Answer:
23
Explanation:
Mass number is the total of the protons and neutrons together, and it is given the symbol A. Example: A sodium atom contains 11 protons and 12 neutrons; its mass number A is 23.
Answer:
23
Explanation:
atomic mass is the total of protons and neutrons therefore it's 23
what are catabolic reactions
Answer:
which complex molecules are broken down to simpler components, are classified as catabolic reactions. Taken as a group of reactions within a cell or even an organism, they can be referred to as the cell's or organism's anabolism or catabolism.
Explanation:
Bill once had a blue car that was in the shop more than it was on the road. Since
then he will not even consider owning a blue car. Bill's aversion to blue cars is
an example of:
Answer:
artificial made
Explanation:
because it is greated by man not God
What do some scientists today believe causes more adaptations' competition or environmental changes?
Answer:
According to an April study, table corals (Acropora hyacinthus) can adapt to resist bleaching in warmer waters. On Ofu Island in American Samoa, A. hyacinthus lives in both hot and cool pools. In the lab, researchers tested corals from both environments to see how they reacted to increased heat.
Explanation:
i dont really know i tried
Some scientists today believe that adaptations are more caused or provoked by the fact of competition.
What is meant by Adaptation?Adaptation may be defined as the process that significantly involves the modification of internal and external attributes of organisms that makes them fit for survival and reproduction in the natural environment.
Competition is because of the fact that as the diversity of organisms increases, the resource limits remarkably enable the organisms to activate the mechanism of competition. Due to this, each and every species makes itself superior in order to make their survival in the natural environment.
Therefore, some scientists today believe that adaptations are more caused or provoked by the fact of competition.
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With increasing maternal age, the chances of observing trisomies increase significantly. Increasing paternal age is associated with de novo point mutations. Why?
Answer:
Mother: higher risk of an improper chromosome division
Father: higher risk to suffer point mutations in sperm cells
Explanation:
A trisomy is an alteration in the chromosome number (i.e., an aneuploidy), and occurs when a cell receives three chromosomes instead of two. The risk of aneuploidies -including trisomies- increases with the mother's age due to the fact that older eggs have a higher chance of dividing unequally, thereby leading to an imbalanced number of chromosomes between daughter cells. Moreover, a point mutation is defined as a genetic modification where a single nucleotide is changed in the DNA sequence. It has been shown that point mutations in children are determined to a large extent by the father’s age, which are due to mutations in germline cells (i.e., sperm cells) that were passed to the progeny. A child born from a father who is 20 years old exhibits on average 40 point mutations, whereas a child born from a father who is 40 years old has typically twice the point mutations on its genome.
In the figure, X is pointing to a building block of DNA. Which of these correctly labels X?
A. Amino acid
B. Nucleotide
C. Polysaccharide
D. Pyrimidine
Answer:
Nucleotide
Explanation:
I took the test and it was right.
The name of the building block of DNA that is depicted by X in the attached image is nucleotides.
DNA:
DNA or deoxyribonucleic acid is a biological molecule that stores genetic information in living cells. DNA molecule is a biological polymer and hence, is made up of monomers called nucleotides. Nucleotide is the subunit of a DNA molecule. Nucleotide is made up of three components namely: nitrogenous bases, phosphate group and pentose sugar. In the image attached to this question, X is used to represent the building block of DNA, hence, it is a nucleotide.Learn more at: https://brainly.com/question/22499464?referrer=searchResults
environmental science aim to solve problems such as the extinction of a specific animal or plant species and deal with important issues such as
Answer:
Explanation:
Circle the word that best completes the statement about cell theory.
6. The cell theory states that:
i. All organisms are made of organelles / cells.
ii. All existing cells are produced by other living dead cells.
111. The atom cell is the most basic unit of life.
7. Cell theory is one of the great unifying theories of biology / chemistry.
MAIN IDEA: Prokaryotic cells lack a nucleus and most internal structures of
eukaryotic cells.
Question reformatted:
Circle the word that best completes the statement about cell theory.
