Answer:
The base found in RNA nucleotides, but not in DNA, is uracil.
Explanation:
A hand sanitizer was advertised to be more effective at killing bacteria than any antibacterial soap. Students were split evenly into 4 groups to test this claim. Groups 1-3 washed their hands using the assigned hand sanitizer or soap (see table) and warm water for two minutes, and then dried their hands with a paper towel. Group 4 rubbed their hands vigorously for 2 minutes in warm water, without any soap or sanitizer, and then dried their hands with a paper towel. After washing, each student’s hands were swabbed and the swab was applied to a culture plate and incubated. Finally, the bacterial cultures were counted. what is the independent variable?
Answer:
Group 4
Explanation:
The control group in this case would be those students in group 4.
The control group during an experiment is a group that does not receive the treatment administered to other groups and as such used as a standard for measuring the effects of the treatment on other groups. Whatever differences that exist between the control group and the various treatment groups is attributed to be as a result of the treatment administered to the groups.
In this case, group 4 only used warm water for washing their hands instead of the hand sanitizer/soap used by the other groups. Whatever differences found out in the bacterial count in their respective culture swabs can be attributed to the effects of the hand sanitizer/soap.
About what percentage of the land area of South America has a growing season of over 240 days?
Answer:
75%
Explanation:
Answer:
75% of the land area in South America has a growing season of over 240 days.
Explanation:
How do oxygen and carbon dioxide levels take over time
In the capillaries, oxygen flows rapidly through the blood through this air-blood barrier. Similarly, carbon dioxide flows into the alveoli from the blood and is then exhaled.
Answer:
Oxygen flows quickly through the blood through an air-blood barrier. Likewise, carbon dioxide flows into the alveoli from the blood and is then exhaled.
Explanation:
When a rancher puts cattle in a pasture, what happens to the amount of grass in it?
Answer:
When a rancher puts cattle in a pasture, what happens to the amount of grass in it? Cows put in a pasture of fresh grass will eat it down too a point it would regrow fast.. Unless the pasture is not large enough for the number of cattle. Then they will eat it into the ground and kill it.
Explanation:
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What type of inheritance controls blood types in humans?
Answer:
Human blood types (ABO) are an example of multiple alleles. Polygenic inheritance occurs when more than one gene controls the trait.
Explanation:
put it in your own words
Human blood types (ABO) is the inheritance that controls blood types in humans. Polygenic inheritance occurs when more than one gene controls the trait.
What is polygenic inheritance?A polygene is a member of a group of non-epistatic genes that interact additively to influence a phenotypic trait, thus contributing to multiple-gene inheritance, a type of non-Mendelian inheritance, as opposed to single-gene inheritance, which is the core notion of Mendelian inheritance.
Moreover, polygenic inheritance refers to the inheritance of a trait governed by more than one genes. Generally, three or more genes govern the inheritance of polygenic traits. Multiple independent genes have an additive or similar effect on a single quantitative trait.
Therefore, polygenic traits are determined by the interactions between several different genes, which display incomplete dominance.
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What are some ecological events that would impact cellular respiration?
Ex. A drought would effect photosynthesis.
Answer:
Temperature, glucose availability, and oxygen concentration.
Explanation:
:)
What step of photosynthesis produces the O2?
Answer:
The chloroplast is involved in both stages of photosynthesis. The light reactions take place in the thylakoid. There, water (H2O) is oxidized, and oxygen (O2) is released. The electrons that freed from the water are transferred to ATP and NADPH.
Explanation:
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How do the three types of distribution differ from one another?
Explanation:
direct channel allows the consumer to make purchases from the manufacturer while an indirect channel allows the consumer to buy the goods from a wholesaler or retailer. Indirect channels are typical for goods that are sold in traditional brick-and-mortar stores.
the relationship between the structure of the cell membrane and how it applies to the characteristics of semipermeable transport.
Answer:
the primary function of the plasma membrane is to protect the cell form its surroundings. composed of a phospholipid bilayer with embeded with proteins the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells.
