Question

which of the following organisms is capable of gaining energy without having to depend on another organism?

• a black bear
• an oak tree
• a mushroom
• a mountain lion

this is a required question
a student is trying to create a model that includes the chromosomes, genes, nucleus, and genetic material. which of the structures listed would include all of the others?

• chromosomes
• nucleus
• genetic material
• genes

Explanation:

For the first question, oak trees are plants which are autotrophs. They can perform photosynthesis to produce their own energy - glucose from sunlight, carbon - dioxide and water, without depending on other organisms. Black bears, mushrooms and mountain lions are heterotrophs that depend on other organisms for energy.
For the second question, genetic material (DNA) is the fundamental substance. Genes are segments of DNA. Chromosomes are made up of DNA and proteins, and they carry genes. The nucleus is a membrane - bound organelle that contains the chromosomes (and thus genes and genetic material). So the nucleus contains all the other structures.

Answer:

1. B. an oak tree
2. B. nucleus