Answer:
The water vascular system of echinoderms functions in locomotion and feeding.
Explanation:
Echinoderms have a unique vascular aquatic system called the ambulacral system.
The ambulacral system refers to a net of fluid-filled channels derived from the coelom with functions related to gas exchange, feeding, stimuli reception, and locomotion. This system acts as a hydro motor apparatus.
The opening to the exterior of this vascular system is through an opening known as madreporite. This structure is united to the circular channel that surrounds the animal´s mouth and from where five radial channels emerge and extend along each arm. Water runs through these structures and makes it possible the gas exchange, feeding, locomotion, and other functions. By hydrostatic pressure, little tubular feet are protruded and retracted and help the animal to move.
Bacteria grow best in foods that are highly acidic true or false
Answer:
I think this is false. Bacteria grow best in an environment that is neutral or slightly acidic.
Developing countries, such as Ethiopia, are areas where there is low technological advancement and poor standard of living. A major issue in these countries is malnutrition, which means they do not have access to enough nutrients for their bodies to perform all their normal functions and can lead to higher death rates. Often individuals in these countries live primarily on a single staple grain such as rice. Children living in these conditions will have similar characteristics such as extremely thin arms and legs.
What key macromolecule might be missing from children in this condition?
Answer: protein
Explanation:
An ecological footprint is the
A. Mark a persons shoe makes in soft earth
B. Number of animals a person has killed
C. Amount of land and ocean area needed to support one person
D. Number of trees people cut down
Answer:
C. Amount of land and ocean area needed to support one person.
Explanation:
The ecological footprint of a person is the amount of land or resources that are required for the maintenance and survival of a person. In simpler terms, it is the level of impact that an individual has in terms of the productive land and resources required for the person to survive.
This ecological footprint allows scientists to check and keep track of the impact of human activities in terms of the land and water used by an individual for his/ her survival. And this date will provide details about any biologically productive land or water areas, giving an estimate of the area needed to provide the renewable resources for the perpetual cycle of nature for the individual.
Thus, the correct answer is option C.
Which is one quality of the entire open-ocean zone?
Answer:
few nutrients and high pressure
Answer:few nutrients a
Explanation:
BRIEFLY justify that- Economic and Social health influences the health of an individual so as to the health of the community.
Answer:
economic health influences health of a person by being able to support said character
Explanation:
Answer:
economic health influences health of a person by being able to support said character
Explanation:
Summarise the differences between the nervous system and the endocrine system on the body’s coordination. Nervous System / Endocrine system How is the signal sent throughout the body? How quickly does the signal travel? What does the signal do to the target cells? How long does the effect of the signal last?
The nervous system signals the endocrine system to release
hormones in response to a stimulus.
The nervous system respond to stimulus through action potentials and neurotransmitters and they signals the endocrine system to secrete hormones.
The endocrine system is responsible for secreting hormones into the blood which is transported to the target cells. These hormones are responsible for metabolism , growth and response to stress. The hormones secreted provide feedback to the brain so as to affect neural processing.
Soil is a combination of tiny rock fragments and decayed plant materials. How do you think soil helps a plant
The _____ was a direct result of the Industrial Revolution.
O improvement in quality of life
O shift to domestic foods over wild foods
O decrease in urban areas
Answer:
Option: Improvement in quality of life
Explanation:
The industrial revolution resulted in a significant improvement in the quality of life for the working class. However, it was slow, irregular, and sometimes missing through many years. The evidence of increasing incomes and improving mortality rates indicate significant improvement took place in the pattern of living of the working class. These factors suggest that the quality of life at least continued firm, and presumably developed. This progress took place with constant warfare with factory owners and government intervention. The Industrial Revolution introduced new machinery, the transformation of cities. The rapid growth of cities and towns beginning to take place with a change in society.
What is the "scale of cells"?
How many neurons are in oxygen Adams
Answer:
8
Explanation:
Answer:
The answer would be 8
Explanation:
This means we have 8 neutrons, 8 protons and 8 electrons.
Which process most likely enabled the formation of the early protists?
Answer:
endosymbiosis.
Explanation:
By the beginning of the 20th century, researchers thought that plastids and mitochondria could come from bacteria. These would have been ingested by primitive cells and live within them in symbiosis.
Answer:
endosymbiosis
Explanation:
helpp.............................
Answer:
The answer is A
Explanation:
It is logical because the balloon lets the student see how much gas is released in the reaction. the balloon inflates with invisible air the student will normally not see.
HELPPPP PLSSSSSSS !!!!
Answer:
Option 1
Explanation:
Protein gives you energy. This option has the most amount of protein and the least amount of calories.
Answer:
option 4
Explanation:
lots of energy but low in calories
the process os sharing results and working together to develop new hypothesis and expirments is known as
Answer:
The process of sharing results and working together to develop new hypotheses and experiments is known as collaboration.
Explanation:
A lichen growing on a rock is an example of
Answer:
...primary succession.
Explanation:
Answer:
Chemical weathering
Explanation:
what is metamorphosis?
Explanation:
A change of the form or nature of a thing or person into a completely different one, by natural or supernatural means.