Explanation:
Students are each given a 20-gram sample of an unknown solid compound in a clear plastic bag. They are instructed to break the material into smaller parts by gently hitting it with a hammer. Some of the parts break into large chunks and some look like a fine powder.
Which statement correctly describes these broken pieces of the sample?
Answer:
Explanation:
Some look like a fine powder
actual gas exchange takes place in the
A)Trachea
B)Bronchi
C)Larynx
D)Alveoli
Answer:
The trachea, bronchi, and bronchioles are involved in conduction. Gas exchange takes place only in the lungs. Lung tissue consists mainly of tiny air sacs called alveoli, which is where gas exchange takes place between air in the alveoli and the blood in capillaries surrounding them.
Explanation:
actual gas takes place in alveoli
Explain why photosynthesis is vital for life.
Answer:
Photosynthesis is important to living organisms because it is the number one source of oxygen in the atmosphere. Without photosynthesis, the carbon cycle could not occur, oxygen-requiring life would not survive and plants would die.
Explanation:
Answer:
Photosynthesis is vital for plant life, because it provides plants with a means to produce energy. Photosynthesis indirectly provides organisms that feed on plants with energy as well. Organisms that feed on plants derive their energy from the plants, which obtained their energy from sunlight through the process of photosynthesis. Photosynthesis also helps maintain atmospheric levels of carbon dioxide and oxygen. Carbon dioxide is taken in by plants during photosynthesis, and oxygen is released.
Explanation:
Which of the following phrases describe the function of the digestive system?
l. Smooth, muscular tube connects the mouth to the stomach
ll. Muscular action in the esophagus pushed food to the stomach
lll. Structures called the microvilli to increase the surface area of the intestines
lV. Nutrients are made available to the body's cells
A. l and ll
B. ll and lll
C. ll and lV
D. lll and lV
Answer:
B. ll and lll
Explanation:
The question above is asking for the "function" of the Digestive System. Function refers to how the digestive system actually works.
I is not related to the function of the digestive system. It only describes the "esophagus."
II is called the "Peristalsis." This is one of the functions of the digestive system. This allows the food to move down the GI tract.
III is part of the process called "Segmentation." This is one of the functions of the digestive system. The increase surface area of the microvilli expands 25 times and this allows greater absorption of food.
IV is not related to the function of the digestive system.
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Answer:
.1 goes with pic 4 .2 goes with pic 5 .3 goes with pic 4 4. goes with pic .1
and .5 goes with pic 2
Explanation:
2/3 divided by 1/6
Answer:
4
Explanation:
What are weather balloons?
Locations with instruments that measure weather conditions in specific land areas
Numerical equations based on weather-related factors that forecast weather
Objects that carry instruments into the stratosphere to measure atmospheric conditions
Structures that orbit Earth in the exosphere to capture images and collect data
Answer:
What are weather balloons?
Objects that carry instruments into the stratosphere to measure atmospheric condition.
Answer:
c i think i hope u get a good test score
Explanation:
DNA includes the instructions for building __________.
Analyze: Cellular respiration involves two phases. The anaerobic phase does not involve oxygen, while the aerobic phase does. Where does each phase take place?
Answer:
The anerobic part takes place in the fluid part of the cytoplasm while the aerobic part takes place in the mitochondria
Explanation:
Check all that are true statements regarding dermatomes.
A. Pain in a dermatome can only arise from the region of the skin that is innervated by that spinal nerve.
B. Dermatomes are involved in referred visceral pain.
C. If a person experiences damage or infection in an internal organ, the pain may be experienced elsewhere due to dermatomes.
D. Dermatomes are important in discovering muscle or organ damage, but are not useful in identifying spinal nerve damage.
Answer:
A. Pain in a dermatome can only arise from the region of the skin that is innervated by that spinal nerve.
D. Dermatomes are important in discovering muscle or organ damage but are not useful in identifying spinal nerve damage.
C. If a person experiences damage or infection in an internal organ, the pain may be experienced elsewhere due to dermatomes.
