What is the function of sporangia

Antigens are molecules proficient in motivating an immune response. Each antigen has different surface features, or epitopes, causing in specific responses. Antibodies (immunoglobins) are Y-shaped proteins produced by B cells of the immune system in reply to contact with antigens.

Answer: Hot springs

Explanation: The kingdom Archaea consists of bacterial species which can survive very harsh conditions. These are the oldest organisms present on Earth. These bacterial species can be found in areas where other organisms can't exist. The extreme conditions where they can be found are- high salt content, hot water springs, in the ice at north pole, etc.

Answer:

IT IS NOT YOGURT IT IS HOT SPRINGS I DID THE 5.06 AND GOT 99 CAN YOU BELIEVE IT.

Explanation:

Answer:

D

Explanation:

Answer:

The correct answer is option c-to survive colder seasonal temperatures.

Explanation:

Broad leafed trees shed their leaves in autumn or winter season which is experienced with colder temperature.

These leaves are called deciduous leaves and shed their leaves because these leaves lack wax coating and anti-freeze chemicals due to which the fluid which flows through veins can be freeze by cold temperature so, plants to save the energy get rid of them.

Thus, option c-to survive colder seasonal temperatures is the correct answer.

The answer is; 3

A lunar cycle is the phases of the moon as it orbits, once, around the earth (which takes approximately 29.5 days). These phases can be viewed from the earth - new moon to full moon. The light from the sun that hits the moon reflects to the earth. Depending on the position of the moon,  in its orbit, and with respect to a person at a particular position of the earth, the moon will be in a particular phase.  

The morphology of cells in tissue viewed under a microscope can indicate whether it is simple or complex tissue. Loose connective tissue is recognized by cells scattered in a transparent background, while vascular tissues are identified by cells such as xylem and phloem. For small surface structures, electron microscopes are best, but light microscopes, commonly used by students, often require staining to view cell components.

When viewing a specimen under a microscope to determine the type of tissue it is, several characteristics can be noted. For example, if the morphology of the cells observed is similar and they appear uniform, the tissue is likely simple tissue. In contrast, complex tissue would exhibit a variety of cell types and structures. Specifically, if under the microscope, the tissue specimen shows cells located in spaces scattered in a transparent background, this is indicative of loose connective tissue.

In the context of plant biology, if a student reported vascular tissue while inspecting a cross-section of a plant stem, the presence of cells such as xylem, with thickened cell walls, and phloem would be indicative of this type of tissue. Cork cells, as viewed by Robert Hooke, come from the bark of the cork oak tree, and these cells create a protective and insulating material that is also impermeable to liquids and gases. For viewing very small surface structures of a cell, a scanning electron microscope (SEM) or a transmission electron microscope (TEM) would be most suitable due to their high resolution.

Light microscopes are commonly used by students and are advantageous for viewing living organisms. However, due to cells generally being transparent, details may not be distinguishable without the use of special stains, which unfortunately often result in the death of the cells.

Answer:

Explanation:

Over time, steep hills are weathered. Weathering and erosion break down and remove rocks and soil such that the mountains tops become more rounded and the rocks and soil deposit on the hillsides, making them less steep.

After another 9 million year of erosion and deposition, an observer could expect the mountains to be less steep and more rounded.

Answer:k

Cognición y el cerebro

Aprendizaje y memoria

Margaret Semrud-Clikeman, PhD, LP, ABPdN, Facultad de Medicina de la Universidad de Minnesota

El cerebro comienza a madurar incluso antes del nacimiento. Aunque continúa madurando a lo largo de la mayor parte de la vida, el cerebro no madura al mismo ritmo en cada individuo.

Esto no debería sorprender. Después de todo, nuestros cuerpos crecen a diferentes ritmos: llegamos a la pubertad a diferentes edades y a nuestra madurez emocional en diferentes momentos también.

Explanation:

Viruses are accelular entities and do not possess cellular membranes in their structure. Thus, option A is correct.

Virus are considered as a potent pathogenic organism for carrying infection in the body of the host. Viruses have the unique properties which demarks them from living and non-living creatures.

Virus can be considered non-living in the outer environment however they possess the property of life once they enter into the body of the host. Viruses have the ability to multiply in the body of the host by utilizing host DNA and proteins as machinery for replication.

Virus can have RNA or DNA as their genetic material and they can efficiently pass through the bacterial filters because of their small size.

Virus can cause severe infections in man, plants as well as in cattle. Common cold, HIV AIDS, hepatitis are some examples of virus in human.

Thus, virus can be considered as an infectious agents.

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Answer:

sickle cell

Explanation:

Answer:

Sickle cell anemia

Explanation:

Hemoglobin serves to carry oxygen and is present in red blood cells. Sickle cell anemia is caused by a point mutation in one of the hemoglobin gene that codes for its beta chain. The mutated allele of the beta globin chain encodes the abnormal hemoglobin molecules which stick to one another resulting in sickle shaped red blood cells.

Answer:D

Explanation:Hope this helps

Final answer:

Lactose binds to the repressor, allowing transcription of the enzyme lactase. The lac operon system regulates gene expression efficiently, promoting the production of enzymes for lactose digestion only when lactose is present and thereby saving cellular energy. So the correct option is D.

