be described as an equally matched battle between which two things?
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Hydrostatic equilibrium is a state of balance in which the inward force of gravity is matched by the outward pressure of gas and radiation.
This can be thought of as an equally matched battle between the weight of the gas in a star, which pulls everything inward, and the outward pressure of radiation and gas, which pushes everything outward.
The pressure comes from the heat generated by nuclear fusion in the star's core, and it's this pressure that keeps the star from collapsing under its own weight. In other words, hydrostatic equilibrium is what keeps a star stable and prevents it from either collapsing or exploding.
It's an essential concept in astrophysics and helps us understand how stars work and how they evolve over time.
In the brain, hydrostatic equilibrium is linked with the maintenance of the fluid- ventricles and CSF that is filled in the brain and spinal cord.
The cerebrospinal fluid helps to reduce the weight of the brain so that it feels less heavy and it also cushions the brain and protects it from mechanical damage, while also providing nutrients and removing waste products.
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Why does increasing temperature increase enzyme activity?
Answers
Answer:
Higher temperature generally causes more collisions among the molecules
Explanation:
Higher temperature generally causes more collisions among the molecules and therefore increases the rate of a reaction. More collisions increase the likelihood that substrate will collide with the active site of the enzyme, thus increasing the rate of an enzyme-catalyzed reaction.
At low temperatures, an enzyme-catalyzed reaction speeds up as the temperature rises. At higher temperatures, the protein is denatured, which also results in a dramatic decrease in response rate.
What does biological enzyme activity mean?Enzyme assays are standardized processes for determining the concentrations of certain enzymes in a sample. The broad catalytic capabilities of an enzyme are referred to as its activity. influencing factors for enzymatic analysis
What three main factors affect how an enzyme behaves?The three factors of temperature, pH, and substrate concentration would change an enzyme's activity. Enzymes function optimally within a range of temperature, pH, and substrate concentrations.
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