Answer:
Rock salt is the sedimentary rock formed by evaporation of seawater
Explanation:
Populations of organisms that exhibit a high degree of variation have a greater chance for survival than populations of organisms that show little variation. This statement is
-always true
-usually true
-rarely true
-never true
Answer:
Explanation:
Always trye
Populations of organisms that exhibit a high degree of variation have a greater chance of survival than populations of organisms that show little variation. This statement is usually true. Thus, the correct option will be B.
What is variation in organisms?Variation can be defined as any kind of difference between the different individuals in a species or group of organisms of any type of species. Mutations are the ultimate source of genetic variation, however the mechanisms such as sexual reproduction and the genetic flow can also contribute to mutation as well.
Evolutionary processes are the processes which are based on the selection of variations in a species by environmental variables. These differences may result in higher than usual survival benefits for the individuals as a result of positive trait adoption in an organism, or they may contribute to the genetic drift. Hence, all the variations in an organism have an equal chance of survival.
Therefore, the correct option will be B.
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respiration in echinoderms
Scientists have names for more than 30 types of snow crystals.
Answer:
it's false there are only five types of snow crystals
False I looked it up on goggle and it said that only 7 snow crystals are known
Why do materials move across a membrane?
Answer:
they passively move from an area of high concentration to low concentration and also by active transport
Explanation:
Answer:
Explanation:
Mass has a tendency to spread equally throughout available space. This is called diffusion
According to the bar graph, how many players averaged more than 30 points
per game?
Answer:
2 players
Explanation:
Answer:
2
Explanation:
= Arenas and Bryant
.........
In this food chain energy moves from one living thing to another. What source of energy starts this food chain?
A)
grass
B)
the Sun
C)
the air
D)
mushroom
Answer:
B. The Sun
Explanation:
This is because almost everything needs sun to live. It is a continuous cycle. If there is no sun for a long period of time, most things will die, or start to wilt if it is a plant like grass.
4. How did the pH of the water affect the hatching of the brine shrimp?
I
In starfish, the allele for brown coloring is dominant, and the allele for blue coloring is
recessive. For which parental genotypes are 100% of the offspring expected to be blue?
BB x bb
Bb x Bb
bb x bb
BB x BB
Answer:
C. bb x bb
Explanation:
B B B b
b Bb Bb B BB Bb
b Bb Bb b BB bb
100% Brown 75% Brown 25% Blue
B B b b
B BB BB b bb bb
B BB BB b bb bb
100% Brown 100% Blue
Cells use different processes at different times to provide an organism with the energy that it needs. Spirulina is an autotrophic bacteria that can be found in freshwater and marine environments. Which process takes place in the cells of Spirulina that does not occur in the cells of a human? photosynthesis aerobic respiration anaerobic respiration cellular respiration
photosynthesis
aerobic respiration
anaerobic respiration
cellular respiration
Answer:
I believe it is d, cellular respiration.
Explanation:
Answer:
D
Explanation:
Which statement best explains the relationship between cellular respiration and photosynthesis?
Cellular respiration breaks down glucose, while photosynthesis builds glucose.
Photosynthesis breaks down glucose, while cellular respiration builds glucose.
Both photosynthesis and cellular respiration break down glucose.
Both photosynthesis and cellular respiration build glucose.
Answer:
a
Explanation:
Answer:
A
Explanation:
Explain how matter is cycled between plants and animals.
The food of come from autotrophic plant to animal through food chain. The energy cycles between the air and soil and plants, animals, and microbes occur by food web.
What are the components of food web?A food web is defined as the cyclical event of energy transfer among different trophic level of organism.
The major components are primary producers, primary consumers, secondary consumers, tertiary consumers, quaternary consumers
Primary producers are the green autotrophic plants and capture some of the solar energy and convert it into chemical energy by photosynthesis.
The net primary productivity (NPP) of energy is defined as the rate of photosynthesis minus the rate of respiration of plants.
