Answer:
Females have two X chromosomes, while males have one X chromosome and one Y chromosome.
Explanation:
Humans have 23 chromosome pairs, out of which one pair determines the biological sex of an individual. Females have two X chromosomes, while males have one X and one Y chromosome. Mothers always pass on an X chromosome to their children, while fathers can pass on an X or Y chromosome. The sex of the child will depend on which chromosome it inherits from its father.
Why is phenylketonuria resulting from dihydropteridine reductase deficiency a more serious disorder than PKU resulting from phenylalanine hydroxylase deficiency?
Answer:
pteridine reductase deficiency alters all reactions known to be dependent on tetrahydrobiopterin (BH4)
Explanation:
Hyperphenylalaninemia is a condition characterized by elevated concentrations of the amino acid phenylalanine in the blood. Dihydropteridine reductase deficiency (DHPR) is a severe type of hyperphenylalaninemia caused by the deficiency of tetrahydrobiopterin (BH4). BH4 helps to convert amino acids, including phenylalanine, to precursors of neurotransmitters. BH4 is an essential non-protein co-factor of enzymes associated with the biosynthesis of dopamine, serotonin, noradrenaline and adrenaline. DHPR is an inherited recessive disorder whose symptoms include mental deficiency, poor swallowing (dysphagia) and an abnormally small skull (microcephaly).
1. Melissa raises crickets at her pet store that she
sells for reptile food. She thinks that crickets
chirp more often when the temperature gets
warmer. She decides to conduct an experiment to
prove her theory
a. Manipulated variable
(IV)
b. Responding variable
(DV).
c. Controlled variable
d. Controlled variable
Hypothesis: If
then
because
_(manipulated variable)
(responding variable)
Answer:
a. Manipulated variable: TEMPERATURE
b. Responding variable: CRICKET CHIRP
c. Controlled variable: Same species of cricket
d. Hypothesis: IF the temperature is increased, THEN crickets will chirp more
Explanation:
Independent variable, also called the manipulated variable, is the variable that is changed or manipulated in an experiment. In this case, the independent variable is the TEMPERATURE.
Dependent or responding variable is the variable that responds to changes made to the independent variable. The dependent variable in this case is CHIRP OF THE CRICKETS.
Controlled variable is the variable that must be kept unchanged for all groups throughout the experiment. The controlled variable in this case is SAME SPECIES CRICKET USED.
Hypothesis is a testable explanation (via experimentation) to an observed problem or a given question. In this investigation involving Melissa, an hypothesis is: IF the temperature is increased, THEN crickets will chirp more.
An Earth scientist is testing how various soil mixtures affect plant growth. She begins with 10 soil types. For each mixture, she combines equal amounts of 2 soil types. How many soil mixtures must the scientist create in order to test all possible combinations of the 10 soil types?a. 20b. 45c. 55d. 90
Answer:
b
Explanation:
The correct answer would be 45.
Assuming that the 10 soils are each represented by A, B, C, D, E, F, G, H, I, J.
A can combine with 9 others as: AB AC AD AE A F AG AH AI AJ
B can combine as: BC BD BE BF BG BH BI BJ
C as: CD CE CF CG CH CI CJ
D as: DE DF DG DH DI DJ
E as: EF EG EH EI EJ
F as: FG FH FI FJ
G as: GH GI GJ
H as: HI HJ
I as: IJ
Adding all the combinations together = 45
In other words;
[tex]^{10}C_2[/tex] = [tex]\frac{10!}{(2!(10 - 2)!)}[/tex] = 45
The soil mixtures must the scientist create in order to test all possible combinations of the 10 soil types- b. 45.
Given
soil samples = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
each mixture must have two sample
SolutionWe have to mix 2 soils in equal amounts. Then, the total number of possible soil mixtures are:-1 and 2, 1 and 3, 1 and 4, 1 and 5, 1 and 6, 1 and 7, 1 and 8, 1 and 9, 1 and 10 = >92 and 3, 2 and 4, 2 and 5, 2 and 6, 2 and 7, 2 and 8, 2 and 9, 2 and 10 => 83 and 4, 3 and 5, 3 and 6, 3 and 7, 3 and 8, 3 and 9, 3 and 10 => 74 and 5, 4 and 6, 4 and 7, 4 and 8, 4 and 9, 4 and 10 => 65 and 6, 5 and 7, 5 and 8, 5 and 9, 5 and 10 => 56 and 7, 6 and 8, 6 and 9, 6 and 10 => 47 and 8, 7and 9, 7 and 10 => 38 and 9, 8 and 10 => 29 and 10 => 1Then Total mixtures possible are =
9 + 8 + 7 + 6+ 5 + 4 + 3 + 2 + 1
= 45
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Erosion is:
A.
the process of moving materials from their source to another location through weathering.
