Answer:
The phospholipid bilayer describes a structure with polar heads on the outside and non-polar tails on the inside (option a).
Explanation:
The plasmatic membranes of the cells behave as a semi-permeable barrier to the passage of substances, a characteristic that depends on the hydrophobic properties of its phospholipid bilayer.
Lipidic bilayers are formed by the union of phospholipids with a hydrophobic —non-polar— head and a hydrophilic or polar tail, so they are called amphiphilic.
The bilayer phospholipids are arranged keeping the head —with a phosphate molecule— on the outside while the hydrophobic tails, formed by a double chain of fatty acids, on the inside.
The other options are not correct due to the explanation above:
Non-polar tails on the outside and polar heads on the inside. The organization of the phospholipids does not admit this distribution of the molecule, which is observed when the phospholipids are in contact with water and form mycelium.Polar layers on both the inside and outside and non-polar layers on both the inside and outside are not possible, due to the molecular organization of the phospholipid.The phospholipid bilayer describes a structure with:
оа
ob
ос
od
Polar heads on the outside and non-polar tails on the inside.
Non-polar tails on the outside and polar heads on the inside.
Polar layers on both the inside and outside.
Non-polar layers on both the inside and outside.
Answer:
Polar heads on the outside and non-polar tails on the inside.
Which element does not exist as a gas in the atmosphere?*
carbon
hydrogen
nitrogen
oxygen
phosphorus
Answer:
Carbon does not exist as a gas in the atmosphere. I hope this is the answer
_________________ land is fertile and capable of growing crops
2. What percentage of the Sun is composed of hydrogen?
0 1.5%
70%
28%
0.5%
Answer:
70%
Explanation:
Answer:
70%
Explanation:
About 70% of the sun is made of hydrogen
Hope this helps:)
How could pollutants be introduced into an ecosystem and
what would be the effect be on an ecosystem?
er notes
Well with water pollution it's mostly with plastic. A big influence is what people leave in the beach or throw in the ocean. Various animals get caught in trash. The effect is negative because many animals die from eating or being captured in it. And it just makes the water dirty.
I will give a brainliest
Answer: nucleus
Explanation:
Answer: I think it is Nucleus
Proteins are made from amino acids and are also know as peptides
True
False
Answer:
True
Explanation:
Throughout the reflection, make sure you have a copy of the Student Guide and your data tables. Use the drop-
down menus to complete the statements,
were intentionally manipulated,
In this experiment,
These were the independent variables.
The dependent variable measured was
Answer:
Explanation:
Temperature and surface area and time of reaction
Answer:
Mass and type of material
type of material
temperature
Explanation:
This is for: Lab: Thermal Energy Transfer
Assignment: Reflect on the Lab
Throughout the reflection, make sure you have a copy of the Student Guide and your data tables. Use the drop-down menus to complete the statements.
The independent variables in Part I, the ones intentionally manipulated, are the
✔ mass and type of material
.
The independent variable in Part II, the one that is intentionally manipulated, is the
✔ type of material
.
The dependent variable for both Parts I and II, the one that you measure the response in, is the
✔ temperature
What are some examples of non-cyclic changes.
If you can, please explain how they are noncyclic
Answer:
a change of seasons. a volcanic eruption. phase changes of the Moon. high and low tides.
Explanation:
Some examples of non-cyclic changes are volcano eruptions, the occurrence of tides, work done by an object, diffusion of liquids and gaseous compounds, fuel undergoing combustion, etc.
What are Non-cyclic changes?Non-cyclic changes may be defined as the sequence of changes that are consistently involved but do not return the system back to its initial state. Irreversible processes are examples of non-cyclic changes.
Work done by an object is an example of a non-cyclic process because it is given by the area between the curve and volume axis. The noncyclic processes proceed in one direction only. This means that the product formed by these changes does not react together in order to reform the reactant again.
The fuel once burned will never get it again after combustion. Diffusion of liquids and gaseous do not form the initial products. Volcanic eruption forms molten lava which never occupies its initial stage.
Therefore, some examples of non-cyclic changes are mentioned above.
