Yes:
At the bottom of every food chain are producers. They make up the backbone of life on earth. Without organisms that take energy from the sun and convert it to usable energy, where would all the other organisms, like us, get our energy? While many times it is indirect, all organisms, in part, rely on the sun for energy and in turn, for life.
Answer:
D.Each chromosome consists of a single long DNA molecule, and each gene on the chromosome is a particular segment of that DNA.
Explanation:
A closed DNA molecule contains two strands of linear nucleotide sequences, and both DNA strands contain genes. These genes are DNA sequences that may be transcribed in messenger RNAs (mRNAs).
The cell nucleus contains chromosomes in which the double-stranded DNA molecules are packaged by specialized proteins (histones). Moreover, there are organelles (mitochondria and chloroplast) that also contain genes which are transcribed in an analog mode to genes contained in the nuclear chromosomes.
Answer:
Option A is the correct answer.
Explanation:
Winds carry air pollutions across oceans and continents.
Answer: Option C) C. They are composed of misshapen proteins
Explanation:
Prions are infectious agents that contain protein but no nucleic acids (DNA or RNA). Prions have been implicated in the causative agent in several diseases such as:
- Mad cow's disease
- Creutzfeldt-Jakob disease etc