B.
the breaking down of rock soil and minerals.
C.
magma coming up from the Earth’s mantle through openings in the crust.
Answer:
uhhh maybe A..
Explanation:
in earth science, erosion is the action of surface area process that removes soil, rock, or dissolved material from location on the earth's crust, and then transports it to another location
kacey likes to mountain bike, intill she can’t bike anymore.
If a plant has the TtSs genotype, what would the genotypes of its gametes be?
A. Tt, Ss, TS, and ts
B. TT, tt, SS, and ss
C. TS, Ts, tS, and ts
You find a bone in a rock you think it's about 700,000 years old . Would you use radiocarbon dating to find the age of the bone?
Answer:
Explanation:
yaea
In a population, there are 500 cats. What is the frequency of black cats if 300 are calico?
Answer:
2 out of every 5 or 2/5
Explanation:
there are 200 black cats because there are 300 calico there are 500 total so it would be 200/500 or 2/5
Exposure the radiation such as an X-ray may change the sequence of
nitrogen bases in DNA. What is this specifically called?
1) a mutation
2) a translation
3 ) a replication
4) a transcription
Answer:
Mutation
Explanation:
The process of change in a population over time is called
.
The process by which organisms that are better adapted to the environment survive and reproduce is called
.
Answer:
evolution
natural selection
.
Explanation:
This is the answer that worked for me.
The process of change in a population over time and the process by which organisms that are better adapted to the environment survive and reproduce is called "evolution."
What role does evolution play in the life of an animal?Natural selection, the best-known mechanism of evolution, explains the gradual change in the genetic makeup of a population caused by mechanisms such as genetic drift, mutation, and gene flow. The survival and reproduction of individuals with advantageous traits, allowing those traits to become more common in the population over time through the evolution process and adding value to the animal's life.
Hence, the process of change in a population over time and the process by which organisms that are better adapted to the environment survive and reproduce is called "evolution."
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True or False about neutrons.
1. Discovered by Dimitry Mendeyev
2. Neutrons are the lightest of all subatomic particles
3. Neutrons subatomic particles with no charge
4. Neutrons are found inside the nucleus
5. Neutrons have six times the mass of a proton
what a b0nerr mean???????
Answer:
srry look it up I dont wanna get it trouble
Explanation:
What differentiates passive transport from active transport?
O Molecules move down a concentration gradient during passive transport.
Passive transport involves molecules moving across the cell membrane.
ATP is needed for passive transport to occur
Proteins have a role in passive transport.
What control showed that transformation and not conjugation or transduction was responsible for the results
When we talk of transformation,we are talking of a biological method of the alteration of gene in a living cell especially as seen in a bacterial cells.
As a result of the incoperation and uptake of foreign genetic material from it's surrounding, the said bacteria then takes up the exogenous DNA,this it does by binding it with specific receptors that are present in its cells membrane or it can do so through diffusion.
However,the foreign DNA will either get incorporated in the DNA of the host chromosome or it will act like a plasmid and them express itself in the cell of the new host.
Then in conjugation,we see the transfer of circular plasmid DNA,this is transferred from one bacterium to another and it is done through cell to cell contact.
Also, transduction is still another way of transferring genetic materials,here the DNA is transferred to another bacteria via bacteriophage through lysogeny.
Now,in a given experiment,to identify if the reaction is transformation and not configuration and transduction,a controls sample will be provided,this control sample will contain DNase coupled with the reaction mixture,if there is a revelation of an exogenous DNA by the test sample,and there is no expression by the control,then we know that is transformation,we know it is transformation because DNase cleave free DNA and it will not be able to cut the DNA that is present inside the cell of donor bacteria that is in conjugation or bacteriophage(transduction).
Therefore,the addition of DNase in control sample can determine if the transfer of genetic materials in the test samples is transformation and not transduction or conjugation.
explain why did saturnino Fabros , a 20-year traffic enforcer veteran , was not a victim of cyber bullying? instead of Robert Blair carabuena who was in a video who slapped to saturnino
.
Answer:Carabuena was caught on camera slapping MMDA traffic enforcer Saturnino Fabros after he was pulled over for a traffic violation. Image of page 12. Describe the acts of cyber bullying that the netizens did to Carabuena. ... such as "Patayin si Robert Blair Carabuena", "Like if you want Robert Blair Carabuena to be fired.
Explanation:
Which of the following statements about anatomical position are true?
Anatomical position is different in different hospitals.
Anatomical position is not helpful when learning new terms in anatomy.
Anatomical position is a standard point of reference for the anatomical planes.
Superior and inferior planes describe parts of the body relative to anatomical position.
Answer:
its C and D
Explanation:
edge 2020
Anatomical position is a standard point of reference for the anatomical planes and Superior and inferior planes describe parts of the body relative to the anatomical position are true statements about the anatomical position.
Anatomical position is a term used in different areas of medicine to refer to a reference position on the directional terms used to describe parts and regions of the body.
The anatomical reference position is the one in which the body is:
In an upright posture standingThe upper extremities extended to the side of the trunkThe palms of the hands forward.Head and feet directed forward.Additionally, other terms such as superior and inferior planes are used to describe the position of the parts of the body concerning the anatomical position.
According to the above, answers C and D are two true sentences about the anatomical position.
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17.Addition of hydroxide ions to a solution will Select one : O have no effect on acidity OB increase the acidity O C. buffer the solution . O D. decrease the acidity
Answer:
D
Explanation:
Hydroxide ions make solutions more basic by decreasing its acidity (this is accomplished by reacting with H+)
List one change in behavior that you would reasonably expect in bug populations that have been living on golden rain trees.
Answer:
List one change in bug morphology and behavior that you would reasonably expect in bug populations that have been living on golden rain trees. Females will be the same size as males, and there will be less competition to reproduce early. 15. Bugs are small relative to their host plants.
Explanation:
Brainliest please?
How do enzymes affect a chemical reaction, making it easier to occur?
Answer:
Enzymes speed up a chemical reaction making the reaction easier to occur.
17. Addition of hydroxide ions to a solution will
Select one:
O A. have no effect on acidity.
O B. increase the acidity.
O C. buffer the solution,
O D. decrease the acidity.
Answer:
D
Explanation:
Addition of hydroxide ions will decrease its acidity and make it more basic.
How do proteins play an important role in the mating of japanese beetles
A substance in food that your body needs for growth, repair, and energy is a
-bacteria
-Virus
-nutrient
Answer:
nutrient
Explanation:
Nutrients are compounds in foods essential to life and health, providing us with energy, the building blocks for repair and growth and substances necessary to regulate chemical processes. There are six major nutrients: Carbohydrates (CHO), Lipids (fats), Proteins, Vitamins, Minerals, Water
Answer:
nutrient
Explanation:
Your body does not need bacteria for growth, repair or energy. Bacteria poses harm to your body. Viruses do the same as bacteria, except they might be worse. The answer is nutrient.
What is the name of the process shown in the picture below?
A) lipid metabolism
B) translation
C) DNA replication
D) transcription
Answer:DNA replication
Explanation:
Answer:
DNA replication
Explanation:
It looks to me that the top is the leading DNA and the bottom is the replication. The bottom is replicating the top (original)
If you are a diploblastic animal, you have:__________ A. mesoderm. B. radial symmetry. C. a coelem. D. a mouth that developed from the blastopore. E. all of the above
Answer:
C. Radial Symmetry
Explanation:
Diploblastic Animals are those animals whose blastula have basically two primary germ layers. These layers are called the endoderm and the ectoderm. On the contrary, most other animals have three layers found in them. The endoderm is an embryonic germ layer that gives rise to the gut. They also give rise to the tissues that form the internal organs. On the other hand, the ectoderm produces skin and nervous tissue and does cover the outside of the embryo. This type of body plan is particularly seen in cnidaria and ctenophora
Sensory _____ are the parts of the body that change a stimulus into a nerve impulse and response. effectors receptors pathways potentials
Sensory receptors are the parts of the body that change a stimulus into a nerve impulse and response.
True or False: All viruses look the same. А True B False
Answer: False
It is not true
Answer:
B False
Explanation:
Steps of the light-dependent reactions in order
sunlight photosynthesis
Explanation:
manufacture food theough sunlight
Nervous
Match each body system with Its main organ.
Circulatory
Digestive
Lungs
Excretory
Heart
Respiratory
Brain
Stomach
Bladder
Need answer plz for my grades
Answer:
The flow of energy
Explanation:
What part of the bone produces blood cells?
Answer:
Red blood cells are formed in the red bone marrow of bones