Why is producer important in an ecosystems?
Are chloroplasts found in animal cells ?
Answer: No
Explanation:
Chloroplasts are the food producers of the cell. The organelles are only found in plant cells and some protists such as algae. Animal cells do not have chloroplasts. Chloroplasts work to convert light energy of the Sun into sugars that can be used by cells.
Jhich best describe the role of small intestine in digestion?
A. It temporarily stores the food
B. Secrets bile to help in digestion.
C. Helps in the absorption of nutrients from food.
D. It carries food from the mouth to the stomach.
The best option that describes the role of the small intestine in digestion is (C) it helps in the absorption of nutrients from food.
What is small intestine?The small intestine is a vital part of the digestive system, and its main role is to facilitate the absorption of nutrients from the food we eat. After food is partially digested in the stomach, it enters the small intestine, where it is broken down further by enzymes secreted by the pancreas and bile from the liver.
The walls of the small intestine are lined with small finger-like projections called villi, which greatly increase the surface area available for nutrient absorption.
As food passes through the small intestine, nutrients such as carbohydrates, proteins, and fats are absorbed through the villi and into the bloodstream, where they can be transported to the cells throughout the body to be used as energy or for other purposes.
In addition to nutrient absorption, the small intestine also plays a role in the digestion of carbohydrates and proteins, and it helps to regulate the release of digestive enzymes and hormones.
Overall, the small intestine is a crucial component of the digestive system, and its proper functioning is essential for maintaining good health and well-being.
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Online Content: Site 1
Explain the effects of air pollution on several European countries. (Site 1)
Answer:
Air pollution harms human health and the environment. In Europe, emissions of many air pollutants have decreased substantially over the past decades, resulting in improved air quality across the region. However, air pollutant concentrations are still too high, and air quality problems persist. A significant proportion of Europe’s population live in areas, especially cities, where exceedances of air quality standards occur: ozone, nitrogen dioxide and particulate matter (PM) pollution pose serious health risks. Several countries have exceeded one or more of their 2010 emission limits for four important air pollutants. Reducing air pollution therefore remains important.
Air pollution is a local, pan-European and hemispheric issue. Air pollutants released in one country may be transported in the atmosphere, contributing to or resulting in poor air quality elsewhere.
Particulate matter, nitrogen dioxide and ground-level ozone, are now generally recognised as the three pollutants that most significantly affect human health. Long-term and peak exposures to these pollutants range in severity of impact, from impairing the respiratory system to premature death. Around 90 % of city dwellers in Europe are exposed to pollutants at concentrations higher than the air quality levels deemed harmful to health. For example, fine particulate matter (PM2.5) in air has been estimated to reduce life expectancy in the EU by more than eight months. Benzo(a)pyrene is a carcinogenic pollutant of increasing concern, with concentrations being above the threshold set to protect human health in several urban areas, especially in central and eastern Europe.
"Air pollution is causing damage to human health and ecosystems. Large parts of the population do not live in a healthy environment, according to current standards. To get on to a sustainable path, Europe will have to be ambitious and go beyond current legislation."
Explanation:
Identify how Newton's third law of motion was responsible for the astronaut's return to the space station.
Answer:
sorry i cant understand clearly
Explanation:
i hope its help more
Answer: The equipment will "push back" on the astronaut with the same amount of force.
Explanation: Newton's third law of motion can be summed up as "For every action, there is an equal and opposite reaction." This means that when the astronaut applies force to push the object, that object will apply an equal amount of force to the astronaut.
List the levels of organization of that makeup an organism, starting with an atom and ending with an organism.
Atom, molecule, organelle, cell, tissue, organ, organ system, organism
The levels of organization that makeup an organism are the degrees of increase in complexity of structures, from the atomic level to more complex ones. In this sense, the levels of organization of an organism are:
1. Atom
2. Molecule
3. Macromolecules
4. Cells
5. Tissue
6. Organs
7. System of organs or apparatus
8. Organism
The atom is the smallest fundamental unit of matter, it is made up of subatomic particles: protons, electrons, and neutrons.
Different combinations of similar or different atoms form molecules.
Macromolecules are large molecules, generally formed by polymerization of smaller units called monomers.
