You're examining fossils from a variety of hominin species. Which fossils would show the greatest amount of radioactive material in relation to daughter products?
A) Paranthropus aethiopicus
B) Homo habilis
C) Ardepithecus ramidus
D) Australopithecus garhi
B
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Matching II. Choose the one most appropriate
answer for each. 1. ___ acrosome 2. ___ cervix 3. ___ clitoris 4. ___ endometrium 5. ___ epididymis 6. ___ FSH 7. ___ Leydig cells 8. ___ LH 9. ___ placenta 10. ___ oxytocin 11. ___ seminal vesicles 12. ___ vas deferens A. acts to trigger ovulation in females B. structures that secrete mucus and nutrients absorbable by sperm; open into the ejaculatory duct C. two of these connect seminiferous tubules with vasa deferentia D. opening between uterus and vagina E. organ that supplies the embryo/fetus with nutrients and removes wastes F. connects epididymis with ejaculatory duct G. hormones that stimulate uterine contractions in the female H. cap over the head of a sperm; contains lytic enzymes to penetrate egg membranes I. testosterone produced here J. sensitive to sexual stimulation; develops from same embryonic tissues as does the penis in males K. the uterine lining L. acts on gonad to help mature gametes; released from anterior lobe of pituitary
The plasma membrane is a thin sheet of lipid embedded with
A. sodium and potassium ions. B. carbohydrates. C. nucleotides. D. polymers. E. proteins.
For the successful development of a vaccine to be used against a pathogen, it is necessary that _____
A) the surface antigens of the pathogen stay the same B) all of the surface antigens on the pathogen be identified C) the pathogen has only one epitope D) the major histocompatability (MHC) molecules are heterozygous
What conditions are responsible for the stimulation of the JGA (juxtaglomerular apparatus)?
a. an increase in blood pressure or blood volume within the heart b. an increase in the solute concentration of the blood plasma c. a decrease in the solute concentration of the blood plasma d. a decrease in the blood pressure or blood volume in the afferent arteriole e. consumption of alcohol