Explanation

• The signaling pathway followed by T-lymphocytes in response to antigenic stimulation is: Autocrine signaling.
• In autocrine signaling, cells respond to substances that they themselves release. T-lymphocytes often produce and respond to their own cytokines during an immune response, which is a key aspect of autocrine signaling.

Explanation

• Partial fraction decomposition is a technique used to express a combined fraction (a rational function) as a sum of simpler fractions, called partial fractions.
• This is done by breaking down the original fraction into its component parts, each with a simpler denominator.

Explanation

• Epoxy paints are commonly used to coat industrial equipment, including thermal power station components, due to their excellent adhesion, corrosion resistance, and durability. 
• Epoxy paints form a strong, chemical-resistant film that protects the underlying metal from corrosion and wear.

Explanation

• Heuristics refer to mental shortcuts or rules of thumb that help individuals make judgments, solve problems, and make decisions efficiently and effectively.
• Heuristics are often based on experience, intuition, and common sense, and are used to simplify complex problems and arrive at a solution that is "good enough" or satisfactory.

Explanation

• Folic acid is the most essential nutrient for a woman during her initial stages of pregnancy to prevent birth defects.
• It plays a crucial role in preventing neural tube defects in the developing fetus.

Explanation

The SERIALIZABLE isolation level is the strictest transaction isolation level provided by SQL Server. It ensures that transactions are executed in a serialized manner, as if they were the only transaction operating on the database. This means that:

• No other transactions can modify data being read by a transaction.
• No other transactions can insert new data that would affect the results of a transaction.
• No other transactions can delete data that a transaction is using.

Explanation

Isotopes are atoms of the same element that have the same number of protons (atomic number) but a different number of neutrons. This means they have:

• Same chemical properties (because they have the same number of protons, which determines chemical behavior)
• Different mass numbers (because they have a different number of neutrons)
• Different physical properties (such as different atomic masses, different radioactivity, etc.)

Explanation

• The correct sentence would be: "The other girls ostracized her because of the way she dressed."
• Ostracized means to exclude or reject someone from a group or society, often as a form of punishment or disapproval.

Explanation

• Dry ice is the solid form of carbon dioxide (CO2), and it is an example of a molecular crystal.
• In a molecular crystal, the molecules are held together by weak intermolecular forces such as van der Waals forces or hydrogen bonds, rather than by strong chemical bonds.

Explanation

Perinatal transmission refers to the transmission of a pathogen (such as a bacterium, virus, or parasite) from a mother to her infant during the perinatal period, which is the time period around birth, specifically:

• During pregnancy (in utero)
• During delivery (through contact with infected birth fluids or tissues)
• In the first few weeks after birth (through close contact or breastfeeding)