Answer:
a
Explanation:
2- Clasifica los siguientes sistemas en abierto, cerrado o aislado:
a. una cazata de helado c. una lata de arvejas e. un vaso con jugo
b. una bolsa de 1kg de arroz sin abrir d. un termómetro f. un perro
3- Clasifica los siguientes sistemas en homogéneo y heterogéneo e indica el número de fases:
a. limonada con hielo c. agua y aceite e. agua gasificada
b. agua y acetona d. tierra, arena y piedras f. café con leche
4- En un laboratorio se realiza un experimento para estudiar la flotabilidad de cuerpos
en el agua.
a. Indica qué partes componen el sistema y cuál es el ambiente.
b. Clasifica el sistema como abierto, cerrado o aislado.
c. ¿En qué estado físico está cada componente del sistema?
d. ¿Cuántas fases tiene?
e. ¿Es homogéneo o heterogéneo?
5- El recipiente de la imagen tiene agua coloreada y está tapado.
a. Identifica qué partes componen el sistema.
b. Clasifica el sistema en abierto, cerrado o aislado.
c. ¿El sistema es homogéneo o heterogéneo?
d. Si enfriamos el recipiente hasta obtener hielo,
¿cambiará la masa del sistema? Justifica
6- Se está estudiando la vida de los peces en una pecera que se encuentra encima de una mesa en el laboratorio.
a. Dibuje lo descrito arriba y señale cuál es el sistema, el límite y cuál es el ambiente.
b. Clasifique el sistema según la interacción con el ambiente, justificando su respuesta.
c. ¿Es homogéneo o heterogéneo?
Answer:
Las respuestas se dan a continuación.
Explicación:
1) Una búsqueda de helado y un vaso con jugo es un sistema abierto, un perro es un sistema aislado mientras que una bolsa de 1 kg de arroz sin abrir, un termómetro y una lata de guisantes es un sistema cerrado.
2) la limonada con hielo, el agua carbonatada, el agua en acetona y el café con leche son sistemas homogéneos mientras que el agua y el aceite, la tierra, la arena y las piedras son sistemas heterogéneos.
3) El recipiente de la imagen tiene agua coloreada y está tapado.
B. el sistema está cerrado.
C. El sistema es homogéneo.
D. Si enfriamos el recipiente a hielo, la masa del sistema no cambiará.
4- Se estudia la vida de los peces en una pecera que se encuentra sobre una mesa en el laboratorio.
a. El sistema es abierto y el medio ambiente es acuático.
B. Es un sistema heterogéneo.
Drag the tiles to the correct boxes to complete the pairs. Identify the types of inheritance based on the expression of alleles in the organism. dominant recessive multiple presence of many alleles for the trait to be expressed  presence of two alleles for the trait to be expressed  presence of a single allele for the trait to be expressed 
Answer:
1-Dominent 2-Multiple 3-recescive
Explanation:
but pls try and work it out multiple times bc I got this but u might get differently
diagram represent the generalized animal cell
Answer:
penge like please at pa follow
Refer to the image attached.
will give 15 points and brainliest just awnser like
1.ghkdigh
2.ighdf
3.ygf
and so on thanks!
Answer:
1.Law of conservation of energy
2. Energy transformation
3.Friction
4. electric, thermal
5. Kinetic, Potential
6. Potential, Kinetic
7.Kinetic
8.Radiant, electrical
9. Electrical
10. Radiant
Alice wanted to see if a new premium gasoline would give her more kilometres per litre. She filled her car with the new gasoline and went on a long trip. When she calculated her mileage, she discovered that she has gone 40 kilometres further on this tank of gas than she went on a tank of regular gas when she was driving around town as usual. She decided to buy the premium gas from then on to get better mileage. What are the errors in this experiment?
Answer:
She didn't cover the same distance for the new premium gasoline and regular gas
Explanation:
*PLEASE HELP*
Which of the following best describes the role of the nervous system?
A. responds to all internal and external stimuli
B. detects only stimuli from outside an organism
C. responds only to stimuli occurring inside an organism
D. detects internal and external stimuli at the cellular level
I think it is A! The nervous system reacts to all internal/external, such as hormones, touch, sound, disease, etc
The idea that the brain of an infant is like a blank slate is known as: ____
a- tabula rasa
b-dry cup
c-cogito ergo sum
d-the empty brain
Answer:
a
Explanation:
The idea that the brain of an infant is like a blank slate is known as Tabula rasa. It is given in Locke's philosophy. Thus, the correct option is A.