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Gaseous exchange occurs between
A alveoli and nose
B the atmosphere and nose
C alveoli and blood
D the atmosphere and bronchioles
Answer:
it is option c alveoli and blood
-)What must be present for the three stages of cellular
respiration to be exhibited?
Answer:
It needs oxygen in order to occur.
Explanation:
Cellular respiration is this process in which oxygen and glucose are used to create ATP, carbon dioxide, and water; ATP, carbon dioxide, and water are all products of this process because they are what is created.
The reactions of cellular respiration can be grouped into three stages: glycolysis (stage 1), the Krebs cycle, also called the citric acid cycle (stage 2), and electron transport (stage 3)
The other three stages of cellular respiration—pyruvate oxidation, the citric acid cycle, and oxidative phosphorylation—require oxygen in order to occur.
What is the vocabulary term for "the surface layer
of aquatic environments that is penetrated by
sunlight"?
Answer:
Photic Zone
Explanation:
The surface layer of a body of water that is penetrated by sunlight, allowing the vegetation below to carry out photosynthesis.
1.Precipitation that infiltrates through soil into underground layers of rock, 2 puntos
sand, and gravel is stored as
Surface runoff
Ground water
Precipitation
Condensation
Answer:Ground water.
Explanation:
Step by step
Insects have three body parts in six legs true or false
True, all INSECTS have this.
What technology is used to remove solids from water
Answer:
Clarifiers
Explanation:
Clarifiers are used in many applications to settle/concentrate to sludge and remove the solids from the process. While the plant location and type of removal process may vary, there is a need to remove the fine particulate matter from the water streams for either reuse or disposal.
Answer:
Clarifiers
Explanation:
Clarifiers are used in many applications to settle/concentrate to sludge and remove the solids from the process. While the plant location and type of removal process may vary, there is a need to remove the fine particulate matter from the water streams for either reuse or disposal.
hope this helps and good luck on your next question!
please give brainliest
15. ) The process of staying the same is __________.
a.) anaphase
b.) contact inhibition
c.) homeostasis
d.) mitosis
e.) interphase
Considering the experimental design, which claim is best supported using the data?
A
The yeast population declined from day 3 to day 4 due to disease, which is affected by the number of cells in the petri dish.
B
The yeast population declined from day 4 to day 5 because it was limited by space, which is not affected by the number of cells in the petri dish.
С
The yeast population increased from day 1 to day 2 because of low competition for glucose, which is affected by the number of cells in the petri dish.
D
The yeast population increased from day 2 to day 3 due to decreasing temperature, which is not affected by the number of cells in the petri dish.
Answer:
C low competition for glucose
Explanation:
From the given answer choices and information,
It cannot be A since there is no visual disease or any indication of disease in the experiment
Cannot be B, since space would not be an issue since it clearly hit 111 on day 3
and cannot be D since there is no indication of a change in temperature.
However, we know Petri Dishes have nutrients to stimulate cell growth, and those resources are not unlimited therefore we can only attest that a large portion of the nutrients have been consumed and starved some of the cells thus causing a population decrease
Which is an example of a scientific law?
1.Light speed
2.Solar nebula
3.Big bang
4/Evolution
Abe knew from his anatomy class that there are three different kinds of muscle tissue in the body. He knew lifting weights would help build the skeletal muscle and that running was good for cardiac muscle health. He was surprised to find out that his blood vessels had smooth muscle, so his exercise regimen was actually benefitting all the muscle types of his body. Correctly sort each of the characteristics into the appropriate category.
