Anumber of single gene mutants in mice have been discovered that all influence the development of the cerebellum. the weaver mutant shows granule cells in the external granule cell layer instead of in the internal granule cell layer. the external layer is where cell division takes place and the internal layer is where mature granule cell layer. the external layer is where cell division takes place and the internal layer is where mature granule cells are positioned to form neural circuits. which developmental process is compromised by the weaver mutation?
a. cell division
b. cell migration
c. trophic interactions: circuit validation
d. regional patterning
e. none of the above

1. a host loses nutrients to a parasite

2. a parasite only benefits when the host is alive (cause if the host dies the parasite dies with it )

3. producers to consumers

4. the tapeworm is a parasite

5. they convert energy from the sun (photosynthesis)

6. sunflower-robin (i think im 80% sure)

7. producer

8. consumer

9. prey

10. fresh water snails ( cause the green algea is the producer and the snails are the primary consumers and the small fish consumer so is the big fish)

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

1) a

2)c

3)a

4)c

5)b

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