6. The cell theory states that:
i. All organisms are made of organelles / cells.
ii. All existing cells are produced by other living / dead cells.
iii. The atom / cell is the most basic unit of life.
7. Cell theory is one of the great unifying theories of biology / chemistry
Answer:
6. The cell theory states that:
i. All organisms are made of cells.
ii. All existing cells are produced by other living cells.
iii. The cell is the most basic unit of life.
7. Cell theory is one of the great unifying theories of biology
Explanation:
Cell theory is one of the central theories of biology and is universally accepted. It states that all organisms are cellular - that is they are made of cells. It also states that all living things come from other living cells (not spontaneously, or from dead cells). The cell is the most basic unit of life, organisms can be unicellular, but no living thing is 'less' than that.
which of the following are Vertebrates?
Worms
Answer:
a vertebrate is an animal with spinal cord surrounded by cartilage or bone
Explanation:
fishes,whales,sharks
amphibians
reptiles
birds
mammals
If two fruit flies, heterozygous for a gene that codes for eye color , were bred together and had 200 offspring , about how many would have the dominant phenotype
Answer:
75%
Explanation:
Assuming that eye color follows mendellian inheritance, two heterozygous parents would breed as follows:
Ee x Ee
Punnett sqaure
E e
E EE Ee
e Ee ee
All organisms possessing allele E will express dominant phenotype.
From two fruit flies, 75% would have the dominant phenotype.
What do you mean by phenotype?The phenotype is the set of observable characteristics or traits of an organism. The term covers the organism's morphology or physical form and structure, its developmental processes.
Phenotype refers to an individual's observable traits, such as height, eye color and blood type. A person's phenotype is determined by both their genomic makeup (genotype) and environmental factors.
Examples of phenotypes include height, wing length, and hair color. Phenotypes also include observable characteristics that can be measured in the laboratory, such as levels of hormones or blood cells.
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What types of water are the most affected by nonpoint source pollution?
Groundwater is susceptible to pollutants. Groundwater contamination occurs when man-made products such as gasoline, oil, road salts and chemicals get into the groundwater and cause it to become unsafe and unfit for human use.
Cane toads are large, nonnative, poisonous toads in Australia. After cane
toads entered Australia, scientists observed that the average head size in a
population of toad-eating snakes was getting smaller. Snakes with smaller
heads are not able to eat the large cane toads. What type of situation is this?
O A. Disruptive selection
B. Species richness
C. Directional selection
D. Genetic variation
The answer you are looking for is C
Natural selection is a process by which the organisms adjust to the variation in the environmental conditions so they can endure and thrive in the altered conditions.
The correct answer is:
Option C. Directional selection
This can be explained as:
Directional selection is a negative form of natural selection in which the inhabitants of one species is favoured over another.The species with better trait characteristics will be favoured over the organism with less preferred attributes.The allele recurrence in directional assortment shifts over time.Therefore, toads with better traits (head size) are favoured over snakes with smaller mouth sizes.
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10. According to Bohr's model of the atom, electrons behave like....
A. Waves on a vibrating string
B.Planets orbiting the
C.sun light energy in a vacuum
B.Planets orbiting hiiiiii
what happens to the temperature of water as time elapses?
QUESTION 6
Which statement is true about graded potentials?
a. They always produce action potentials.
b. They always depolarize a neuron.
c. They change the voltage of a neuron by different amounts.
od. They are "all-or-none."
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Mitosis occurs in all the cells of the organism.
Answer:
Mitosis is the process in cell division by which the nucleus of the cell divides (in a multiple phase), giving rise to two identical daughter cells. Mitosis happens in all eukaryotic cells (plants, animals, and fungi). It is the process of cell renewal and growth in a plant, animal or fungus.
Picture yourself around a campfire. Which of these would be an example
of convection?
A metal rod would not be a good choice for roasting marshmallows because metal transfers
thermal energy.
O As the air around the campfire is heated and becomes less dense, it rises and
moves upward.
A metal rod would not be a good choice for roasting marshmallows because
metal transfers thermal energy.
Answer:
O As the air around the campfire is heated and becomes less dense, it rises and moves upward.
Explanation:
This is true because, the convection transfer needs the particle of elements to transport the heat from where it is in abundance to where it is in less abundance. Just like a water boiling becoming hot at the point closer to the fire than the top of the pot, so also will the air around campfire transfer heated air from the place closer to the campfire to upwards aware from the fire.
Convection is the flow of air around the campfire when it is heated and the decrease in density as it rises upward in the atmosphere. Thus, the correct option is C.
What is convection of heat?Convection is the transfer of heat from one place to the other due to the movement of fluids present in it. It is a distinct method of heat transfer in systems. The convective heat transfer involves combined processes of conduction and advection in a system and its surrounding. Convection is the dominant form of heat transfer in liquids and gases.
The thermal radiation in the fire is mostly in the form of infrared waves and visible light. However, the campfire heat transferred via convection shoots straight up in the sky and never reaches to the ground level.
Therefore, the correct option is C.
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Which statement best describes the difference between the crust and the lithosphere?
A. The lithosphere contains both the crust and the upper most rigid layer of the mantle
B. The lithosphere contains both the crust and the inner core
C. The lithosphere contains both the core and the mantle
D. The lithosphere contains both the crust and the ocean
Answer:
A. The lithosphere contains both the crust and the uppermost rigid layer of the mantle
Explanation:
The statement that describes the difference between the crust and lithosphere is that the lithosphere contains both the crust and the uppermost rigid layer of the mantle.
The earth is divided primarily into 3 concentric layers; crust, core, and mantle. The crust is the outermost layer of the earth. It is a very thin layer. The lithosphere, on the other hand, is the crust plus the upper rigid layer of the mantle. This is the main difference between the crust and lithosphere.The two parts of cell theory are 1. All living things are made of cells and 2. Cells cannot reproduce? (true or false). if true why?
Answer:
1. true
2.false
Explanation:
1.because of the gravity of the earth
Which evidence from the Hershey-Chase experiment demonstrated that DNA, not protein, is the genetic material
Answer:
The evidence from the Hershey-Chase experiment demonstrated that DNA, not protein, is the genetic material DNA contains phosphorus, but protein does not was as result of some analysis in which it was discovered that Protein contains sulfur and DNA does not.
This was what led to the use of radioactive phosphorus and radioactive sulfur in self-identification.
Explain, in paragraph form, how each factor impacts on your career choice
Answer:
Factors such as the influence of the family, that of peers and of the school itself, the information available through school visits to places of work, and work experience of students, the availability of occupational information and of the demands for jobs; the difference in age, gender, and personal characteristics ...
Explanation:
Which means of particle transport is shown in Figure 7–4 below?
The figure shows the inside of a cell, the cell membrane, and the outside of the cell. Inside the cell, 15 spheres are labeled “high concentration.” Outside the cell, three spheres are labeled “low concentration.” A sphere enters a figure labeled “transport protein” that spans the cell membrane. An arrow shows that the sphere is moving from outside of the cell into the cell. A lightning bolt-shaped arrow is labeled “energy” and points to the transport protein.• A shaded hemisphere is shown at the top of the illustration titled 'Inside of Cell.' In the hemisphere are sixteen small spheres labeled 'High Concentration.'
• At the bottom of the illustration is the label 'Outside of Cell' on the unshaded part of the image. There are three small spheres labeled 'Low Concentration' in this area.
• A curvy horseshoe looking shape labeled 'Transport Protein' is shown entering the inside of the cell and has an upward arrow labeled on it.
• A small sphere is at the bottom of the curvy horseshoe shape with a jagged arrow next to it labeled 'Energy.'
