Which of the following lists the order of taxonomic levels from the largest to the smallest group?
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Answer:
domain, kingdom, phylum, class, order, family, genus, species
Explanation:
Related Questions
A healthy six-month old Infant was visiting her grandparents in late 2010. Upon returning home, she developed a slight dry cough and runny nose. Her mother thought it was a common cold and chose not to seek medical attention for the baby. By the end of the week, however, she and her husband knew this was not just a cold. Their daughter began to cough with such force that her face turned red, and she began to expectorate thick phlegm. At times, she even vomited. With each day, she became increasingly fatigued as well. Her mother finally brought her to the emergency room when her face turned blue during a bout of violent coughing. The following are the answers the parents provided for the patient history questionnaire: Question: What have been the patient's symptoms? Answer: ______________Question: When did the patient being to exhibit symptoms? Answer: ______________Question: Has the patient traveled recently? Answer: _______________________Question: Has anyone else in the family traveled recently? Answer: ________________________Question: Has the patient experienced any other recent illness? Answer: ______________________Question: Is the patient up to date with vaccinations for her age (6 months)? Answer: ___________________________
Gaseous exchange in an insect
Why does DNA replication have such accuracy ?
The one-cell zygote, traveling slowly down the fallopian tube towards the uterus, begins to duplicate and multiply. At about the eight-cell stage, the process of differentiation begins, early cells take on distinct characteristics and move toward particular locations, foreshadowing the types of cells they will become. These early cells, capable of becoming any part of an organism, are known as:_______.
b. the way it moves
c. presence of an eye spot
d. none of these
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Answer:
the correct answer is A.
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According to natural selection, skeletal changes occur gradually as individuals adapt to their environment and pass these changes on to their descendants.
We can arrive at this answer because:
- During the transition to a new habitat, some individuals in a group of living beings adapt to the habitat.
- This adaptation allows individuals who have skeletal modifications to have adaptive advantages and manage to survive in the new habitat.
- These modifications are passed on to descendants through genetics, which means that new individuals are born with the skeletal modification, while individuals without this modification die before producing descendants.
As a result, the skeletal modification takes place gradually in the population of individuals as new members are born and old members die.
More information:
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Saturated fatty acids are long hydrocarbon chains with a carboxyl group (-COOH) at one end. They consist of carbon atoms bonded to each other by single bonds, and each carbon atom is saturated with hydrogen atoms. This gives them a straight and rigid structure.
Physical State: Saturated fatty acids are usually solid at room temperature. This is because the straight structure of saturated fatty acids allows them to pack closely together, resulting in stronger intermolecular forces and higher melting points compared to unsaturated fatty acids.
Dietary Sources: Saturated fatty acids are commonly found in animal-based products such as meat, poultry, dairy products, and butter. They can also be found in some plant-based sources like coconut oil and palm oil.
Health Implications: Consuming excessive amounts of saturated fatty acids has been associated with an increased risk of cardiovascular diseases. This is because saturated fats can raise levels of LDL cholesterol (commonly referred to as "bad" cholesterol) in the blood.
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b. List all the parameters you think might be relevant to this model. Describe in words the meaning of each parameter and any restrictions on their values.
c. Justify whether this should be a discrete time model or continuous time model.
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a. State Variables and State Space:
1.Cell Density (N): The number of yeast or bacterial cells present in the chemostat at a given time. The state space for N is the set of non-negative real numbers (N ≥ 0).
2.Concentration of Substrate (S): The concentration of the nutrient (e.g., glucose) in the liquid medium. The state space for S is the set of non-negative real numbers (S ≥ 0).
3.Dilution Rate (D): The rate at which medium is added to the chemostat relative to the volume of the chemostat. The state space for D is the set of non-negative real numbers (D ≥ 0).
4.Effluent Concentration (S_out, N_out): The concentration of substrate and cell density in the effluent leaving the chemostat. The state space for S_out and N_out is the set of non-negative real numbers (S_out ≥ 0, N_out ≥ 0).
b. Parameters:
1.Maximum Specific Growth Rate (μ_max): The maximum growth rate of cells under ideal conditions (maximal nutrient availability and absence of inhibitory factors). It is a positive real number (μ_max > 0).
2.Half-Saturation Constant (K_s): The concentration of substrate at which the specific growth rate is half of μ_max. It is a positive real number (K_s > 0).
3.Yield Coefficient (Y): The amount of biomass (cells) produced per unit of substrate consumed. It is a positive real number (Y > 0).
4.Dilution Rate (D): This is both a state variable and a parameter. As a parameter, it represents the rate at which medium is added to the chemostat, and it can vary within the state space (D ≥ 0).
5.Inlet Concentration (S_in): The concentration of substrate in the incoming medium. It is a positive real number (S_in > 0).
6.Effluent Flow Rate (Q): The rate at which medium and cells exit the chemostat through the effluent tube. It is a positive real number (Q > 0).
7.Cell Death Rate (μ_death): The rate at which cells die in the chemostat due to factors such as predation or aging. It is a positive real number (μ_death > 0).
c. Justification for Model Type:
This should be a continuous time model because the growth and dynamics of yeast and bacterial populations in a chemostat occur continuously over time. Cells divide continuously, and changes in cell density, substrate concentration, and other state variables are continuous and smooth. Discrete time models, which operate in discrete time steps, may not capture the nuances of these continuous processes accurately. Therefore, a continuous time model, possibly using differential equations, would better represent the system's behavior in a chemostat.
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Final answer:
True, individuals with familial Down Syndrome are trisomic and have 47 chromosomes. This occurs when there's an extra copy of chromosome 21 as a result of a parent carrying a rearranged chromosome, or translocation.
Explanation:
True. Individuals with familial Down Syndrome are indeed trisomic, which means they have an extra copy of a certain chromosome. In the case of Down Syndrome, there's an extra copy of chromosome 21, resulting in a total of 47 chromosomes instead of the usual 46. People inherit this condition through familial Down Syndrome when one parent carries a rearranged chromosome, referred to as a translocation. In this type of Down syndrome, there are three copies (i.e., trisomic) of chromosome 21.
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