Your botany teacher is making assignments for a research project on a plant species. She assigns you to study hemlock (Conium maculatum) and mentions that is an r-selected species. Based on this, what characteristics would you predict to be true of hemlock? Check all that apply.
_____ HABITAT: Disturbed areas like the edges of agricultural fields.
_____ HABITAT: Pristine, undisturbed meadows.
_____ REPRODUCTION: Large numbers of seeds produced at a time.
_____ REPRODUCTION: Small numbers of large seeds produced.
_____ LIFESPAN: One to two years.
_____ LIFESPAN: Several decades.
__X__ HABITAT: Disturbed areas like the edges of agricultural fields.
_____ HABITAT: Pristine, undisturbed meadows.
__X__ REPRODUCTION: Large numbers of seeds produced at a time.
_____ REPRODUCTION: Small numbers of large seeds produced.
__X__ LIFESPAN: One to two years.
_____ LIFESPAN: Several decades.
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In mosses, the zygote grows and develops into a sporophyte while remaining attached to and nourished by its ____
a. sperm-producing sporophyte parent b. sperm-producing gametophyte parent c. egg-producing sporophyte parent d. egg-producing gametophyte parent e. own photosynthetic leaf-like parts
Which structure is found only in animal cells?
a. mitochondrion b. chromosome c. centriole d. nucleus
Which one of the following choices is true of tRNA?
A. Each tRNA binds a specific amino acid. B. tRNAs are extremely small molecules. C. There are four types of tRNA. D. tRNAs carry special sequences known as codons.
Answer the following questions true (T) or false (F)
1. Restriction enzymes occur naturally in bacteria. 2. It is not possible for a human gene to work in any other organism. 3. A human clone would be as much like the person from whom it was cloned as "identical" twins are like each other.