Answer:
Three different kinds of muscles are -:
SKELETAL MUSCELES CARDIAC MUSCLES SMOOTH MUSCLESExplanation:
SKELETAL MUSCLES -: There are long, cylindrical, and striated skeletal muscle cells. They are multi-nucleated, which means they have more than one nucleus. This is because from the fusion of embryonic myoblasts, they are created. Each nucleus controls the sarcoplasm's metabolic demands around it. There are high energy requirements for skeletal muscle cells, because they contain several mitochondria in order to generate adequate ATP. Examples of skeletal muscles: arms and legs- The muscles that belong to the arms and legs feature in pairs. Abdomen and Back- These muscles are connected to the various sets of skeletal muscles that run across the torso.CARDIAC MUSCLES -: Cardiomyocytes have a short and narrow outline and are fairly rectangular. They are about 0.02 mm wide and 0.1 mm (millimetres) long, respectively. There are many sarcosomes in cardiomyocytes, which provide the required energy for contraction. Cardiomyocytes usually contain a single nucleus, unlike skeletal muscle cells. Cardiomyocytes, although they contain more sarcosomes, normally contain the same cell organelles as skeletal muscle cells. example - cardiac muscle is present in heart. SMOOTH MUSCLES -: Smooth muscle cells have a single central nucleus and are spindle-shaped. They range in length from 10 to 600 μm (micrometers), and are the tiniest type of muscle cell. In the expansion of organs like the kidneys , lungs, and vagina, they are elastic and therefore essential. As in cardiac and skeletal muscle, the myofibrils of smooth muscle cells are not aligned, meaning they are not striated, hence the term smooth. example of smooth muscles -: Walls of blood vessels , Walls of stomach , Ureters , Intestines , In the aorta (tunica media layer), Iris of the eye. ,Prostate and Gastrointestinal Tract.Soft tissues composed of long cells are called muscles. They are of various types like cardiac, skeletal and smooth based on their functions and locations.
What are the characteristics of the various muscles?Skeletal muscles are cylindrical and striated muscles that have many nuclei and are voluntary. They have many mitochondria in them and have higher energy expenditure and generation. They are found in the arms, legs and abdomen region.
Smooth muscles are longitudinal and spindle-shaped muscles and are uninucleated. They are non-striated, lacks sarcomere and are elastic. They have the greatest capability of regeneration and are found in the intestines, eyes, stomach and many other organs.
Cardiac muscles are the muscles made up of cardiomyocytes and have many sarcomeres, and gap junctions for the coordinated contractions. The muscles are connected by intercalated discs and have rhythmicity. They are found in the heart.
Therefore, cardiac, smooth and skeletal are the types of muscles.
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the cuticle is made of a waxy material. suggest an advantage to a plant of this feature
Answer:
The waxy cuticle stores the moisturizer of leaves by preventing the loss of water.
Explanation:
Answer:
A primary function of the leaf's waxy cuticle is to reduce water loss through the leaves, which is particularly important in arid deserts with little rainfall or Mediterranean climates with seasonal rainfall
White-tailed deer are native to both North and South America. They can be found in many areas of the United States. They can adapt to a wide range of habitats and eat a large variety of plants, including leaves, fruit, bark from sapling trees, flowers, corn, and even poison ivy. All states track the population of deer by various methods. In Ohio the population between 2000 and 2010 can be seen in figure 1. The main predators for deer in Ohio are human hunters and coyotes.
1. Based on the graph what might have happened to the number of deer predators between 2000 and 2004?
a) the number of predators decreased.
b) the number of predators quadrupled.
c) the number of predators increased.
d) the number of predators equalized.
2. What is happening to the deer population between 2005 and 2010?
a) it stays about the same.
b) it plummets
c) it increases exponentially and then stabilizes.
d) it decreases and then stabilizes.
3. During the same period, 2005-2010, what might have also happened to the number of deer hunting licenses.
a) the graph goes up and then down so there are more people hunting deer.
b) the graph is different so there is no change.
c) less people wanted to hunt deer so they didn't have to buy a hunting license.
d) the graph goes down so there are more wolves and ticks.
Answer:
1.c 2.d 3.a
Explanation:
the population of the predators increased
What forms of energy does the sun emits?
All eukaryotic cells have a.
a covering called a membrane that surrounds the cell and controls what information and materials enter and leave it.
b. an internal fluid that gives shape to the cell and supports the other things within it.
c. a central zone or nucleus that contains the cell’s genes.
d. All of the above
Answer:
All eukaryotic cells have a membrane that covers them, internal fluid and a central nucleus, so the correct answer is option d (All of the above).
