Which statement about the geologic time scale
is incorrect?
a. Mammals originated early in the Mesozoic
era.
b. Adaptive radiation of flowering plants,
insects, and birds took place during the
Mesozoic era.
c. Mass extinction of the dinosaurs occurred
about 65 million years ago.
d. Reptiles originated during the Paleozoic
era.
e. Eukaryotes originated during the
Proterozoic eon.
B
You might also like to view...
The occipital lobe of the brain is responsible for
a. coordination of hands and fingers. b. speech. c. memory. d. the senses of taste and smell. e. vision.
Which of the following STDs can be cured?
a. syphilis b. gonorrhea c. chlamydia d. trichomoniasis e. all of these
Menopause is characterized by _____
A) the loss of responsiveness by the ovaries to follicle-stimulating hormone (FSH) and luteinizing hormone (LH) B) a decline in production of the gonadotropin hormones by the anterior pituitary gland C) wearing away of the uterine endometrium D) a halt in the synthesis of gonadotropin-releasing hormone by the brain
Which statement about diffusion is correct?
A) Diffusion causes movement of materials toward equilibrium. B) Diffusion of water cannot occur. C) Diffusion can occur only through a membrane. D) Diffusion requires a protein channel.