What is made of a single long molecule dna a. allele b. nucleus c. chromosome d. protein

The correct answer is option C, Chromosome

Explanation:

The structure of chromosome consists of DNA forming a tightly coiled structure around associated proteins mainly histone. The DNA looks like thread like structures which are packaged to form chromosome. So the basic structure of all the chromosomes consists of a DNA molecule and a protein. The double stranded DNA loops around the histones twice to form nucleosome which are considered as building block of chromatin packaging

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

the answer for this question would be d. glaciers