#Question id: 1330
#Unit 4. Cell Communication and Cell Signaling
Which of the following are mineralized biological structures/mateials? Please select all that apply.
a) Glycosaminoglycans
b) Bone
c) Pectins
d) Diatom cell walls
#Question id: 12102
#Unit 10. Ecological Principles
Use the following diagram of Joseph Connell's study of barnacle distribution in Scotland to answer the following two questions
Which of the following is the most logical conclusion about the distribution of the two species of barnacle, Chthamalus and Balanus?
#Question id: 11855
#General Aptitude
#Question id: 5661
#Unit 5. Developmental Biology
Following statements regarding to the embryogenesis in A. thaliana.
A. The first zygotic division is unequal, with the basal cell larger than the apical cell. The basal cell divides to give rise to the suspensor. The apical cell divides vertically to form a two-celled proembryo, which will give rise to the rest of the embryo.
B. The top most suspensor cell is recruited into the embryo, where it is known as the hypophysis, and contributes to the embryonic root meristem and root cap.
C. The next two divisions produce an eight-cell octant-stage embryo, which develops into a heart-stage embryo of around 32 cells
D. The embryo elongates and the cotyledons start to develop as wing-like structures at one end, while an embryonic root forms at the other. This stage is known as the globular stage.
Which of the following statements are correct?
#Question id: 5526
#Unit 5. Developmental Biology
The allantois