Explanation:

When an abundance of lactose is present in a bacterial cell, the correct response is D. Lactose will bind to the repressor, allowing the gene coding for the enzyme lactase to be transcribed. In the lac operon system, the presence of lactose triggers the conversion of some lactose into allolactose, which then binds to the lac repressor. This interaction inhibits the repressor's activity, preventing it from binding to the operator region of the operon. With the repressor not bound, RNA polymerase can freely initiate the transcription of the lac operon genes, leading to the expression of enzymes that enable the digestion and utilization of lactose.

Essentially, the lac operon functions as an efficient regulatory system that ensures gene expression occurs only when necessary. In the absence of lactose, the lac repressor binds to the operator region, acting as a 'road-block' to RNA polymerase and preventing transcription of the lac genes. The system optimizes energy use within the cell by expressing genes only when their products are needed, which in this case, are enzymes for lactose digestion.

sorry I'm like 3 years late lol but

Answer:

Spica appears to be blue because of how hot the star actually is that is why Spica is blue

The nervous system directly governs organs. The brain collects information from various organs and sends messages to keep them healthy. The skeletal system helps us move when our muscles contract.

Organ system communication is key to teamwork. They must respond to each other and vary their responses to maintain physical equilibrium. Autonomic nerve system and endocrine system control organ communication.

ANS controls involuntary functions. The ANS controls heart rate, blood flow, and digestion. You don't need to tell your heart to beat faster or squeeze muscles to digest meals. These functions aren't even worth considering. The autonomic nervous system controls them. Neurotransmitters deliver messages between nervous system sections and to other organ systems.

Endocrine glands secrete hormones into the bloodstream. Hormones in the blood circulate to all bodily cells. Hypothalamus controls the endocrine system. Hypothalamus hormones travel directly to pituitary gland cells. Pituitary is endocrine system's master gland. Its hormones activate or deactivate other endocrine glands. The pituitary gland secretes thyroid stimulating hormone, which stimulates the thyroid gland to secrete thyroid hormone. Thyroid hormone stimulates metabolism in bodily cells.

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Answer:

C. changes caused by harmful pathogens

Explanation:

Scientific Theory change but not thrown away because scientist continue looking for possibilities and exact proportion to prove such theory, though it is change because they always conducted hypnosis in every theory and once it proves something different they conduct another hypothesis for more actual evidence.

Answer:

THE ANSWER IS B

Explanation:

An astronomical object or the celestial object refers to a naturally taking place physical entity, composition, or association, which prevails in the observable universe. Or it can also be illustrated as the celestial body refers to any natural body external to the atmosphere of the Earth. The examples, are the Sun, Moon, and the planets of the solar system.

In the mentioned objects, the lowest in the hierarchy is the planet, then comes the star, then the solar system, and finally the galaxy.

Answer:

The answer should be Chloride.

Explanation:

Answer:

Binary Fission

I hope this helps

Within the mitochondrion’s inner membrane

The right answer is C. Within the mitochondria’s inner membrane.

The mitochondrion is limited by two membranes of very different properties:

* the outer membrane contains a transmembrane protein, porin, which allows the passage of ions and water-soluble metabolites of molar mass <10.000 Da.

* The inner membrane is very rich in proteins and almost impermeable to ions and water-soluble metabolites.

The respiratory chain or electron transport chain is located in the inner membrane of mitochondria. Each mitochondrion contains thousands of copies of the electron transport chain.

Ans.

Sludge can be defined as the semi-solid waste produced by sewage treatment of municipal and industrial wastewater as a byproduct. Sludge dumping involves discharge if sludge into the ocean.

It contains various contaminating agents, such as pathogens, heavy metals, chemicals, such as pesticides, and other hazardous substances. 'Sludge dumping is a threat to humans and marine life as it can cause various diseases, pollute beaches, and kill marine organisms.'

The active site of an enzyme is a uniquely shaped region that binds specifically to its substrate, either through a rigid lock-and-key model or a more flexible induced fit model, enabling the enzyme to catalyze a specific reaction.

The active site of an enzyme relates to its substrate through a specific physical and chemical complementarity, which enables the enzyme to catalyze a reaction involving the substrate. Two models explain this relationship: the lock-and-key model and the induced fit model. In the lock-and-key model, the substrate fits into the active site perfectly without any alterations to the enzyme's shape, much like a key fits into a lock. In contrast, the induced fit model allows for some flexibility; the active site undergoes a conformational change to snugly fit the substrate, accommodating a small group of similar substrates, thus facilitating the reaction.

Once the substrate is bound to the active site, the enzyme catalyzes the conversion of the substrate into the product(s) of the reaction. This specific interaction and catalysis are critical for the biological functions that enzymes serve, from digestion to DNA replication.

Prokaryotes are single-celled organisms without a nucleus. The kingdom Monera is relatively small. Bacteria come in different shapes - cocci, bacilli, and spirilla.

Prokaryotes are single-celled microorganisms lacking a true cell nucleus and membrane-bound organelles like mitochondria and the endoplasmic reticulum. They include two major domains: Bacteria and Archaea. Prokaryotes are characterized by their simplicity, with genetic material (DNA) located in a nucleoid region. They play vital roles in various ecosystems, participating in nutrient cycling and serving as decomposers. Some prokaryotes can be pathogenic, causing diseases in humans and other organisms. The correct fill-in-the-blanks are -

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Answer:

the most likely answer is C

Explanation: