Answer:
true
Explanation:
they do all things by one cell reproduction feeding etc
In a hypothetical population of butterflies, a dominant mutation in an allele that controls wing color has resulted in purple spots developing on the wings. The genetic change is heritable such that the offspring of butterflies who inherit at least one mutated allele will develop purple spots. The population of butterflies inhabits a windy field that contains many purple flowers. Individuals with purple spots are so well camouflaged on the purple flowers that they are eaten less frequently by predators. There are other fields with populations of the same species of butterfly nearby, but purple flowers are less prevalent in these nearby habitat areas. There are no borders between these fields and it is common for individuals from one population to be blown into another population by the wind. Despite the advantage the mutated allele confers to the butterflies in the field with many purple flowers, the mutated allele never occupies 100% of the gene pool and the population of butterflies always contains a mix of individuals with and without purple spots. What is the most likely explanation for why this trait does not spread entirely throughout the population
The movement of alleles into a population is called gene flow. The most likely explanation for why this trait does not entirely spread in the population is 'outside alleles enter the population through gene flow'.
Gene flow is caused by the migration and further reproduction of individuals in the population, or the transport of gametes from one population to another (e.g., the transport of pollen by pollinating bees).
Gene flow is an evolutionary force capable of modifying allele frequencies in a population.
In this case, despite the evolutionary advantage that the mutated allele confers to the butterflies, the frequency of this allele can not reach 100% due to the continued introduction of alleles from other populations (i.e., due to gene flow).
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in gel electrophoresis dna molecules migrate from _____ to _____ ends of the gel.
Answer:
one region to another
Explanation:
maybe I dont know
Which of the following is the correct sequence of events in aerobic cellular respiration?
A) Glycolysis, Fermentation, Krebs Cycle
B) Krebs Cycle, Glycolysis, Electron transport
C) Glycolysis, Krebs cycle, Electron Transport
D) Krebs Cycle, Electron Transport, Glycolysis
Answer:
A because I got it right
Explanation:
I just got a on a test
The gentic information contained in the cell resulting meiosis
Answer:
By the end of meiosis, the resulting reproductive cells, or gametes, each have 23 genetically unique chromosomes. ... Unlike in mitosis, the daughter cells produced during meiosis are genetically diverse.
Explanation:
what are the functions of carbohydrates
this is the answer,pls mark me brainliest
Please help!!! Quickly!!!!
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The Correct choice is " a "
Many organisms eat at multiple trophic levels.
Answer:
The feeding relationships of organisms in the real world is almost always more complex than suggested by a food chain. For that reason, the term food web is more accurate than is food
chain.
Explanation:
hope its hepl
What two fundamental parts make up a chromosome?
1. RNA and collagen proteins
2. DNA and histone proteins
3. RNA and histone proteins
4. DNA and collagen proteins
If the pH of a solution Is increased from pH 5 to pH7 it means that the?
Answer:
If we refer to pH scale, pH = 7 means neutral solution pH > 7 means basic solution pH < 7 means acidic solution - pH: potential of hydrogen - pOH: power of hydroxide
Answer: it has gained more acidic
Explanation:
how long does it take for a coffee tree to reach maturity
Answer:
Depending on the variety, it will take approximately 3 to 4 years for the newly planted coffee trees to bear fruit. The fruit, called the coffee cherry, turns a bright, deep red when it is ripe and ready to be harvested.
Explanation:
Hope it helps!
Order the following events that happen to create a pyrocumulus cloud.
First:
second:
last:
answer choices:
( put them in order for the first second and last pls!)
cooler temperatures cause moisture to condense.
heat causes air particles to become less dense.
Convection causes moisture in the air to move upward quickly.
Describe the relationship between DNA,
chromosomes, and genes.
RETRY
Answer:
In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.
Explanation:
so the relationship between.
Answer: Chromosomes > DNA > Genes
Chromosomes are thread-like structures of DNA coiled around proteins. Genes are specific portions of DNA that code for the production of proteins that are used and/or expressed by a body.
clusters of chlorophyll and accessory pigments are called ________.
The are sharp teeth that we use for biting.Racoons are opportunistic feeders and will eat just about anything they can find. They will catch and eat invertebrates such as beetles, but also eat different fruits and vegetables and other plant matter. Based on their feeding habits, they would be categorized as
Omnivore/Scavenger (They went through my garbage and ate a leftover rotten cheeseburger ;-;)
Name two types of cells
Answer:
Animal cells and plant cells
Which cellular process is carried out by ALL organisms?
Group of answer choices
cellular respiration
chemosynthesis
photosynthesis
Answer:
CELLULAR RESPIRATION
Explanation:
All organisms, including plants, use the process of cellular respiration to transform stored energy in food molecules into usable energy. The energy produced is stored in the form of ATP and is used by organisms to conduct their life processes.
a student conducts an experiment to test how the temperature affects the amount of sugar that can dissolve in water. in the experiment, she uses 100 milliliters of water in each trial and stirs for five minutes each time. what is the independent variable in this experiment?
Why did we have to establish a baseline of hydrogen peroxide and catalase in part d of the enzyme catalase lab?
Answer:
Here is an essay.
Explanation:
https://www.bartleby.com/essay/The-Effect-of-Enzymes-on-Hydrogen-Peroxide-F346D6AY9EQ
What is the function of enzymes in a living system?
Enzymes speed up metabolic reactions necessary for life. Without them, certain vital processes would not take place and the body would be unable to function.
Difference enzymes work better under different conditions. Where in a human body might it be beneficial to have enzymes work in very acidic environments?
In areas, like the stomach, that have a pH of two would benefit by having enzymes that function well in acidic environments. An example of such an enzyme is pepsin.
There is a large amount of catalase found in a human liver. Does the liver break down more hydrogen peroxide in the summer or winter? Explain your answer.
More hydrogen peroxide will be broken down in the summer…show more content…
Potassium permanganate - used to titrate and determine the amount of decomposed hydrogen peroxide.
Sulfuric acid - was used to stop the reaction with catalase and hydrogen peroxide. It denatured the enzyme (catalase) and halted the reaction so the amount of hydrogen peroxide decomposed could be measured.
Before performing part D of the experiment, why was it necessary to establish a baseline?
The baseline is a control and shows the amount of decomposed hydrogen peroxide in the initial sample.
You may have observed the reaction of naturally occurring catalase in tissue from either liver or potato. Design an experiment to determine if the amount of catalase varies from tissue to tissue (e.g. 200 g of the liver compared to 200 g of potato).
Put the 100 g of potato in 1 petri dish and 100 g of the liver in another petri dish. Then put equal amounts of hydrogen peroxide for an equal period of time in both dishes. Drain the dishes and titrate them with potassium permanganate simultaneously. The numbers can now be compared using the steps in the sample calculation above in the lab report. In order to compare perform a potassium permanganate titration on pure hydrogen peroxide.
Of the thousands of enzymes known, there is a family of enzymes called proteases that catalyze a reaction of breaking down proteins. What do you think would happen if you added a protease to your sample of catalase before proceeding with your experiment?
The catalase would be broken
If you stained both onion epidermal cells and cheek epithelial cells with methylene blue which would stain more quickly and why?
Answer:
the nucleus at the central part of the cheek cell contains DNA. When a drop of methylene blue is introduced, the nucleus is stained, which makes it stand out and be clearly seen under the microscope. And methylene blue stains negatively charged molecules in the cell, including DNA and RNA. This dye is toxic when ingested and it causes irritation when in contact with the skin and eyes. The cells seen are squamous epithelial cells from the outer epithelial layer of the mouth.
Explanation:
Pls also put this in a graph
Some scientists think that Earth goes through natural cycles of warming and
cooling. What is different about the current cycle of temperature change?
O A. It is cooling more slowly than previous natural cycles.
B. It warming more slowly than previous natural cycles.
c. It is cooling faster than previous natural cycles.
D. It is warming faster than previous natural cycles.
Answer:
D. It is warming faster than previous natural cycles.
ou are designing a building that must minimize energy transfer in the form of heat loss. Describe a building shape that you think would minimize heat loss through the surface of the building, and explain how that shape relates to the surface area-to-volume ratio.
Answer: In principle, to minimise heat transfer through the building envelope the building shape should be as compact as possible,tending toward a cube.
Explanation:
A building's design should be compact and rounded to reduce heat loss through the surface. The optimum shape would be a sphere, but that is impractical for a building. It would be more practical to construct a building that is cylindrical or dome-shaped.
What should be the shape of building to minimize the heat?The optimum shape would be a sphere, but that is impractical for a building. It would be more practical to construct a building that is cylindrical or dome-shaped.
By lowering the building's surface area, this design limits the region where heat may escape from the structure. The surface area to volume ratio should be taken into account while trying to reduce heat loss.
A building that is compact and rounded, such a cylinder or dome, has a lower surface area-to-volume ratio than a building that is rectangular or square and has the same volume. Accordingly, less heat is lost from the building's surface in comparison to the heat that is kept inside the structure.
