Both Lamarck and Darwin made pivotal observations regarding traits related to inheritance in their studies. While each theorized different origins for these traits, they agreed that over time, individuals obtain characteristics referred to as inheritance. Lamarck proposed that traits are inherited from parents to their offspring, whereas Darwin believed they arise from the process of natural selection.
Answer:A, B, C
Explanation:
A. The arrangement of phospholipids occurs in bilayers with the polar head groups facing both the extracellular and cytoplasmic sides, while the hydrophobic core remains in the center.
The plasma membrane also consists of membrane proteins.
B. Certain integral proteins function as transmembrane proteins that traverse the membrane and create a hydrophilic channel, specifically selective for certain solutes like enzymes, antigens, and hormones.
Peripheral proteins are located on the surface of the bilayer and act as signaling proteins.
C. Membrane lipid bilayers are not rigid or fixed. They exhibit free lateral movement of their components, thus the membrane is fluid in nature. This fluidity facilitates processes like endocytosis and exocytosis.
Answer:

Explanation:
The pH formula is given by
![pH = -[log H+]\\](https://tex.z-dn.net/?f=pH%20%3D%20-%5Blog%20H%2B%5D%5C%5C)
It's also stated that each pH unit indicates a tenfold change in hydrogen ion concentration.
For lemon juice with a pH of 2, the hydrogen ion concentration is

While for pure water, which has a pH of
, the concentration is

Thus, the concentration of H+ ions in lemon juice is
times greater than in pure water.
Response:
B. Microorganisms have the capability to generate distinct proteins that are beneficial for genetic investigations
Rationale:
Biodiversity encompasses the variety of living organisms present on our planet. It is a crucial aspect of ecosystems since these organisms are interconnected. Hence, a decline in biodiversity will have repercussions for the ecosystem.
When considering biodiversity, a typical person often thinks only of visible organisms, but diversity also exists among microscopic entities.
Human activities are threatening not just larger creatures but also the tiny organisms. Microbes are essential to our existence; for instance, they are utilized by researchers in the fields of genetics and molecular biology. They also produce proteins that are ingested by humans.
Therefore, Option-B is the accurate choice.