Are viruses living or non-living? Explain
Which biomolecule forms the cytoskeleton in cells?
A Lipids
B Carbohydrates
С Proteins
D Nucleic Acids
Answer:
microtubules. actin filaments and intermediate filaments
The cytoskeleton is the internal structure that maintains the shape of the cell and is made up of proteins that polymerize into filamentous structures.
What are proteins?They are biomolecules made up of structural units called amino acids.
The cytoskeleton is a protein-based system found in cells that provides internal support and is constructed of three main types of filaments (proteins), these are microtubules, microfilaments, and intermediate filaments.
Therefore, we can conclude that the cytoskeleton is the internal structure that maintains the shape of the cell and is made up of proteins that polymerize into filamentous structures.
Learn more about the cytoskeleton here: https://brainly.com/question/13449140
Which best describes DNA?
A. a molecule that looks like a twisted ladder
B. both answers about DNA are correct
C. a molecule present in all living things
Answer:
The answer is b
Explanation:
the molecule present in all living things
Carrie is conducting an experiment on a solution. The solution's initial pH is 3.2. Then, as Carrie gradually adds Compound X into the solution, the pH increases to 9.8. Which is the most likely identity of Compound X? A. a strong acid, such as hydrochloric acid (HCl) B. a strong base, such as sodium hydroxide (NaOH) C. a salt, such as sodium chloride (NaCl) D. a solvent, such as water (H2O)
Answer:
B
Explanation:
The correct answer would be a strong base, such as sodium hydroxide (NaOH).
The pH of a substance represents the degree of acidity or basicity of the compound. The pH scale ranges from 0 to 14 with 0 being the most acidic, 14 being the most basic, and 7 being a neutral pH. a pH below 7 is acidic and above 7 is basic.
A solution with an initial pH of 3.2 is acidic and in order to raise the pH to 9.8, it will require a strong base. Hence, compound X must be a strong base such as sodium hydroxide.
Correct option: B
Answer:b
Explanation: trust me
What are some reasons why newborn babies “fail to thrive”?
Answer:Down syndrome.
cerebral palsy.
heart disease.
infections.
milk allergy.
cystic fibrosis.
celiac disease.
acid reflux disease.
Explanation:
Answer:
Failure to thrive is slow physical development in a baby or child. It's caused by a baby or child not having enough nutrition.
Explanation:
serious medical problems premature birthlack of enough calories celebral palsySome mammals help maintain their body temperature by sweating when their bodies rise in temperature.
Which property of water is responsible for the ability of sweat, which is mostly water, to help lower body temperature?
Water absorbs heat by breaking hydrogen bonds.
Water changes in density when it changes from a gas to a liquid.
Water’s ability to dissolve solutes, such as salt
Water’s ability to form hydrogen bonds with skin cells
Answer:
Water absorbs heat by breaking hydrogen bonds.
Explanation:
Specific heat is the amount of heat that must be absorbed or lost for 1 gram of that substance to change its temperature by 1 degree. As someone works out, their body releases sweat to keep their body from overheating. Specific heat it mentions that hydrogen bonds between water molecules require heat to form and break, which is what happens when we sweat.
lots of points - pretty simple question - please be specific
Why are the atmosphere, biosphere, lithosphere, and hydrosphere all called “Earth’s life-support system”?
bcs they stops harmful rays of Sun from directly entering earth and also atmosphere for breathing
8. Carbohydrates and lipids share which two of
the following characteristics?
Winding mills are made on hills. Why?
Answer:
Winding mills are made on hills because of air flow and currents.
Explanation:
Winding mills capture wind to turn blades and produce energy. In order to do so, it needs winds! Strong winds, in order to turn the blades. You will notice that if you ever scale a mountain or go higher, it starts to become windier/the wind blows harder.
If the wind mills are placed higher, it can capture these windier conditions, thus moving the wind blades to produce energy. The higher the hill, the stronger the wind current, the more energy it produces.
A membrane which allows all substances to pass through is ________________________ non-permeable c. permeable partially permeable d. impermeable
Answer:
A membrane which allows all the substances to pass through is called permeable membrane.
Explanation:
Hope it will help ^_^
what is sericulture?
Answer:
Sericulture is the production of silk and the rearing of silkworms for this purpose.
Answer:
the production of silk and the rearing of silk worms
Explanation:
not under stand search in google
How does algae reproduce? Select the best answer.
only sexually
both sexually and asexually
only by fission
only asexually
option B both sexually and asexually
Explanation:
Algae regenerate by sexual reproduction, involving male and female gametes (sex cells), by asexual reproduction, or by both ways. Many small algae reproduce asexually by ordinary cell division or by fragmentation, whereas larger algae reproduce by spores. ...
Which substances form a homogeneous
mixture when mixed with water?
salt
vinegar
mud
milk
iron filings
cement
Salt and vinegar only form a homogeneous
mixture when mixed with water.
What cannot be answered by science?
Answer:
Religion
Explanation:
Religion is a belief therefore, you can't conduct an experiment or scientifically prove it exists.