Answer: D
Explanation:
A) - Makes no sense, so no
B) - Experiments in laboratories must be controlled, so no.
C) - A laboratory is a regulated environment, so no.
D) - Only D makes sense, as it is true.
<span>
Autolysis is a process by which a biological cell self-destructs. It is
uncommon in adult organisms and usually occurs in injured cells or
dying tissue. It occurs when a lysosome allows the digestive enzymes out
of its membranes. The cell then, in effect, digests itself. The effect
of autolysis is usually lessened in organelles separated from a cell
using cell fractionation, usually by keeping the organelle in the same
conditions it was in before removal; usually keeping organelles as
'ice-cold isotonic buffers'.
while Apoptosis(pronounced ă-pŏp-tŏ’sĭs, apo tō' sis) is a form of
programmed cell death in multicellular organisms. It is one of the main
types of programmed cell death (PCD) and involves a series of
biochemical events leading to a characteristic cell morphology and
death, in more specific terms, a series of biochemical events that lead
to a variety of morphological changes, including blebbing, changes to
the cell membrane such as loss of membrane asymmetry and attachment,
cell shrinkage, nuclear fragmentation, chromatin condensation, and
chromosomal DNA fragmentation. Processes of disposal of cellular debris
whose results do not damage the organism differentiates apoptosis from
necrosis. </span>
Answer:
Mechanical weathering breaks rocks into smaller pieces without changing their composition. Ice wedging and abrasion are two important processes of mechanical weathering. Chemical weathering breaks down rocks by forming new minerals that are stable at the Earth's surface.
A scientific theory can always be disproved if someone comes along with better evidence which shows another theory is true. However, most other theories are small improvements on existing ones. Evolution and natural selection (the theory that animals' populations change over time because their environment encourages specific different features for individuals that happen with mutation) was an improvement on the existing "theory" that animals were built to be fit for their environments. The earth rotating around the sun was a theory improving on the idea that the sun and the earth move around so that it looks like the sun moves around the earth. All of these happened because there was evidence, so while theories aren't always absolutely true, many modern theories are typically well-tested and if they aren't, they are usually refered to as hypotheses or models (although models can sometimes also be theories, like the Standard Model)