What is Tabula rasa?Tabula rasa is the theory which describes that individuals are born without a built-in mental content, and therefore all the knowledge comes from experience or perception in life. The epistemological proponents of the tabula rasa disagree with the doctrine of innatism, that holds the fact that the mind is born already in possession of certain knowledge eithout experience.
In Locke's philosophy, tabula rasa was the theory that at birth the infant mind is a blank slate without rules for processing data, and the data is added and rules for processing are formed solely by one's sensory experiences in life.
Therefore, the correct option is A.
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what do we call the flight in bees whereby the go and mate and the drones are killed after mating has occurred?
Answer:
I believe it's called mating flight
Which of the following mechanisms is the correct sequence of events that takes place during the plant responses to internal and external signals?
A) transduction, reception, and response
B) reception and transduction
C) reception, transduction, and response
D) reception and response
Answer:
C) reception, transduction, and response
Explanation:
Plant signaling means that information is conveyed from receptor systems to effectors within and between plant cells.
Signals can be of chemical form or electrical form.
Plant responses to internal and external signals take place in the following sequence:
Reception
Transduction
Response
So, option C) is correct
Name and explain each lymph organ.
Explanation:
What are the organs of the immune system?
Publication Details
Our immune system is made up of both individual cells and proteins as well as entire organs and organ systems. The organs of the immune system include skin and mucous membranes, and the organs of the lymphatic system too.
Organs that function as barriers
Your skin and mucous membranes are the first line of defense against germs entering from outside the body. They act as a physical barrier with support from the following:
Antibacterial substances can kill germs right from the start. A certain enzyme found in saliva, the airways and tear fluid destroys the cell walls of bacteria.
Mucus in the bronchi helps trap many of the germs we breathe in so they can be moved out of the airways by hair-like structures called cilia.
Stomach acid stops most of the germs that enter the body in the food we eat.
Harmless bacteria on our skin and many of the mucous membranes in our body also act as part of the immune system.
In addition, the reflexes that cause us to cough and sneeze help to free our airways of germs.
Illustration: The parts of the immune system
The parts of the immune system
Lymphoid organs
The lymphatic system is composed of:
Primary lymphoid organs: These organs include the bone marrow and the thymus. They create special immune system cells called lymphocytes.
Secondary lymphoid organs: These organs include the lymph nodes, the spleen, the tonsils and certain tissue in various mucous membrane layers in the body (for instance in the bowel). It is in these organs where the cells of the immune system do their actual job of fighting off germs and foreign substances.
Bone marrow
Bone marrow is a sponge-like tissue found inside the bones. That is where most immune system cells are produced and then also multiply. These cells move to other organs and tissues through the blood. At birth, many bones contain red bone marrow, which actively creates immune system cells. Over the course of our life, more and more red bone marrow turns into fatty tissue. In adulthood, only a few of our bones still contain red bone marrow, including the ribs, breastbone and the pelvis.
Thymus
The thymus is located behind the breastbone above the heart. This gland-like organ reaches full maturity only in children, and is then slowly transformed to fatty tissue. Special types of immune system cells called thymus cell lymphocytes (T cells) mature in the thymus. Among other tasks, these cells coordinate the processes of the innate and adaptive immune systems. T cells move through the body and constantly monitor the surfaces of all cells for changes.
Lymph nodes
Lymph nodes are small bean-shaped tissues found along the lymphatic vessels. The lymph nodes act as filters. Various immune system cells trap germs in the lymph nodes and activate the creation of special antibodies in the blood. Swollen or painful lymph nodes are a sign that the immune system is active, for example to fight an infection.
Spleen
The spleen is located in the left upper abdomen, beneath the diaphragm, and is responsible for different kinds of jobs:
It stores various immune system cells. When needed, they move through the blood to other organs. Scavenger cells (phagocytes) in the spleen act as a filter for germs that get into the bloodstream.
It breaks down red blood cells (erythrocytes).
It stores and breaks down platelets (thrombocytes), which are responsible for the clotting of blood, among other things.
There is always a lot of blood flowing through the spleen tissue. At the same time this tissue is very soft. In the event of severe injury, for example in an accident, the spleen may rupture easily. Surgery is then usually necessary because otherwise there is a danger of bleeding to death. If the spleen needs to be removed completely, other immune system organs can carry out its roles.
Look at image please
Answer:
This is easy: 2 Hydrogen and 1 Oxygen!
Explanation:
H20 means 2 H and 1 O
Answer:
Explanation:
Which statement is incorrect about the adult human heart?
Question 28 options:
Blood in the right ventricle is deoxygenated.
Blood in the left ventricle is deoxygenated.
Blood in the pulmonary artery is deoxygenated.
Blood in the pulmonary vein is oxygenated.