Additionally, a compact, rounded building will have fewer corners and edges, which are vulnerable to heat loss. Additionally, the structure can be angled to receive as much sun exposure as possible, which can add to the building's heating capacity during the winter.
Therefore, a building's design should be compact and rounded to reduce heat loss through the surface.
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of the 30,000,000 species on earth, how many are lost each hour?
Read the passage from “The Caged Bird.”
A free bird leaps
on the back of the wind
and floats downstream
till the current ends
and dips his wing
in the orange sun rays
and dares to claim the sky.
How does the figurative language in this stanza work as part of the extended metaphor?
It creates images of freedom.
It creates images of oppression.
It emphasizes a sense of fantasy.
It emphasizes a sense of arrogance.
Answer:
It is most likely A
Explanation:
This part of the amazing poem, "The Caged Bird" shows the freedom the bird could have, but doesn't.
Answer:
It creates an image of freedom.
Explanation:
Why do human can stand straight?
Answer:
[tex]because \: of \: the \: prescnce \: of \: bones \\ thank \: you[/tex]
Explanation:
The pelvis provides support for the spine and some body organs like legs containing lockable knee joints providing a column of support, bearing the weight of the head, neck and trunk, allowing us to maintain an upright position.
1. If you were a forensic anthropologist, what would you be an expert in
Answer:
human remains
Explanation:
In this field, you study human remains
what is a sequence of growth, replication, and division that produces new eukaryotic cells called?
if yellow, red, and orange pigments exist in the leaves of trees, why are leaves green except for in the autumn?
Answer:
During the fall the day gets shorter hence less sunlight this results to leaves stopping their food making process. The chlorophyll breaks down, the green color disappears and the yellow to orange color becomes visible
Explanation:
12.What is an invasive species?
A native species which are added to an area
A keystone species in an environment
A non-native species added to an area
Answer:
An invasive species is an introduced organism that becomes overpopulated and negatively alters its new environment. Although their spread can have beneficial aspects, invasive species adversely affect the invaded habitats and bioregions, causing ecological, environmental, and/or economic damage.
To be invasive, a species must adapt to the new area easily. It must reproduce quickly. It must harm property, the economy, or the native plants and animals of the region. Many invasive species are introduced into a new region accidentally
A keystone species is an organism that helps define an entire ecosystem. Without its keystone species, the ecosystem would be dramatically different or cease to exist altogether. ... Any organism, from plants to fungi, may be a keystone species; they are not always the largest or most abundant species in an ecosystem
An invasive species is an organism that is not indigenous, or native, to a particular area. Invasive species can cause great economic and environmental harm to the new area.
Question 25
1 pts
Which aspect of a chemical reaction is affected by enzymes?
0 rate
O direction
O equilibrium
Орн •
Answer:
Its rate
Explanation:
a variety of factors can inhibit or enhance calcium absorption. indicate whether each situation increases or decreases calcium absorption by dragging it to the appropriate column.
Calcium is very important to the organism, and different factors influence its absorption. Pregnancy, Infancy, Vitamine D increase calcium absorption. Oxalic acid, phytic acids, and being over 70 years old decreases absorption
------------------------------------------
Calcium is a highly significant mineral for the appropriate development and functioning of the organism.
Different factors influence the mineral absorption, favoring it or limiting it.
Among the factors that might favor calcium absorption, we can mention
PregnancyIn the second and third trimesters of pregnancy, calcium absorption is the greatest. The intestinal absorption of calcium in women during this period increases to meet different demands. Calciotropic hormones are involved in the process.
Vitamine DVitamine D is one of the principal factors involved in calcium regulation. Vitamine D helps to double calcium absorption through the thin intestine.
InfancyDuring infancy, the body is growing, bones are developing, and the body needs to consume a high amount of calcium to accomplish these functions.
Calcium is a baseline mineral to provide children while growing, especially in their first periods of life.
Among the factors that limit calcium absorption, we can mention
Age exceeding 70 years oldElder people consume less food, and together with food consumption decrease, a less amount of necessary mineral is consumed.
With aging, calcium absorption decreases approximately 20% in the intestine.
Oxalic acid and Phytic acidMany substances, together with ingested calcium, form compounds that impede mineral absorption through the small intestine.
So in the presence of substances such as oxalic acid and phytic acid, calcium absorption is limited.
It is recommended not to consume food rich in calcium and food rich in these other substances simultaneously.
Pregnancy, Infancy, Eating vitamine D-enriched food ⇒increases calcium absorptionOxalic acid in spinach, high fiber diet rich in phytic acids, and being over 70 years old ⇒ decreases calcium absorption-----------------------------------------------
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