Which of the following hominin lineages is correct?
A. Homo ergaster Homo erectus Homo
sapiens
B. Homo ergaster Homo neanderthalensis
Homo sapiens
C. Homo ergaster Homo habilis Homo
sapiens
D. Homo ergaster Homo heidelbergensis
Homo sapiens
E. Homo ergaster Homo rudolfensis Homo
sapiens
D
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Which of these is a form of assisted reproductive technology in which a sperm cell is injected directly into an egg?
a. FSH b. IVF c. ICSI d. IUD
A single DNA unit that enables the simultaneous regulation of more than one coding region in response to environmental changes is called a(n)
A) promoter. B) operator. C) regulator. D) inducer. E) operon.
Fungal spores produced as a result of sexual reproduction can be called
a. conidiosporeds, zoospores, and basidiospores. b. ascospores, zoospores, and gametangia. c. ascospores, zoospores, and basidiospores. d. conidiospores, basidiospores, and gametangia.
When an organism dies, its muscles remain in a contracted state termed rigor mortis for a brief period of time. Contributing most directly to this phenomenon is
A. the lack of calcium to bind to troponin. B. the absence of an oxygen supply to muscle. C. the inability to synthesize actin and myosin. D. the lack of ATP to break cross-bridges between thick and thin filaments.