#Question id: 7053
#Unit 5. Developmental Biology
The ability of an embryo or larva to react to an environmental input with a change in form, state, movement, or rate of activity (i.e., phenotypic change)
#Question id: 11401
#Unit 9. Diversity of Life Forms
In a hypothetical situation, a bacterium lives on the surface of a leaf, where it obtains nutrition from the leafʹs nonliving, waxy covering, while inhibiting the growth of
other microbes that are plant pathogens. If this bacterium gains access to the inside of a leaf, it causes a fatal disease in the plant. Once the plant dies, the bacterium
and its offspring decompose the plant. What is the correct sequence of ecological roles played by the bacterium in the situation described here? Use only those that
apply.
1. nutrient recycler 2. mutualist 3. commensal 4. parasite 5. primary producer
#Question id: 7099
#Unit 5. Developmental Biology
A fate map of a Xenopus blastula, just before gastrulation begins, shows that the top portion of the embryo will become ectoderm (skin and nerve), the central portion will become mesoderm (bone, muscle, and blood), and the lowest portion will become endoderm (gut). How is it that the endoderm and mesoderm, shown on the outside in the fate map, end up on the inside in the embryo after gastrulation?
#Question id: 19840
#Unit 13. Methods in Biology
Match the following source of thermostable DNA polymerase with proofreading (3’−5’ exonuclease) activity;
DNA Polymerase |
Sources |
A- Tma |
i) Pyrococcus furiosus |
B- Deep VentTM |
ii) Pyrococcus
woesi |
C- Tli |
iii) Thermotoga maritima |
D- Pfu |
iv) Pyrococcus
sp. |
E- Pwo |
v) Thermococcus litoralis |
#Question id: 5765
#Unit 8. Inheritance Biology
How many different trisomics could be formed in a plant with a diploid number of 12?