Answer:
An ecosystem is an open system in terms of energy, and an open system in terms of matter.
Explanation:
An ecosystem is an open system in terms of energy, and an open system in terms of matter. The correct option is A.
What is an ecosystem?An ecosystem is a geographical area in which plants, animals, and other organisms, as well as weather and landscape, coexist to form a life bubble.
An ecosystem is an open system in terms of both energy and matter.
Thus, A is the correct answer.
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The missing options of the question are:
A) open; openB) closed; openC) closed; closedD) open; closedE) open; partially closed
How can scientists determine when these ancient animals lived?
which nervous system transmits only excitatory signals to effector cells?
Answer:
Explanation:
Sensory afferent neurons convey information from tissues and organs into the central nervous system. Efferent neurons transmit signals from the central nervous system to the effector cells and are sometimes called motor neurons. Interneurons connect neurons within specific regions of the central nervous system.
5. As blood glucose levels increase, hormones are
released to return glucose levels to normal. This
is an example of
(1) a nervous system disorder
(2) the synthesis of antibodies
(3) a stimulus and a response
(4) an antigen and antibody reaction
Answer: i think it an antigen and antibody reaction or a stimulus and a response
As blood glucose levels increase, hormones are released to return glucose levels to normal. This is an example of an antigen and antibody reaction.
What is the hormone that causes the blood sugar level to return to normal?When blood sugar levels drop, glucagon instructs the liver to convert the glycogen back to glucose, causing blood sugar levels to return to normal. Insulin also supports healing after an injury by delivering amino acids to the muscles.
What happens when glucose levels return to normal?After people eat, blood sugar concentrations increase. The pancreas releases insulin automatically to move glucose from the blood to the cells. As more and more cells receive glucose, blood sugar levels return to normal. The liver and muscles store excess glucose as glycogen.
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which organism moves with tube feet controlled by a water vascular system?
Answer:
echinoderms
Explanation:
3. A food contains five grams of carbohydrates. How many calories does that food get from carbohydrates?
A 45 calories
B 5 calories
C 20 calories
D 4 calories
Answer:
The answer is C.
Explanation:
carbohydrate = 5 grams
carbohydrates provide 4 calories per gram.
4 * 5 = 20
20 calories
during which phase of mitosis does the nuclear envelope reform and chromosomes decondense?
Answer:
telophase as mitosis ends
1. normally, sodium and potassium leakage channels differ because ___________________.
Answer:
sodium ions diffuse through leakage channels into the cell, but potassium ions diffuse through leakage channels out of the cell
Explanation:
What adaptations allowed vascular plants to thrive in terrestrial environments that cannot be colonized by bryophytes
Answer:
Stomata, tracheids, a waxy cuticle
Explanation:
The adaptations that allowed vascular plants to thrive in terrestrial environments that cannot be colonized by bryophytes is the presence of stomata, tracheids and a waxy cuticle. Therefore, the correct option is D.
What are the adaptations of vascular plants?Vascular plants have several adaptations that allow them to thrive in terrestrial environments that bryophytes, such as mosses and liverworts, cannot colonize. These adaptations include stomata, tracheids, and a waxy cuticle.
Stomata are small pores on the surface of leaves that allow for gas exchange, which is essential for photosynthesis. Tracheids are specialized cells that make up the xylem, a tissue that transports water and nutrients throughout the plant. A waxy cuticle is a layer of waterproof material that covers the surface of leaves and stems, preventing excessive water loss and protecting the plant from damage.Together, these adaptations allow vascular plants to thrive in a wide range of terrestrial environments, from arid deserts to humid rainforests. Therefore, the correct option is D.
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The question is incomplete, but most probably the complete question is,
What adaptations allowed vascular plants to thrive in terrestrial environments that cannot be colonized by bryophytes:
A. stomata,
B. tracheids,
C. a waxy cuticle
D. All of the above.
what structure in the eye creates a visual blind spot?
what gas is released by plants during photosynthesis
Answer:
oxygen po
Explanation:
pa brainliest pls
Within a plant leaf, most photosynthesis occurs in cells called ______ cells, which are often interspersed with air spaces to maximize gas exchange.
Answer:
The spongy mesophyll is the kind of cell described.
Explanation:
"Most of the interior of the leaf between the upper and lower layers of epidermis is a parenchyma(ground tissue) or chlorenchyma tissue called the mesophyll (Greek for "middle leaf"). This assimilation tissue is the primary location of photosynthesis in the plant."
The main layers of the leaf are the cuticle, which is the "skin," the palisade mesophyll (the second topmost layer of cells), the spongy mesophyll, which is lower, and the lower cuticle. The spongy mesophyll is so called because it consists of leaf cells interspersed with air, which maximises their access to oxygen.
if a cell contains 12 chromosomes at the end of meiosis i, how many chromosomes will the daugher cells contain at the end of meiosis ii
HELP PLEASE ILL GIVE YOU BRAINLEST
A skydiver jumps out of an airplane at 10,000 feet above ground (Position A). Then continues falling until he opens his parachutes and lands safely on the ground.
Question:
A. Given the positions above (Position A and Position B), at which position does the skydiver have the higher potential energy? Explain. (1 point)
B. Given the position above (Position A and Position B), at which position does the skydiver have the higher kinetic energy? Explain. (1 point)
Answer:
Question:
A. Given the positions above (Position A and Position B), at which position does the skydiver have the higher potential energy? Position A, potential energy is stored energy that depends upon the relative position of various parts of a system.