Explanation:
Eukaryotic cells are those that possess a plasma membrane that surrounds them, acting as a semi-permeable membrane to the passage of substances, in addition to possessing the capacity to receive external signals.
The cytoplasmic membrane of eukaryotic cells is related to an endomembrane system, associated to cytoplasmic organelles and to the central nucleus, which stores genetic information, in the form of DNA.
The eukaryotic cell cytoplasm is fluid and serves as a support for the organelles, as well as all the chemicals suspended in it.
The existence of true nucleus and organelles is what defines a eukaryotic cell and differentiates them from prokaryotic cells.
In general,why do organisms engage in reproduction?
Many organisms – including microbes, plants, and some reptiles – do reproduce asexually. But the vast majority of living things reproducesexually. ... Sexual reproduction allows for greater genetic innovation over time than clonal, improving the chances that an organism can solve the problems at hand.
Why do biologists study bacteria ?
Answer:
Today: Monday, 12 October 2020
Hour: 06.41 WIB (in Indonesia)
__________________________
because bacteria are included in one of the branches of biology, that is microbiology. Biologists learn about the benefits of bacteria in human life as well as the bad effects caused by certain bacteria
DNA and RNA are composed of
O amino acids
O enzymes
O fatty acids
O nucleotides
Answer:
d) nucleotides
Hope it helps you
And pls mark it as the brainiest answer
Jill's class is studying how rocks are formed. Jill's teacher showed them a picture of a type of rock. Then Jill's teacher made a peanut butter and jelly sandwich and explained that one type of rock is formed when layers of sediment are squeezed and cemented together. After the rock is formed, you can still see the layers in the rock. What type of rock was Jill's teacher trying to help them remember by making a peanut butter and jelly sandwich? *
bedrock
igneous rock
metamorphic rock
sedimentary rock
Answer:
sedimentary rock
Explanation:
a sedimentary rock is a layered rock that is formed from compaction, celebration, and recrystallization of sediments.
Answer:sedimentary rock
Explanation:
How do plant cells make the large amounts of ATP they require to survive?
Answer:
Although plants produce NADPH and ATP by photosynthesis, this important process occurs in a specialized organelle, called a chloroplast, which is isolated from the rest of the plant cell by a membrane that is impermeable to both types of activated carrier molecules.
Explanation:
Answer:
thx for points <3
Explanation:
As we have just seen, cells require a constant supply of energy to generate and maintain the ... Food Molecules Are Broken Down in Three Stages to Produce ATP ... Large amounts of acetyl CoA are also produced by the stepwise breakdown and ... Yet animals have only periodic access to food, and plants need to survive ...
All of the following changes would be likely to decrease the rate of transpiration at 8 A.M. EXCEPT:
A-causing the stomata to close
B- Increasing the humidity of the atmosphere
C-Increase the water potential of the atmosphere
D-increasing the water potential of the soil
E-Placing the plant in total darkness
Answer:
D) Increasing the water potential of the soil. I'm an AP Bio student as well and just took this quiz :)
In humans, which cell is produced most directly by mitotic cell division?
Answer:
When a cell divides by way of mitosis, it produces two clones of itself, each with the same number of chromosomes. When a cell divides by way of meiosis, it produces four cells, called gametes. Gametes are more commonly called sperm in males and eggs in females.
Explanation:
emilythompson35464
hope this helps srry if it doesn't tho
In humans, Mitosis organic process produced the cells named daughter cells.
In mitosis, nuclear division in eukaryotic cells occurs when a parent cell divides to provide two identical daughter cells.
There are two ways cellular division can happen in humans-
When a cell divides by way of mitosis, it produces two clones of itself, each with an identical number of chromosomes.
When a cell divides by way of meiosis, it produces four cells, called gametes.
What cells do mitosis the most?
Mitosis occurs whenever more cells are needed. It happens throughout the whole lifespan of a living organism (human, animal, or plant) but most rapidly in periods of growth. This means, in humans, the fastest rate of mitosis happens within the zygote, embryo, and infant stages.
Therefore, mitosis cell division produced daughter cells in humans.
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