The cell is the essential structure for life, which is made up of different combinations of molecules.
Tissues are structures made up of combinations of cells.
Organs are a collection of tissues in a structure with a common function.
Organ systems is the system where organs are related to fulfill a systemic function.
An organism is an individual multicellular living being that has an independent existence, made up of a variety of systems.
Therefore, we can conclude the levels of organization of that makeup an organism are atoms, molecules, Macromolecules, cells, tissues, organs, organ systems and ending with an organism.
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Marc and Dan are twins who like the same activities, and foods. At a recent doctor's appointment, Dan was told that he has type 2 diabetes. He has been feeling good and has not noticed any changes in his health. He does not understand why he has diabetes but this brother does not and why he has not had any noticeable symptoms. How would you explain this to him? Describe what the glycemic index is and how this is very important in developing a nutritional diet.
Answer:
The glycemic index allows people with diabetes to follow a balanced diet by consuming foods with a low glycemic index, which helps to avoid increasing the level of sugar in the blood.
Explanation:
The glycemic index is important to know when a certain food raises the level of sugar in the blood.
A good diet for people with diabetes is determined by foods that have a low glycemic index between 1 to 55; Some of the foods that can help us regulate the level of sugar in the blood are the following:
- Breads and cereals that are exclusively whole grains.
-Legumes like beans and lentils.
-Fruits such as: peach, pear, apples, cherries and prunes.
Is the following statement true or false?
Environmental pressures cannot lead to adaptations
over time, only mutations can
O True
O False
Two groups of students were tested to compare their speed working math problems. Each group was given the same problems. One group used calculators and the other group computed without calculators. Which group is the control group? Experimental group?
if you founded cells what would you name them
Answer:
i dont knowwwwwwwwwww llooooooooool
Explanation:
Answer: hanime.com
Explanation:
Use the drop-down menus to classify each worm into the appropriate group.
planarians
marine worms
leeches
pinworms
tapeworms
Answer:Planarians = flatworms
Marine worms = segmented worms
Pinworms = roundworms
Tapeworms = flatworms
Explanation:
I’m Built Different
Answer:
leeches are segmented
Explanation:
What do organisms need both processes
will mark brainliest
Make a claim about the relationship between the following terms: DNA, gene, protein, life functions. Be sure to use evidence and explain your reasoning. *
2 Central dogma of life. Notes: Genes are DNA sequences instruct cells to produce particular proteins, which in turn determine traits. Chromosomes are strings of genes. Mutations are changes in gene's DNA sequence.
Some trees shed their leaves in time for winter, called deciduous trees. How is this adaptation useful?
The trees save energy during the darker, colder months.
The trees blend into their environment and hide.
The trees attract animals to spread their seeds.
The trees take in more sunlight through their branches.
Answer:
they save energy in darker colder months
Match each movement with the correct label.
flexion
extension
adduction
abduction
elevation
depression
medial rotation
lateral rotation
Answer:
flexion - depression
extension - elevation
adduction - medial rotation
abduction - lateral rotation
Explanation:
Flexion is the process of bending an arm or leg. It occurs as a result of the contraction of the muscles. Depression is a downward movement. Hence, flexion refers to the depression of an arm or leg.
Extension is the process of stretching the body parts. Elevation is an upward movement. Hence, extension refers to the elevation of body parts.
Adduction is the movement of a limb or other part of the body towards the midline or another part of the body. The movement of the limb towards the midline of the body is known as medial rotation.
Abduction is the movement of a limb or other part of the body away from the midline of the body. The movement of the limb away from the midline of the body is known as lateral rotation.
What are the abiotic and biotic factors of a Beach Coastal?
Answer:
Beaches have specific abiotic factors like sandy, rocky soil, high amounts of sunlight, strong wind, high salinity and changing tides. Despite these challenges many biotic factors survive, such as mangrove trees in tropical areas, and flat, sprawling succulents in sand dunes.
PLEASE HELP!!! Asapp
Answer:
B
Explanation:
Its the same
A scientist classified 10 organisms into the same phylum based on their similarities. She further grouped 4 of these organisms together based on the
characteristics they shared. In to which level of classification did the scientist classify the 4 organisms?
a. family
b. genus
c. class
d. order
Guys pls help me!!!!!!
