What is the process of embryo sac (胚囊) development?
What is the process of embryo sac (胚囊) development?
The Apomixis of plants are A: Adventitious embryo B: Parthenogenesis C: Patrogenesis D: Diploid gametophyte
The Apomixis of plants are A: Adventitious embryo B: Parthenogenesis C: Patrogenesis D: Diploid gametophyte
Embryonic stem cells (ES cells) are pluripotent stem cells derived from the outer cell mass of a blastocyst, an early-stage pre-implantation embryo._
Embryonic stem cells (ES cells) are pluripotent stem cells derived from the outer cell mass of a blastocyst, an early-stage pre-implantation embryo._
Which of the followings can develope into the embryo?() A: The inner cell mass B: The zona pellucida C: The trophoblast D: The blastocyst cavity E: The morula
Which of the followings can develope into the embryo?() A: The inner cell mass B: The zona pellucida C: The trophoblast D: The blastocyst cavity E: The morula
The ethical issues of embryonic stem cell technology include A: the question of whether the embryo is "human" B: the question of What is the "human" C: the question of whether embryonic stem cells capacity of totipotency D: ethical and legal issues on whether destroying embryos is "killing"
The ethical issues of embryonic stem cell technology include A: the question of whether the embryo is "human" B: the question of What is the "human" C: the question of whether embryonic stem cells capacity of totipotency D: ethical and legal issues on whether destroying embryos is "killing"
根据接种外植体不同，植物组织培养包含下列类型： A: 植株培养(plantlet culture) B: 胚胎培养(embryo culture ) C: 器官培养(organ culture) D: 组织或愈伤组织培养(tissue culture or callus culture)
根据接种外植体不同，植物组织培养包含下列类型： A: 植株培养(plantlet culture) B: 胚胎培养(embryo culture ) C: 器官培养(organ culture) D: 组织或愈伤组织培养(tissue culture or callus culture)
The ethical issues of embryonic stem cell technology include A: the question of whether the embryo is "human" B: the question of What is the "human" C: the question of whether embryonic stem cells capacity of totipotency D: ethical and legal issues on whether destroying embryos is "killing"
The ethical issues of embryonic stem cell technology include A: the question of whether the embryo is "human" B: the question of What is the "human" C: the question of whether embryonic stem cells capacity of totipotency D: ethical and legal issues on whether destroying embryos is "killing"
阅读理解2. What is the author's opinion presented in Paragraph 2? A: Being natural is inherently good. B: We should stop using antibiotics to kill bacteria. C: We cannot say embryo modification is bad because it is unnatural. D: Millions of human die young because of natural diseases.
阅读理解2. What is the author's opinion presented in Paragraph 2? A: Being natural is inherently good. B: We should stop using antibiotics to kill bacteria. C: We cannot say embryo modification is bad because it is unnatural. D: Millions of human die young because of natural diseases.