Answer not listed
Answer:
B. Blood in the left ventricle is deoxygenated.
Explanation:
Human heart consists of four chambers namely: right atrium, right ventricle, left atrium and left ventricle. These chambers work hand in hand to perform the function of circulating blood throughout the body.
- The RIGHT ATRIUM receives deoxygenated blood from the heart and passes it to the RIGHT VENTRICLE, which pumps it to the lungs in order to be oxygenated.
- The LEFT ATRIUM receives oxygenated blood from the lungs and passes it to the LEFT VENTRICLE, which pumps it into the body.
- Also, the pulmonary artery carries deoxygenated blood into the lungs for oxygenation while the pulmonary veins carry oxygenated blood from the lungs
Based on the above explanation of the right & left atria and the right & left ventricles, it is FALSE that the blood in the left ventricle is deoxygenated. It is rather oxygenated.
substances which are harmful to our environment is called?
Answer:
pollutants or ecologically unfriendly items
plz mark me as brainliest.
Consumers in the reef can be further classified as filter feeders, or organisms that eat plankton by filtering water; grazers, or organisms that feed on organisms that don’t move; and predators, or organisms that eat other animals. List at least one example of each.
Filter Feeders -
Gazers -
Predators -
Answer:
Filter feeders-tubeworms, basket stars, clams,& sponges... there are many more
Grazers- Sea urchins, damselfish, surgeonfish & cobalt algae... and more
Predators- whales, sharks, barracudas, &dolphin... several more
Muliple choices
Hope this helps :)
Question 23 (6 points)
Sea Urchins are aquatic mammals that dive down to catch and eat sea urchins. Sea
urchins hunt the sea floor to catch and eat starfish. Starfish feed off of kelp forests
under the sea.
When sea otters overpopulate they clean out the sea urchins very quickly. This
allows the starfish to overpopulate and eat too much of the kelp forests.
Answer the following questions for 2 points each:
1. Name the TWO organisms that act as Carnivores in the ecosystem described
above.
2. Identify the ecological roles of the other TWO organisms.
3. Identify which of the four organisms above would be considered a keystone
species. Explain why.
Answer: 1. Sea urchins and sea otters
2. They are prey for carnivores.
3. Sea otters, star fish
Explanation:
Sea urchins and sea otters are carnivores as they eat on the flesh of starfish and sea urchins respectively.
Starfish feed on the kelp forests which are the producers in the food chain and the starfish is the primary consumer and prey for sea urchins. So, starfish and kelp forests are the prey in the marine ecosystem.
Keystone species is the one which controls the population of other inferior species in an ecosystem. Here, sea otters consume sea urchins so the population of sea urchins remained in control Starfish controls the population of kelp forest.
Easy question about plant water loss?
Answer:
B,C,F
Explanation:
Please help ;(
question and answer options in photo
zoom in if needed
Thank You :D
Answer:
B Decomposers
Explanation:
There is nothing to eat the dead animals/ leaves for when they die
Answer:
I believe the answer is, B
Energy + 6 CO2
6 H20 → CH2206
602
Photosynthesis
O Cellular Respiration
help ‼️
Answer:
photosynthesis
Explanation:
WILL GIVE BRAINLIEST!!!
The spongy layer____
A.) can't do photosynthesis
B.) is the outermost layer
C.) has no chloroplasts
D.) contains stomata
Answer:
B
Explanation:
is the outermost layer
3 цуулы дфеу игешеы щл гмг фтнцфны еру зукыщт фищму ьу шы сщккусею
Can someone plz help me on this science its due today and STAAR test is next week
Answer:
answer is c
Explanation:
hope it helps!!!
PLEASE HELP ASAP
A population of fish has a carrying capacity of 2,200 fish, with a maximum rate of increase of 1.0 per individual per year. Using the logistic population growth model, what is the approximate population growth rate for a population of 1,580 fish?
259 fish per year
360 fish per year
445 fish per year
863 fish per year
Answer:
258 fish per year asap asap asapAnswer:
its 445
Explanation:
What is meant by obesity?
Answer: The condition of being grossly fat or overweight.
Brainliest please?
Answer:
Obesity is a disease that people have when they have extra body fat.
Explanation:
obesity is not only a physical problem but it is also a medical problem. when you are obese you are prone to have heart problems. The diseases that are caused by obesity can range anywhere from heart disease to certain types of cancers.
Fossil fuels______be reused or replaced.
Answer:
Fossil fuels can't be reused or replaced.
Explanation:
RNA interference is a mechanism of eukaryotic gene regulation. In this mechanism, the enzyme "dicer" cuts dsRNA into smaller fragments called , which form a complex with RISC and degrade specific .