A. diffusion
B. osmosis
C. facilitated diffusion
D. active transport
Answer:
The answer is D
Explanation:
Indicate which the following statements are true.
a. During glycolysis, glucose molecules are hydrolysed to yield CO2 and H2O
b. The cleavage of fructose 1,6-bisphosphate by phosphofructokinase yields two molecules of glyceraldehyde 3-phosphate.
c. When subjected to anaerobic conditions, glycolysis in mammalian cells continues and causes a buildup of pyruvate in the cytosol.
d. In the mitochondrial matrix, the pyruvate dehydrogenase complex produces CO2, acetyl-CoA and NADH.
e. Fatty acids can be transported into mitochondria and converted into acetyl-CoA, FADH2 and NADH
Answer:
The correct answer is: D
Explanation:
(a) This process does not occur during glycolysis, it occurs after glycolysis since pyruvate is generally accepted to be the last product of glycolysis
(b) Phosphofructokinase does not produce two molecules of glyceraldehyde 3-phosphate but rather produces of one molecule of glyceraldehyde 3-phosphate and dihydroxyacetone phosphate
(c) During anaerobic conditions in mammals, pyruvate is converted to lactate by the enzyme lactate dehydrogenase. It can actually cause the accumulation of lactic acid/lactate in the muscle which causes muscle fatigue but does not cause buildup of pyruvate in the cytosol.
(d) In the fate of pyruvate, the pyruvate dehydrogenase complex produces CO2, acetyl-CoA and NADH in the mitochondrial matrix. The acetyl-coA produced thereof serves as a precursor for the citric acid cycle.
Which of the following statements about enzymes is false?
А Enzymes are made up of amino acids.
B Enzymes make otherwise slow reactions proceed more quickly.
C Enzymes provide energy for endergonic reactions.
D. Enzymes are usually specific for the chemical reactions they catalyze.
The false statement about enzyme is - option C. Enzymes provide energy for endergonic reactions.
Enzymes are protein acts as biological catalysts. Enzymes increase the rate of reactions by lowering the activation energy.
Enzymes are made from amino acids. The chain of amino acids then folds into a unique shape.These are specific for the chemical reactionsEnzymes are biological catalysts that increase the rate of chemical reactions inside cells by lowering the activation energy therefore can not provide energy.Enzymes make slow reactions proceed more quickly.Thus, the false statement is - option C.
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Which climate zone is hot and receives a lot of precipitation throughout the year?
Answer: Tropical
Explanation:
what role does energy play in changing particle motion?
Answer:
A rise in temperature increases the kinetic energy and speed of particles; it does not weaken the forces between them. The particles in solids vibrate about fixed positions; even at very low temperatures. Individual particles in liquids and gases have no fixed positions and move chaotically.
Explanation:
When ATP is hydrolyzed, are you adding water or removing it? Explain 20 points I’ll do brainlest too
Answer:
Are there answers
Explanation:
Answer:
adding water
Explanation:
hydrolysis means adding water to it
1. The increase in the reproductive success of a species will have the greatest impact on
the-
Answer:
The increase in the reproductive success of a species will have the greatest impact on the prey of the animal.
Explanation:
The prey's population will decrease because there are more animals needing it to survive.
With respect to proteins, the quaternary structure refers to the
Answer:
refers to the number and arrangement of protein subunits
Diagram 1 shows the tilt of Earth's axis. Diagram 2 shows how Earth would look if the tilt of the axis were increased. Each diagram shows the same two locations, Location X and Location Y. Sun Y X- um Earth Diagram 1 Sun •Y X- Swi Earth Diagram 2 Which statement BEST predicts the effect of increasing the tilt of Earth's axis in Diagram 2 on the two locations? Location Y will be cooler in winter and Location X will be cooler in summer. Location Y will be warmer in winter and Location X will be cooler in summer, Location Y will be cooler in winter and Location X will be warmer in summer. Location Y will be warmer in winter and Location X will be warmer in summer. PLEASE HELP MEEEEE
Answer:
confused
Explanation:
compounds formed from the attraction of oppisitely charged ions are called ________.
A. covalent compounds
B. ionic compounds
C. mineral compounds
D. molecular compounds
Answer:
B. ionic compounds
Explanation: