Answer:
Some physical characteristics, such as the color of the human skin or eyes, are controlled by at least two genes. These traits are known as polygenic traits. The number of genes that determine the color of the iris is unknown, but the most significant of them are found in Chromosome 15 and they are named OCA2 and HERC2. These genes are associated with the production of melanin.
Explanation: Polygenic inheritance describes the inheritance of traits that are determined by more than one gene. These genes, called polygenes, produce specific traits when they are expressed together. Polygenic inheritance differs from Mendelian inheritance patterns, where traits are determined by a single gene. Polygenic traits have many possible phenotypes (physical characteristics) that are determined by interactions among several alleles. Examples of polygenic inheritance in humans include traits such as skin color, eye color, hair color, body shape, height, and weight.
Ninety nine percent of the atmosphere is composed of _____ and _____.
Answer:
Ninety nine percent of the atmosphere is composed of Nitrogen and Oxygen
Answer:
78% nitrogen and 21% oxygen
Explanation:
WHAT IS THE OZONE LAYER?
Answer:
the ozone layer is a thin part of the Earth's atmosphere that absorbs almost all of the sun's harmful ultraviolet light. "Ozone holes" are popular names for areas of damage to the ozone layer.
Cellular respiration is a biological process in which glucose is broken down to form energy in the form of ATP. The reactants have a starting energy of 3564 kilojoules of energy, and the products have a resulting 2878 kilojoules of energy.
Which best describes cellular respiration?
It is an exothermic reaction because energy is lost.
It is an exothermic reaction because energy is gained.
It is an endothermic reaction because energy is lost.
It is an endothermic reaction because energy is gained.
Answer: (It is an endothermic reaction because energy is gained.)
It converts energy in food into a more usable form.
Answer:
d
Explanation:
please help me with questing 16
Answer:
It's either C. or D. I think I'm more leaning toward all of the above.
Explanation:
Adaptation is when organisms change to adapt to the environment.
For example, a white moth could turn black to blend in with certain tree barks, shadows, dirt, etc. Hope this helped!
Viruses, unlike bacteria, are not living organisms. Based on the information in the table, which of the following provides evidence to support this statement?
Explanation:
1.) Unlike bacteria,virus cannot survive without a host.
2.)Virus are not made out of cells
3.)They lack means of reproduction outside the host cell.
Characteristics such as a widow’s peak or attached earlobes are determined by the genetic code. Which components of DNA are referred to as the genetic code?
A. Phosphate groups
B. Nitrogenous bases
C. Deoxyribose sugars
D. Hydrogen bonds
PLEASE HELP!!!
What increases as you move from the surface to the interior of the Earth?
Answer:
Heat/temperature
Explanation:
"There are three main sources of heat in the deep earth: (1) heat from when the planet formed and accreted, which has not yet been lost; (2) frictional heating, caused by denser core material sinking to the center of the planet; and (3) heat from the decay of radioactive elements." These give the core and a few of the outer layers of the earth more and more heat.
I couldn’t fit the whole question in so the last two options are
-Natural disasters are so rare that they have not affected human population very much
-Natural disasters are a concern for human, life and property, but there is nothing we can do to predict them or prepare for them
Thank you! Will mark brainliest
Answer:
how natural disasters are a concern for human, life and property
1. Carbon is a very important element in biology. What are some of the reasons that organisms need carbon? please help me
Answer:
"All living orgasms contain carbon and all virtual molecules in the body contain carbon, sugar, DNA, proteins, Fats..."
Explanation:
Hope this helps :)
Codons is a set of three nucleotides that can code for multiple different proteins.
True
False
5. The sodium-potassium pump is an example of
i. simple diffusion.
j. passive transport.
facilitated diffusion.
k. none of the above
Answer:
its passive transport
Explanation:
The sodium-potassium pump sets the membrane potential of the neuron by keeping the concentrations of Na+ and K+ at constant disequilibrium.
In the diagram which of the following is the secondary consumer
The caterpillar
The Snake
The Leaf
The Mongoose
Answer:
THE ANSWER IS THE SNAKE
Explanation:
PLEASE MARK ME AS BRAINLIEST
I want to give people some points so my question is...
IS THE SKY BLUE?
Answer:
yeah, common sense when its raining it isn't it is grey, when its sunny it is sky blue
Explanation:
2) One of two or more alternative forms of a gene, represented by a single letter.
Answer:
Its an allelle that has two or more alternative forms of same gene
What are three differences between rocks and soil
Answer:
Rocks are made of one or more minerals. based on the way the rock was formed: sedimentary metamorphic and igneous Soil is formed of fine rock particles mixed with air, water and particles from dead plant and animal matter.
In a species of flowers, red petals (R) are dominant to orange petals (r). If two plants that are heterozygous for red petals are crossed, what are the possible genotypes of the offspring?
Answer:
RR, Rr, rr
Explanation:
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Describe what occurs during normal cell division.
Answer:
mitosis
Explanation:
Mitosis the process of cell division where a cell complete spits itself into 2 daughter cells with the same number of chromosomes as the parent cells it has 2 major parts
Answer: Mitosis
Explanation: other words for it is normal cell division, this is a normal occurrence
According to the reading, the sun is NOT a typical star.
O True
O False
the biotic factors of each land biome are determined by its ___
climate
organisms
location
size
Answer:
climate
Explanation:
The tendency for a body at rest to remain at rest is known as
A. inertia.
B. torque.
C. momentum.
D. acceleration.
E. force.
Answer:
A. Inertia
Explanation:
Answer:
A. inertia.
Explanation:
Newton's Law of Inertia: Inertia is the tendency of an object to remain at rest or remain in motion.
