Which of the following is a laboratory method in which embryonic plants are grown from individual meristem cells?
A. Tissue culture propagation
B. Double fertilization
C. Vegetative reproduction
D. Asexual reproduction
E. Alternative germination
Answer: A
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Which of the following statements are correct?
I) Hormones often regulate homeostasis through antagonistic functions. II) Hormones of the same chemical class usually have the same function. III) Hormones are secreted by specialized cells usually located in exocrine glands. IV) Hormones are often regulated through feedback loops. A) only I and II B) only II and III C) only I and III D) only III and IV E) only I and IV
According to the research, which of the following uses of hypnosis is most likely to be successful?
Which of the following is true of ejaculation?
A. Cowper's glands secrete fluid only after ejaculation. B. The ejaculatory duct opens into the seminiferous tubules. C. An average ejaculate contains about 200 million sperms. D. Upon ejaculation, sperms pass from one testis to the other.
Organic chemicals always have a basic framework of the element ________ bonded to other atoms.
Fill in the blank(s) with the appropriate word(s).