Explanation:
A dermatome is a region on the skin innervated by a spinal cord's root or dorsal nerve. The cutaneous nerves are those that reach the skin, collecting the sensitivity of it. Each cutaneous nerve is distributed in a particular area of skin, called a dermatome. From each segment of the medulla arises a pair of posterior roots sensory and a pair of anterior or motor roots, which join laterally to the intervertebral foramen level to form a mixed spinal nerve. Each of these innervates a dermatome strip of skin, so the surface corporal can be considered a true mosaic.
This term has three meanings:
Skin neoplasms (tumors)A strip of skin territory innervated by sensory fibers originates from a posterior root (nerves originating in the spinal cord and exiting between two vertebrae), also called the spinal nerve.For its part, the dermatome razor is a kind of razor that allows you to take cutaneous fragments, more or less thick, to perform skin grafts.A dermatome region posses the following characteristics traits as shown in option A, D, and C
Heat transferred from biosphere to biosphere:
a. wind/waves
b. rain/ sun waves
c. Factories and pollution
Answer:
The answer should be A.
Explanation:
Why do complex organisms need specialized cells?
A. Without them, complex organisms cannot perform different
functions.
B. Without them, complex organisms cannot reproduce.
C. Complex organisms need them to balance the mostly prokaryotic
cells.
D. Complex organisms need them to process bacteria and
paramecia.
Answer:
Your answer should be... Without them, complex organisms cannot perform different functions.
The liver makes a fat dissolving enzyme called____ ? (frog disection)
Answer:
Makes a fat dissolving enzyme called bile.
if I ride my bike to school instead of walking, then I will get there faster what is the dependent variable
Answer:
you will get there faster.
Explanation:
this is all related to your rate of speed the faster you pedal the faster you reach school if you walk faster than ride it'll be the other way around.
During a murder investigation, the medical examiner tests the contents of the
victim's stomach to try to identify their last meal and establish a connection to a
suspect. The contents tested using Lugol's iodine turned a dark purple color
which indicates the presence of starch. This test indicates which of these
macromolecules was present in the victim's last meal? *
A. Proteins
B. Carbohydrates
C. Lipids
D. Nucleic Acid
Human organisms, like the female pictured here, are composed of a variety of organ systems. Regardless of the organ system, certain
components remain constant. They are
es )
A)
tissues and organs.
B)
cells, tissues, and organs.
atoms, cells tissues, and organs.
D)
atoms, compounds, cells, tissues, and organs.
Answer: atoms, compounds, cells, tissues, and organs.
Explanation: i did it for myself
List two things that might happen if the snake was removed from this food chain.
What would be the result of removing the decomposers from the food chain?
Explanation:
1. The population of the pray that snakes feed on would grow
2. The predators that feed on snakes may die out
if the snake was removed from this food chain, the population of the prey that snakes feed on would grow and the predators that feed on snakes may die out. Remains of other organisms build up in an ecosystem if the decomposers are absent.
How each organism is important for the food chain?Each creature in the food chain depends on an earlier link in the chain. When a creature is eliminated from the food chain, the ecosystem's energy and nutrient cycles are disrupted.
The stability of the food chain is upset. As a result, the species that rely on other organisms for nourishment will starve to death.
The remains of other organisms build up in an ecosystem if the decomposers are absent.
Therefore, the ecosystem becomes unbalanced because the nutrients are not returned to the source to be used by the producers.
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what happens during telophase ll
SELECT THREE OPTIONS
Answer:
During telophase, nuclear membrane forms around each set of chromosomes. This separates the nuclear DNA from the cytoplasm. The chromosomes then start to uncoil becoming diffuse and less compact.
Explanation:
hope this helps!! <3
Answer:
nuclear membrane forms
Explanation:
i got it right
photosynthesis provide food and oxygen to all the living organism Is this true or False ???
Answer:
True
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A community decides to upgrade its water purification and management system.what lasting impact could this have on available freshwater?