Answer:
D. How does the air temperature affect the rate at which a banana
turns brown?
Which of the following does NOT relate to water?
A. Dehydration damages cells.
B. 70% of the human body.
C. Controls negative feedback mechanisms.
D. Contains and moves ions in and out of cells.
The following that does not relate to water is it contains and moves ions in and out of cells. The correct option is D.
What is water?Water is a chemical compound made up of hydrogen and oxygen. It is a necessary part of life. As our body is made up of 90% of water, and without water, organisms would not survive.
The transport of ions and molecules in and out of the cell is done by the cytoplasm filling in the cell.
Thus, the correct option is D. Contains and moves ions in and out of cells.
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The ribosomes’s primary function in both prokaryotic cells and eukaryotic cells is to
A. Build proteins according to the cell’s DNA instruction
B. Create RNA
C. Replicate DNA and RNA
D. Produce amino acids to be used to make tissues
_________ is required so that group of cells called tissues may have different function.
A. Cell interaction
B. Cell differentiation
C. Cell Proliferation
D. Cell Movement
Answer:
first A then B
Explanation:
The ribosomes's primary function in both the prokaryotic cells and the eukaryotic cells is to build proteins according to the cell's DNA instruction. Cell differentiation is required so that groups of cells called tissues may have different function. Thus, the correct options for 1 and 2 are A and B, respectively.
What are Ribosomes?A ribosome is the cellular machinery which is responsible for the production of proteins in a cell. There are many ribosomes in each cell, each of these ribosomes are made up of two subunits- one large and one small subunit. These two subunits lock around the messenger RNA (mRNA) and then travel along the length of the messenger RNA molecule by reading each of the three-letter codons in the mRNA molecule.
Cell differentiation is the process which is required so that the group of cells called as tissues may have different functions. Cell differentiation results into formation of different cells and organs in the body.
Therefore, the correct options for 1 and 2 are A and B, respectively.
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Which of these would have the lowest kinetic energy?
Are there options too? If yes, then plz provide the options too, the next time you ask :) . Solids would have the lowest kinetic energy and gases have least kinetic energy.
A sample from a stock of a bacterial colony in liquid media was diluted by a factor of 106, and 2 ml of this dilution was spread on a Petri dish of solidified media. 56 colonies were observed. What was the concentration of bacteria of the initial stock?
Answer:
28 × 10⁶ colonies/ml
Explanation:
Let C be the concentration of bacterial in the initial stock. When it is diluted by a factor of 10⁶, the new concentration is C' = C/10⁶.
When 2 ml of this concentration is spread on a Petri dish of solidified media, 56 colonies were produced. The number of colonies, n after spreading the 2 ml of C' is C' × 2 ml = 2C' = 2C/10⁶.
So, n = 2C/10⁶.
Since the number of colonies after spreading on a Petri dish of solidified media is 56, n = 56 colonies.
So, 2C/10⁶ = 56
Making C subject of the formula, we have
C = 56 × 10⁶/2
C = 28 × 10⁶ colonies/ml
So, the initial concentration of bacteria is 28 × 10⁶ colonies/ml
An increase in the biodiversity of an ecosystem leads to an increase in its productivity.
True
False
Answer:
true
Explanation:
Select the logical fallacy used in this statement: If we ban semiautomatic weapons, it won't stop until handguns and rifles are banned as well, and then the criminals will have all the guns.
Select one:
a.
Slippery Slope
b.
Ad Populum
c.
Ad Hominem
d.
There is no fallacy in this statement
Answer:
A- Slippery Slope
Explanation:
A slippery slope fallacy is when someone claims, without proper evidence, that an action will lead to an often catastrophic consequence via a series of events.
Here, the statement claims that if semi-automatics are banned, so will handguns and rifles, however, doesn't provide any evidence that this is the case.
Which of the following shows the correct energy flow during aerobic respiration?
A. Lipids, Glucose, ATP, cells
B. ATP, Glucose, cells
C. Carbohydrates, Glucose, ATP, cells
D. Carbohydrates, Glucose, Lactic acid, ATP
The correct energy flow during aerobic respiration is ATP, Glucose, and cells. Thus, the correct option is B.
