NLN Science Practice Questions and
Verified Solutions Updated 2025 Rated
A
*A material that settles out of a reaction is termed a(n) - ANSprecipitate
*A student focuses sunlight to a point with a thin converging (convex) lens.
Which of these direct measurements can the student make as a result of
this experiment? - ANSthe approximate focal length of the lens
*In corn plants, the gene that codes for the presence of chlorophyll is
sometimes missing. The resulting seedlings are albino and will not survive.
This lethal gene appears in corn populations because - ANSthe parent
plants that produced the seeds carried the recessive gene for the albino
trait
*Sugar molecules enter a cell against a concentration gradient by the
process of - ANSactive transport
30 students in a class carefully measure the length and width of 20 peanut
shells. They also count the number and note the size of the peanuts inside.
This information is recorded on various graphs showing the numbers of
nuts and the different sizes. The collected evidence of the peanuts gives
the students an idea of the extent of - ANSvariation within a species