Primary consumers or herbivores feed on producers constitute the second trophic level of the food web.
in third tropic level, Secondary consumers eat primary consumers where as tertiary consumers, quaternary consumers or predators, carnivores or omnivores, which are both plant- and animal-eaters, such as humans.
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What property of cell membrane allows only certain materials to pass through
Answer:
the answer is selective permeability
Explanation:
A membrane that has selective permeability allows only substances meeting certain criteria to pass through it unaided. In the case of the cell membrane, only relatively small, nonpolar materials can move through the lipid bilayer (remember, the lipid tails of the membrane are nonpolar).
5. How can a scientist determine the magnification of a specimen that is being viewed under the
microscope?
a. all specimens are viewed at 100X magnification on a microscope
b. The adjustment knob will tell the scientist the magnification
The scientists should multiply the magnification of the eyepiece (10x) by the magnification
of the objective lens in use.
d. The scientist should refer to the microscope's manual for the correct magnification.
Answer:
c
Explanation:
eyepiece has it magnification and also objective lens.when both are multiplied the result is magnification
True or false : the pelvic girdle is larger and wider in make animals versus female animals?
Compare between a simple and compound microscope
Answer:
simple micro scopes or for seeing just small items and compound micro scope is for even smaller stuff!
Explanation:
A compound microscope allows you too see stuff like atoms they are super small and cant be seen by the naked eye so we need a strong tool called the compound microscope!
Can natural selection occur? Why/why not?
Answer:
The reason why it occurs is when the organism doesn't have the desirable traits it needs to survive.
Explanation:
what molecules from proteins when linked together with covalent bonds
Answer:
Amino Acids
Explanation:
they link with each other through means of peptide bonds and as a result form proteins
Mitosis division occurs in.....????
-prokaryote
-body cell
-all of the mentioned
-sex cell
Use the drop-down menus to complete the paragraph.
Geologists determine absolute age by comparing the amounts of radioactive and nonradioactive elements in rock. The radioactive, or , elements decay into nonradioactive elements. Because this rate of decay is for each element, geologists can compare the amounts of stable and unstable elements to determine how much of the elements have formed over time.
Answer:
1. Igneous. 2. Unstable. 3. Constant. 4. Stable.
Explanation:
Geologists determine absolute age by comparing the amounts of radioactive and nonradioactive elements in igneous rock. The radioactive, or unstable elements decay into nonradioactive elements. Because this rate of decay is constant for each element, geologists can compare the amounts of stable and unstable elements to determine how much of the stable elements have formed over time.
Explanation:
The method used by geologists in calculating the precise or absolute age of a fossil is called radiometric dating. This calculation is done by measuring the amount of energy emitted by some radioactive elements present in the igneous rocks.
Each element with radioactive properties has a constant decay rate of its radiation, which is the amount of radioactivity that it loses over time. After the necessary time, radioactive or unstable elements become stable particles.
Since each element has a constant decay rate, the time that has elapsed since its formation can be estimated.
Although fossils are normally found in sedimentary rock strata -which do not contain radioactive elements- their precise age is calculated using radiometric dating of adjacent igneous rock strata.
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Answer:
1. igneous
2.unstable
3.constant
4.stable
Explanation:
Which of these elements has an electron structure most similar to that of element X?
Answer:2
Explanation:
This stage of cellular respiration requires the presence of oxygen.
A. anaerobic respiration
B. glycolysis
C. fermentation
D. aerobic respiration
Answer:
Aerobic Respiration
Explanation:
Aerobic (in the presence of oxygen)
Anaerobic (absence of oxygen)
Glycolysis (central pathway for glucose{sugar} metabolism)
Fermentation (chemical breakdown of a substance by bacteria, yeast or other microorganisms and the escape of gases and heat)
How many angels can dance on the head of a pin?
1This is a question that has been pondered over the centuries. Can it be answered using scientific method? Is it a scientific question?
The Goal of Science
2The goal of science is to answer questions about the natural world. Scientific questions must be testable. Which of these two questions is a good scientific question and which is not?
What is the age of our planet Earth?
How many angels can dance on the head of a pin?