What is Aerobic respiration?Aerobic respiration may be defined as the process of conversion of glucose into carbon dioxide, water, and energy via the intermediate product of pyruvate in presence of air.
The release of energy in aerobic respiration is found to be greater as compared to anaerobic respiration.
This released energy is immediately used to synthesize a molecule called ATP via glucose that fuels the cells for metabolic activities.
Therefore, the correct option for this question is B.
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In a certain breed of dog, the alleles B and b determine black and brown coats respectively. However, the allele Q of a gene on a separate chromosome is epistatic to the B and b color alleles resulting in a gray coat (q has no effect on color). If animals of genotype B/b ; Q/q are intercrossed, what phenotypic ratio is expected in the progeny
Answer:
12 gray , 3 black, 1 brown
Explanation:
If Q allele of a gene on a separate chromosomes is epistatic to the B (black) and b (brown) color alleles, in cross between two animals with genotypes BbQq produces 12 gray coat color, 3 black coat color and 1 brown coat color animals.
BbQq x BbQq
Gray coat Gray coat
BQ Bq bQ bq
BQ BBQQ(gray) BBQq(gray) BbQQ(gray) BbQq(gray)
Bq BBQq(gray) BBqq(Black) BbQq(gray) Bbqq(Black)
bQ BbQQ(gray) BbQq(gray) bbQQ(gray) bbQq(gray)
bq BbQq(Gray) Bbqq(Black) bbQq(gray) bbqq(brown)
So the phenotypic ratio is Gray : Black : Brown
= 12 : 3 : 1
water can act as either a(n)__or a
Explanation:
Water can act as an acid and a base. As an acid, water donates H+, the hydrogen ion. As a base, water donates OH-, the hydroxide ion
hope this helps you
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The mass of the Sun is 1.99 × 1030 kg. Jupiter is 7.79 × 108 km away from the Sun and has a mass of 1.90 × 1027 kg. The gravitational force between the Sun and Jupiter to three significant figures is × 1023 N.
Answer:
4.16
Explanation:
edge2021
Answer:
4.16
Explanation:
What were the three large, flightless birds with similar features found on different continents, Australia, Africa, and South America?
Answer:
Rhea from south america
Emu from Australia
ostrich in Africa
Both gymnosperms and angiosperms are heterosporus. In gymnosperms, the pollen and the megaspores are produced in separate _______. In angiosperms, the pollen and the megaspores are produced in separate structures, but within the same ______.
Answer:
Places and location.
Explanation:
In gymnosperms, the pollen and the megaspores are produced in separate places. Megaspores made in cones that develop into the female gametophytes that is present inside the ovules of gymnosperms, while pollen grains develop from cones that produce microspores. while on the other hand, In angiosperms, the pollen and the megaspores are produced in separate structures, but within the same place i.e. flower which has both male and female reproductive organs.
The words that should be filled in the blanks are places and location respectively.
What do you mean by Megaspores?Megaspores may be defined as a spore in heterosporous plants giving rise to female gametophytes and usually larger than a microspore.
Gymnosperm produces both male and female cones. Both make the gametes needed for fertilization, which makes gymnosperm heterosporous. In angiosperms, cones are not found, pollen is produced by the anthers of the stamens in flowers.
Therefore, the words that should be filled in the blanks are places and location respectively.
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homeostasis is maintained through posterior pituitary endocrine hormones that act on the ______.
Answer:
may be glands
Explanation:
The glands of the endocrine system secrete hormones into the bloodstream to maintain homeostasis and regulate metabolism. The hypothalamus and the pituitary gland are the command and control centers, directing hormones to other glands and throughout the body.
Basidia within a basidiocarp are obvious for mushrooms, but this may not be as obvious for other examples that you have observed. For each of the examples of basidiomycetes that you have observed, speculate about the location of structures analogous to the basidia observed in mushrooms. Think about the formation of spores by meiosis.
a. bird's-nest fungi
b. common puffballs
c. earthstar puffball
d. shelf fungi
e. corn smut
Answer:
Birds nest fungi: Basidicarp, a cup shaped with several lenticular bodies appear as bird's nest with eggs. The eggs are called the peridioles and the nest serves release the eggs onto the twigs or branches and spores are liberated .
common puffball: The young fruit body is covered with whitish spines that become mark of scar after maturity.
