Identify three ways in which the evolution of photosynthetic autotrophs affected either the atmosphere or other
organisms. What will be an ideal response?
1. Photosynthetic organisms changed the atmosphere from an anaerobic to aerobic
atmosphere.
2. Oxygen in the atmosphere created an environment for evolution of aerobic organisms
which were capable of producing more energy for organisms’ growth and development .
3. Oxygen in the atmosphere poisoned obligate anaerobes.
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Which of the following directors of embryonic development can be found within unfertilized eggs?
A) tissue-specific proteins B) bindin proteins C) cytoplasmic determinants D) mRNAs transcribed from embryonic genome
In general, repressor proteins that act to inhibit eukaryotic gene expression:
A. interfere with communication between Pol II and DNA-binding transactivators. B. block Pol II-mediated polymerization of ribonucleotides. C. bind to the C-terminal domain of Pol II. D. disrupt HMG protein-DNA interactions.
________ separates proteins based on their attraction to a specific molecule attached to the surface of the matrix (or beads) of a chromatography column
Fill in the blank with correct word.
What is the main role of human chorionic gonadotropin?
A. It is similar to FSH in stimulating follicle development. B. It stimulates the release of oxytocin from the mother's pituitary. C. It maintains the corpus luteum. D. It allows the mother to realize she is pregnant, via pregnancy tests.