3The first is a good scientific question that can be answered by radiometrically dating rocks among other techniques. The second cannot be answered using data, so it is not a scientific question. Which of the following would be considered a good scientific question?
SELECT AN ANSWER
A-Why do airplanes fly?
B-How much does a thermometer weigh?
C What is your favorite food?
D) How does size affect the speed of an object rolling down a hill?i
Answer:
D) How does size affect the speed of an object rolling down a hill?
Explanation:
i think
PART II
Direction: Write the symbols of some elements and the group number it belong to
Name
Symbol
Group Number
Iron
Silver
Mercury
Oxygen
Gold
Potassium
Xenon
Magnesium
Hydrogen
#pa help po
Answer:
Iron -> Fe - Group 8
Silver -> Ag - Group 11
Mercury -> Hg - Group 12
Oxygen -> O - Group 16
Gold -> Au - Group 11
Potassium -> K - Group 1
Xenon -> Xe - Group 18
Magnesium -> Mg - Group 2
Hydrogen -> H - Group 1
Which of the following monomer is used as the main source of energy
glucose is the monomer used as the main source of energy
Butter is solid at room temperature because *
0 it has gone through a hydrogenation process.
Othey have double bonds in the hydrocarbon tails.
there are fewer hydrogens attached to the carbons.
there are more hydrogens attached to the carbons.
You read an article on a website that suggests that there may be a new form of cancer-causing mutagen that causes the DNA backbone structure to be disrupted in its normal sequence. Using your knowledge of the structure of the DNA molecule, explain how you might hypothesize such a mutagen might impact the ability for the DNA molecule to do its job effectively.
Answer:
The mutagen might alter the DNA sequence, thereby altering the accessibility to transcription factors and thus activate the expression of oncogenes involved in cell proliferation
Explanation:
The DNA molecule consists of two antiparallel strands of nucleotides that wind around each other. Each DNA strand is formed by a backbone containing sugar (deoxyribose) and phosphate groups. This arrangement allows for DNA replication and transcription (and consequently also protein synthesis) to occur. If a mutagen agent binds to DNA, this might modify its structure, thereby altering DNA replication and transcriptional activity.
Salt is an easily found and replenished mineral.
*
O True
O False
Answer:
false it cannot be replenished
Explanation:
I need help please & show work??
Hydrogen - 3 is a radioisotope with a half life of 12.32 years. How long would it take a 40 g sample to decay down 2.5 g ?
Answer:
Whether or not a given isotope is radioactive is a characteristic of that particular isotope. Some isotopes are stable indefinitely, while others are radioactive and decay through a characteristic form of emission. As time passes, less and less of the radioactive isotope will be present, and the level of radioactivity decreases. An interesting and useful aspect of radioactive decay is half-life, which is the amount of time it takes for one-half of a radioactive isotope to decay. The half-life of a specific radioactive isotope is constant; it is unaffected by coTnditions and is independent of the initial amount of that isotope.
Consider the following example. Suppose we have 100.0 g of tritium (a radioactive isotope of hydrogen). It has a half-life of 12.3 y. After 12.3 y, half of the sample will have decayed from hydrogen-3 to helium-3 by emitting a beta particle, so that only 50.0 g of the original tritium remains. After another 12.3 y—making a total of 24.6 y—another half of the remaining tritium will have decayed, leaving 25.0 g of tritium. After another 12.3 y—now a total of 36.9 y—another half of the remaining tritium will have decayed, leaving 12.5 g. This sequence of events is illustrated in Figure 15.1 “Radioactive Decay”.
Explanation:
HELPPPPPP ASAPPPPPPPP HELPPPP
Answer:
it is C. Little to No agintation
Cyanide poisons cell by limiting the production of ATP through cellular respiration. Cyanide does this by blocking the enzyme that attaches electrons and hydrogen atoms to oxygen to form water.
Which stage of cellular respiration would this most directly affect?
A Acetyl CoA formation
B Electron transport chain
C Glycolysis
D Krebs cycle