Earth star puff balls: The fruiting body is in the shape of an egg, it has an outer part that separates away from the inner basidiocarp and splits into several rays which curve backwards and resembles a star.
shelf fungi: The fruiting body develops on the tree trunks and termed conk which are tough and leathery often plate-like growing out of the tree trunks.
corn smut: The diploid teliospores germinate and undergo meiosis to result in four haploid basidiospores.
A biologist discovered a new animal. Upon studying its embryonic development, she observed radial cleavage with the blastopore developing into an anus. This animal was categorized as a parazoan. pseudocoelomate. deuterostome. protostome. radiata.
Answer:
The correct answer is ''deuterostome''.
Explanation:
Deuterostomes are a superphylum of animals in which the anus is formed in or near the blastopore area in the developing embryo, and the mouth is secondarily formed elsewhere. The oral apparatus that these adult animals enjoy does not come from the embryo's blastopore. Instead it is a new formation. They enter the Bilateria classification, where species that enjoy bilateral symmetry are incorporated. In deuterostomes, the primary phases of division occur in parallel to the axis between the tips. That is, the segmentation they have is radial when the embryo is in state 1 with four cells.
The ultimate goal of the endangered species act is
to protect and recover imperiled species and the ecosystems upon which they depend
The secretion of ADH is caused by _ in osmotic pressure of blood. a)increase b)decrease
Answer:
the secretion of adh is cauesd by increase in osmotic pressure of blood
In crude oil affect eggs and larvae of fish and increase mortality.
O a.
Hydrocarbon
O b.
PAH
O c.
liquid petroleum
Answer:
its c liquid petroleum 100% surr
A man of A-blood group marries women of AB blood group. Which type of progeny would indicate that man is heterozygous A?
a.AB
b. O
C. A
d. B
Which of the following describes a parasite
1 a bear that kills and eats fish?
2 a worm that lives inside a bear.
3 a dish that is killed and eaten.
4 a bear that has worms in its gut
Answer:
2
Explanation:
A parasite is an organism that feeds on the intestine of living organiy
To determine whether eating sweet snacks (e.g. candy) causes more weight gain than eating oily snacks (e.g. potato chips), you feed two different groups of mice 1g of either candy or potato chips each day for seven days, and you compare the starting weight of each group with the final weight after the week.
Identify the following elements of your snack experiment:
a. iIndependent variable:
b. Dependent variable:
c. Control treatment(s):
d. Experimental treatment(s)
e. Standardized variables:
Answer:
a. the independent variable is the type of food you are giving the mice.
b. the dependent variable is the final weight of each group of mice.
c. the control is the amount of food you give to the mice.
d. the experimental treatment is what you are doing (which is feeding the mice two types of food to see which one causes more weight gain).
e. the standardized variable is the amount of time you are feeding the mice for (seven days for both groups)
Explanation:
I hope this helps ! :)
Is the word ‘Autotroph’ rightly used to describe animals based on nutrition? Justify
Answer:
Autotrophs are the producers in the food chain, meaning they create their own nutrients and energy
Answer: I don't think that they are known as 'Autotroph'
Explanation: Encyclopedic entry. An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals. Because autotrophs produce their own food, they are sometimes called producers.
A DNA fragment is introduced into the lacZ gene of a plasmid, which also contains an ampicillin resistance gene. What is the appearance of bacteria transformed with this plasmid if they are spread on plates containing ampicillin and X-gal
Answer: White colonies that are resistant to ampicillin.
Explanation:
The lac operon is an operon required for the metabolism of lactose in enteric bacteria such as Escherichia coli . It has three structural genes, a promoter, an operator and a regulator, all regulated by the availability of glucose and lactose. The lac repressor, a protein, senses lactose and blocks transcription of this operon. It acts as a repressor when lactose is present. A catabolite-activating protein (CAP), on the other hand, acts as a glucose sensor. The bacterium should express the lac operon only when lactose is available and glucose is not available. Thus, genes can always be transcribed, except when the Lac repressor protein is bound to the operon region, for which it has a high affinity (i.e. in the absence of lactose), where the Lac repressor protein maintains its high affinity for the operon region, preventing RNA polymerase from transcribing the structural genes. Thus, the system remains closed with consequent energy savings for the bacterium. In the presence of lactose, it binds to the Lac repressor protein and generates a conformational change that decreases its affinity for the operator region. Thus, the operator region is left free, RNA polymerase can freely transcribe the structural genes and the synthesized β-galactosidase (an enzyme) can degrade lactose to glucose plus galactose for energy.
Thus, the lac z gene encodes the enzyme β-galactosidase, which catalyzes the hydrolysis reaction of lactose to glucose and galactose. In gene cloning experiments, a compound called X-gal is used as an indicator of cells expressing the β-galactosidase enzyme. X-gal is hydrolyzed by the enzyme to galactose and another compound that is oxidized giving an insoluble blue compound. Thus, if X-gal and a β-galactosidase inducer are dissolved in the medium of a culture plate where the transformed bacteria is found, colonies grown on the plate that possess a functional lac z gene (either because they were not transformed by the plasmid, or if they were but the plasmid does not have the cloned fragment or gene that disrupts the lac z gene) can be clearly distinguished by their blue coloration. If they have another gene inserted interrupting the lac z gene, they will not be able to produce the enzyme that degrades X-gal, resulting in white colonies since X-gal is not degraded giving that characteristic blue color.
The white, non-transforming colonies are eliminated by adding an antibiotic to the medium for which the plasmid provides resistance (in this case ampicillin), so that we can select the recombinant colonies that carry the vector with our sequence, simply by their color.
So, if bacteria are transformed with a plasmid (with ampicillin resistance) cloned with a gene that interrupts the lac z gene, the bacteria will be white because they do not synthesize the enzyme that degrades X-gal and will be resistant to ampicillin.
Sucrose and monosodium glutamate (MSG) are added to a salad dressing made of vinegar and oil. If the mixture is then shaken, it will eventually separate into two phases. After this phase separation, where will most of the sucrose and MSG be located?
a. Both will concentrate in the vinegar.
b. Both will concentrate in the oil.
c. Both will concentrate at the interface between the two phases.
d. Sucrose will concentrate in the oil, and MSG will concentrate in the vinegar.
e. Sucrose will concentrate in the vinegar, and MSG will concentrate in the oil.
Answer:
both will concentrate in the vinegar layer because both are polar and Hbond with vinegar (an acid)
Explanation:
In carbon dioxide (CO2), there are two oxygen atoms for each carbon atom. Each oxygen atom forms a double bond with carbon, so the molecule contains two sets of double bonds.
Two sets of double bonds means that the total number of electrons being shared in the molecule is
two.
four.
six.
eight.
Answer:
the total number of being shared is six
Answer:
C.
Explanation:
The MN blood group in humans is under the control of a pair of co-dominant alleles, M (we will call the frequency of M, p) and N (we will call the frequency of N, q). In a group of 556 individuals, the following numbers of individuals are found for each of the genotypes:
167 MM
280 MN
109 NN
Required:
a. What is the frequency of each allele?
b. What is the value of the Chi-square statistic test to find if in this particular case the genotypic frequencies conform to the Hardy-Weinberg distribution.
c. What is the probability associated with you chi square statistic calculated above?
Answer:
do you know some people have golden blood
Match the type of evidence for evolution with the correct example
Vestigial structures: 1st box
Homologous structures: Last box
DNA sequence data: 2nd box
Analogous structures: 3rd box
explain why in the morning plant leaves are moisten
It occurs when there is active absorption of water by roots and transpiration is low i.e. moist and humid conditions. Therefore, guttation generally occurs in the early morning because transpiration is less at that time but water is actively absorbed by the roots.
describe why heart failure is so often referred as "congestive" heart failure ?
Answer:
Heart failure — sometimes known as congestive heart failure — occurs when the heart muscle doesn't pump blood as well as it should. When this happens, blood often backs up and fluid can build up in the lungs, causing shortness of breath.
Explanation:
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If a diglyceride is formed, how many water molecules are involved?
a.
One.
b.
It depends upon the length of the fatty acids involved.
c.
Two.
d.
Three.
e.
None.
Answer:
b.
It depends upon the length of the fatty acids involved