RNA interference is a mechanism of eukaryotic gene regulation. In this mechanism, the enzyme “dicer” cuts dsRNA into smaller fragments called siRNA, which form a complex with RISC and degrade specific RNA.
siRNA or small interfering RNA as a part of RISC complex finds and binds to complementary mRNA and it induces the cleavage of mRNA. This causes degradation of that mRNA. This is the way RNA interference prevents translation.
Answer:
RNA interference is a mechanism of eukaryotic gene regulation. In this mechanism, the enzyme "dicer" cuts dsRNA into smaller fragments called ( small interfering RNA (siRNA) ) which form a complex with RISC and degrade specific ( mRNA)
Explanation:
:)
Into which chamber of the heart does oxygenated blood enter?
which of the following is correct about cells?
Answer:
The answer is the c part that states, in prokaryotes, there are no membrane-bound organelles.
The organelles are surrounded by the single or double membranes such as Lysosomes, mitochondria, nucleus, Golgi Bodies, chloroplasts, Endoplasmic Reticulum and so on.
However, these all are not present in the prokaryotes type of cell.
Explanation:
please mark this answer as brainliest
Are there any foods that have the same effect as anabolic steroids
Answer:
45678
Explanation:69
The human body organ known as the pancreas secretes the hormones insulin and glucagon. These hormones regulate the level
of glucose in the bloodstream. If the level of glucose is too low, the pancreas secretes glucagon which causes the glucose level
to increase; if the glucose level is too high, the hormone insulin will lower the glucose level.
What name is given to this type of regulatory system?
A)
endocytosis
B)
homeostasis
meiosis
D)
symbiosis
All of Earth's biomes considered together represent:
A. population
B. community
C. biosphere
D. ecosystem
All of Earth's biomes considered together represent biosphere.
What is a biome?A biome is an amalgamation of plants and animals with similar traits for their habitat. Biomes can be found in many different locations. They are biological communities that have developed as a result of the area's common physical climate.
What is a biosphere?The biosphere is a small area of the earth's surface where soil, water, and air work together to support life. Only in this region is life possible.
What is a population?A population is a collection of people who can interbreed, share resources, or compete with one another for those resources.
What is a community?A community is defined as a collection of individuals belonging to various species who reside in the same region.
What is an ecosystem?An ecosystem is a biotic and abiotic component-based functioning unit of nature. Air, water, and soil are examples of abiotic components. The biotic components are producers, consumers, and decomposers.
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Leading and lagging DNA strands exist at a replication fork because ___________.A. the DNA polymerase can add new nucleotides onto either the 3' end or the 5' end B. the two strands of DNA are antiparallel, and DNA polymerase can only add new nucleotides onto a 5' end C. the two strands of DNA are parallel and DNA polymerase can only add new nucleotides onto a 3' D. end the two strands of DNA can be either parallel or antiparallel the two strands of DNA are antiparallel, and DNA polymerase can only add new nucleotides onto a 3' end
Answer:
B. the two strands of DNA are antiparallel, and DNA polymerase can only add new nucleotides onto a 5' end
Explanation:
Deoxyribonucleic acid, known as DNA, is the genetic material of a cell, which must first undergo replication i.e produce two identical copies of itself, before a cell can divide. During replication, the double stranded DNA unwinds into a replication fork consisting of two single strands of DNA.
These single strands of DNA are called leading strand (runs from 3'-5') and lagging strand (runs from 5'-3'). These single strands that runs at opposite direction from one another exists at the replication fork because the two strands of DNA are antiparallel i.e. are opposite to one another, and DNA polymerase can only add new nucleotides onto a 5' end.
Leading and lagging DNA strands exist at a replication fork because the two strands of DNA are antiparallel, and DNA polymerase can only add new nucleotides onto a 5 'end.
A replication fork is the juncture between two strands of DNA when it is replicating itself.
In each of them (speaking of the homologous strands) the opposite chain is carried out to have the double genetic information when approaching cell division.
The direction in which the enzymes act is unique from 5 'to 3', this determines the template chain must have the direction 3'→ 5', so that the new chain in formation, complementary and antiparallel, has the direction 5 '→ 3' coinciding with the enzyme's working system.The basic reaction that takes place in replication is a polymerization reaction, in a growing DNA chain a nucleotide is incorporated whose base is complementary to that of the template chain.The DNA polymerases at the two ends of the free nucleotide to be incorporated use its phosphate group or 5 'end to add it to the growing chain.Therefore, we can conclude that leading and lagging DNA strands exist at a replication fork because the two strands of DNA are antiparallel, and DNA polymerase can only add new nucleotides onto a 5 'end.
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