The curving of Earth's planetary winds is due to:
A)the Coriolis Effect.
B)Earth's tilt on its axis.
C)density differences.
D)gravity.
Answer:
It is due to the coriolis effect
Explanation:
Gravitational force multiple choice
Answer:
Option B. The force would be quartered (factor of 1/4).
Explanation:
The gravitational force between two objects can be expressed with the equation:
By analyzing the equation, we can see that if we multiply both m1 and m2 by 1/2, the resulting new F would be lower by a factor of 1/4 (as 1/2 times 1/2 equals 1/4).
Thus the correct answer is option B.
NEED HELP
1. Prokaryote is a simple cycle compared to eukaryotic. The prokaryote is a
simple cycle because of three reasons.
A.
B.
C.
Answer:
A. Small size.
B. A single cell or unicellular.
C.it has one chromosome which is not true and it is called plastid.
Explanation:
This is because prokaryote are unicellular organisms that lack nucleus and membrane bound organelles. The are smaller in size compare to eukaryotic, which have large surface to volume ratio. They lack mitochondria, Golgi apparatus, endoplasmic recticulum, e t.c. They have only one chromosomes which is not even a true one and it is called plastid. Examples of prokaryote include bacteria.
If a tRNA molecule has an anticodon which reads CAG, what was the codon on the mRNA molecule?
(4 points)
answers:
AUG
GTC
UAG
GUC
Answer:
GUC
Explanation:
The base sequence for tRNA will be the complement of the mRNA sequence:
tRNA: CAG
mRNA: GUC
Answer:
GUC
Explanation:
biological macromolecules are organized into four main categories. What type of macromolecule contains phosphorus as part of a phosphate group?
1.) lipids
2.) proteins
3.) nucleic acid
4.) carbohydrates
Answer:
3.) nucleic acid
Explanation:
Biological macromolecules can be defined as a very large molecule (structure) that comprises of covalently bonded organic atoms and smaller molecular structures (monomers).
Biological macromolecules are organized into four main categories and these includes;
I. Lipids: these categories of biological molecules is mainly made up of fats and it is responsible for providing the body with long-term energy.
II. Carbohydrates: it is contained in energy-giving foods and it aids the functioning of the muscles, nervous system and other organs found in the body.
III. Proteins: it contains amino acids and it is responsible for maintaining the functioning of the body system.
IV. Nucleic acid: it comprises of deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) which are the genetic codes (blueprints) for living organisms.
Hence, the type of macromolecule that contains phosphorus as part of a phosphate group (sugar 2-deoxyribose) is nucleic acid.
From the biological macromolecules, Nucleic acids contains phosphorus as part of a phosphate group.
Nucleic acids are biopolymers, macromolecules, crucial for all known types of life. Nucleotides, which are the monomer components, make up their structure. a sugar with five carbons, a phosphate group, and a base with nitrogen. Deoxyribonucleic acid and ribonucleic acid are the two main types of nucleic acids.
Deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are two types of nucleic acids that carry genetic information that is read by cells to create the RNA and proteins that allow living things to function.
Know more about nucleic acids:
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During which cell cycle stage is a cell plate Present and what is its purpose
2. Create a complementary
strand of DNA for the
DNA strand show below.
A T C G T G A
Answer:
T A G C A C T
Explanation:
Adenine (A) and Thymine (T) are base-pairs, alongside Cytosine (C) and Guanine (G). Only A - T or G - C are base-pairs in DNA strands, you will never see Adenine (A) and Cytosine (C) together in a DNA or RNA strand.
Explain how a mutation has caused the Lactase Persistence gene in some people and not in others.
Answer:
It is a case of human niche construction
Explanation:
Lactase is an enzyme of mammals which is required to digest lactose. In humans (like in other mammals), lactase activity decreases during mid-childhood; although there are individuals which are still capable of producing this enzyme even during adult life, a trait known as 'lactase persistence'. Different mutations in the coding region of the lactase gene have been associated with lactase persistence in European, African and Asian populations. On the other hand, the niche construction theory states that the organisms, through their activities and choices, actively modify their own local environment by introducing novel selection pressures. Some examples of niche construction include, among others, alternation of nutrient cycling by plants or lactase persistence in humans. Lactase persistence can be defined as a case of niche construction because this trait was not only genetically inherited but also culturally transmitted through local environments shaped by ancestral populations, i.e., generated by niche construction or ecological inheritance.
Under certain external conditions, a person will perspire a great deal. For which internal condition does this response primarily provide homeostasis?
Answer:
Abnormally high temperature
Explanation:
Sweating or perspiration is a homeostatic response to abnormally high body temperature. Evaporation of the sweat causes cooling of the body and this causes the temperature of the body to return back to normal.
When the setpoint temperature of the body is breached by being too high, the negative feedback mechanism kicks-in, and the sweat glands of the skin becomes activated. The body sweats, and the evaporation of the sweat from the surface of the skin causes cooling and a return back to the setpoint.
n the experiment "What Effect Does Vinegar Have on Plant Growth?" some plants were given only water, some were given only vinegar, and the others were given various mixtures of water and vinegar. Which of the following groups is the control group in the experiment?
50% water and 50% vinager
100% water
100% vinager
or 25% vinager and 75% water
50% water and 50% vinager