Answer
A
Explanation:
that is the cell membrane it is used specifically for that reason, to help good things get it and to keep bad things out
What plate is the North American plate eventually going to collide with
how does density-independent limiting factors
can affect populations
Answer:
Density independent limiting factors also cause population sizes to increase. For example, the water from a flash flood increases the growth of vegetation, thereby providing more food for primary consumers in the ecosystem.
What is a reason WHY energy is lost in food chains? A Organisms are part of many different food chains. B Energy moves from level to level. C Animals do not use all the energy from the plants. D The bottom levels have more energy than the top levels.
Answer:
A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another. ... Food webs consist of many interconnected food chains and are more realistic representation of consumption relationships in ecosystems.
Explanation:
Describe how DNA and RNA direct cell differentiation. Give an example of how environmental factors may influence cell differentiation.
Answer:
1- DNA: a specific DNA sequence encodes a transcription factor which activates the expression of target genes involved in cell differentiation
2- RNA: short non-coding RNAs may bind to enhancer regions and thus activate the expression of target genes involved in cell differentiation
3- Environmental factor: temperature may control the expression of genes involved in cell differentiation pathways
Explanation:
The deoxyribonucleic acid (DNA) contains the genetic material required to encode proteins. Some of these proteins are transcription factors involved in the activation of diverse signaling pathways, including, for example, cell differentiation and proliferation. On the other hand, microRNAs (miRNAs) are short non-coding RNAs that have the ability not only to repress but also to activate transcription by binding enhancer sequences. The miRNA activation mechanism has recently been discovered. In consequence, some miRNAs may potentially activate the expression of target genes involved in cell differentiation (e.g., c-myc gene). Finally, environmental factors (e.g., nutrient availability, salinity, temperature, etc.) may also activate gene expression and thus control diverse pathways such as cell differentiation, cell proliferation and cell death (apoptosis).
Eyepiece magnification(EM) X Objective magnification (OM)= Overall Magnification:
Answer:
I. Overall magnification (TM) = x40
II. Overall magnification (TM) = x100
III. Overall magnification (TM) = x400
IV. Overall magnification (TM) = x1000
Explanation:
A microscope can be defined as an optical device that is typically used to make an enlarged (magnified) image of a minute (small) object and as such reveals all the little information about the object that cannot be seen by the natural human eye.
Mathematically, the overall (total) magnification of a microscope is given by the formula;
Overall magnification (TM) = Eyepiece magnification(EM) X Objective magnification (OM).
I. When EM = x10 and OM = x4
TM = EM * OM
TM = x10 * x4
TM = x40
II. When EM = x10 and OM = x10
TM = EM * OM
TM = x10 * x10
TM = x100
III. When EM = x10 and OM = x40
TM = EM * OM
TM = x10 * x40
TM = x400
IV. When EM = x10 and OM = x100
TM = EM * OM
TM = x10 * x100
TM = x1000
please help me!!! its for hw
Answer:
100% white cows if i understand what theyre asking for
Explanation:
Enter the correct 4 digit code (no spaces)
please help need the answer before 2/24/21
what is an eclipse ? please explain
Answer:
An eclipse is an astronomical event that occurs when an astronomical object or spacecraft is temporarily obscured, by passing into the shadow of another body or by having another body pass between it and the viewer. This alignment of three celestial objects is known as a syzygy
Explanation:
Answer:
An eclipse is an astronomical event that occurs when an astronomical object or spacecraft is temporarily obcured.
Using a Punnett Square give all of the possible genotypes and phenotypes of the offspring resulting from the following cross: A male that is not color blind and a female that is heterozygous and not color blind.
Color blindness is a sex-linked trait and only occurs on the X chromosome.
Use “B” for normal eyes and “b” for colorblind.
What will determine whether or not mutations will be passed to offspring?
PLS HELP ME THANKS :) write a short paragraph evaluating the different methods of seed dispersal.
Explanation:
There are five main modes of seed dispersal: gravity, wind, ballistic, water, and by animals. Some plants are serotinous and only disperse their seeds in response to an environmental stimulus. Because plants cannot walk around and take their seeds to other places, they have developed other methods to disperse (move) their seeds. Dandelion seeds float away in the wind