#Question id: 1601
#SCPH05 I Biotechnology
Cytotoxin T cells express
#Question id: 6960
#SCPH01 Biochemistry
At the blastocyst stage during mammalian embryonic development, the specification of trophectoderm requires ________; whereas in inner cell mass _________activation is essential.
#Question id: 4563
#SCPH06 I Botany
If ʺxʺ indicates the location of fossils of two closely related species, then fossils of their most-recent common ancestor are most likely to occur in which stratum?
#Question id: 1420
#SCPH06 I Botany
Examination of a cell’s structure reveals condensed chromatin, a shrunken cytoplasm, but unfragmented DNA and a lack of blebbing. If this cell has been triggered to undergo apoptosis by an extrinsic factor, which of the following events has NOT likely happened yet?
#Question id: 11404
#SCPH06 I Botany
You were discovered 4 species in forest, their characteristic as following,
A specie eat only bamboo;
B species eat fruits of many tree species;
C species Short life span;
D species low population variability .
Which of the following species characteristics have been proposed as more prone to extinct?