Given the position above (Position A and Position B), at which position does the skydiver have the higher kinetic energy? Position B, Kinetic energy is a form of energy that an object or a particle has by reason of its motion.
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What does weight measure?
A. the force of gravity
B. an object's mass
C. an object's velocity
D.an object's density
Answer:
the Force of gravity
Explanation:
im not fully sure but i personally think it would make sense
A
For example, your mass is the same on different planets but your weight would be different because there may be more or less gravitational pull
I hope this helped :)
The role of an enzyme in a chemical reaction is to change which of the following
The function of an enzyme is to speed up chemical reactions. They do this by lowering the activation energy, which is the minimum energy that must be available for a chemical reaction to occur. ... Thus the correct answer is an enzyme changes "the activation energy of the reaction."
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circular dna not part of a bacterial genome is called a __.
Answer:
a plasmid
Explanation:
I think it's called a plasmid but I'm not sure. hope it helps
Circular dna not part of a bacterial genome is called a plasmid.
What is plasmid?
A plasmid is a small piece of extrachromosomal DNA that is contained within a cell. It is distinct from the DNA of the chromosomes and has the ability to multiply without help from the chromosomes. Plasmids are most frequently found in bacteria, where they take the form of small, circular, double-stranded DNA molecules. However, archaea and eukaryotic cells can also occasionally contain plasmids.
Plasmids are naturally found in the cells of bacteria, and they can also be found in the cells of some eukaryotic organisms. Plasmids are often responsible for conferring genetic benefits on bacteria, such as resistance to antibiotics, because the genes they carry.
Therefore,circular dna not part of a bacterial genome is called a plasmid.
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Cancer is a disease that involves uncontrolled cell division caused by a genetic mutation. It can occur in almost any region in the body. So, cancer is essentially uncontrolled
of
.
Answer:
Mitosis of specialized cells
Explanation:
Answer:
Mitosis of specialized cells
Explanation:
12. When you rub the skin of a shark from head to tail, it feels very smooth, but when you rub it
towards the head, it is rough like sandpaper. This is because the scales that make up its skin
point towards the tail to reduce friction. This would be an adaptation for
a. Feeding & Digestion
b. Locomotion
C. Buoyancy Regulation
d. Circulation & Gas Exchange
Answer:
b. Locomotion
Explanation:
Reduction of friction helps faster movement.
The lower the friction, the faster the shark can move.
Which term refers to the diamond-shaped area between the thighs that is bordered by the pubic symphysis, the coccyx, and the ischial tuberosities
Answer:
The diamond-shaped region of a female's external genitalia found between the anterior ends of the labial folds, the anus posteriorly, and the ischial tuberosities laterally is called the perineum
In the ___________, antibiotic paper disks are added to a solid medium inoculated with a standard amount of a pure bacterial culture to test whether the organism is sensitive, intermediate, or resistant to the drug.
Answer:
Kirby-Bauer Test
Explanation:
What are the 5 functions of the cell membrane?
Answer:
no idea
Explanation:
I hope he having a great day tho
Answer:
Terms in this set (5)
1):-protects the cell by acting as a barrier.
2):-regulates the transport of substances in and out of the cell.
3);-receives chemical messengers from other cell.
4):-acts as a receptor.
5):-cell mobility, secretions, and absorptions of substances.
prior to the work of mendel, inheritance was viewed as resulting from ______
Prior to the work of Mendel, inheritance was viewed as resulting from the BLENDING of phenotypic traits within fixed, unchanging species. Mendel discovered how traits are inherited across generations.
Mendel was a scientist who experimented on pea hybrids and now he is known as the father of modern genetics.
The Mendel principles include:
The Law of Segregation posits that phenotypic inherited traits can be controlled by two 'factors' (i.e., alleles), which separate (i.e., segregate) and pass into germinal gametic cells.The Law of Independent Assortment posits that these factors do not depend upon each other, but instead, alleles are independently sorted into germinal (gametes) cells.Learn more in:
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State one importance of photosynthesis
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:
An ecosystem consists of
O energy.
O the soil, water, and weather.
O a community of organisms.
o all of these are components of an ecosystem.
Answer:
all of these are components
What is the difference between osmosis and osmotic pressure?
Answer:
Osmosis is the flow of a solvent into a solution through a semipermeable membrane. Osmotic pressure is the pressure that stops the process of osmosis. Osmotic pressure is a colligative property of a substance since it depends on the concentration of the solute and not its chemical nature.
Which of these are freshwater ecosystems? (select all that apply)
rivers and streams
lakes and ponds
coral reefs
ocean
Answer:
ocean, lakes and ponds, and rivers and streams
Answer:
lakes and ponds
rivers and streams
Explanation:
coral reefs and the ocean are salt water ecosystems
The spleena. filters damaged red blood cells from the blood.b. changes undifferentiated lymphocytes into competent lymphocytes.c. is necessary for life. It can't be removed without causing death.d. produces several different hormones with unknown function.e. has additional digestive functions.
Answer:
filters damaged red blood cells from the blood.
Explanation:
The zipper-like complex that forms in meiosis occurs during __________ and is called the __________.
A blood stain that impacts a surface at a low angle will have a ________ tail than one that impacts at a higher angle.
Smaug is angered early in the chapter when
Question 1 options:
the dwarves enter his tunnel
he discovers some treasure missing
he is woken from his sleep
Answer:
he discovers some treasure missing
Explanation:
