Which of the following is NOT true regarding spermatogenesis? Initial spermatozoa formed are not mobile and cannot fertilize. Spematogonia have diplold chromosome. Spematocyte undergoes two rounds of division to produce 4 diploid sperm Some of the spermatogonia become reservoir cells Spematogonia breaks away from the basement membrane to develop Into sperm.

In a femal human, the oogonium forms when the female is a _______________. This happens _________________. At puberty some of the primary oocytes continue meiosis. Each menstrual cycle a few will continue development. They will only go to __________________. of meiosis and stop unless fertilization occurs.

Select ALL of the following that occur during spermiogenesis: Microtubules form a flagellum The nucleus condenses O Proteolytic (digestive) enzymes are bundled in an acrosomal cap Excess cytoplasm is shed

Which of the following is NOT true while comparing internal to external fertilization. In external fertilization, zygotic DNA replication starts after the fusion of gamete pronuclei; in internal fertilization, the first zygotic DNA synthesis happens before pronuclei fusion. B Capacitation is only observed in internal fertilization. In both internal and external fertilization, the cortical granule reaction is required for the slow block to polyspermy. In external fertilization, intracellular calcium release is stimulated prior to gametes fusion; in internal fertilization, it happens after gametes fusion. In both internal and external fertilization, there is a slow and a fast block to polyspermy.

Meiosis in spermatogonia begins After the first ejaculation At puberty During early child hood  At birth In the embryo

Which plane would be helpful when viewing the heart and the right kidney at the same time?  whychose that plane and why the remaining planes would not be helpful when viewing these specific organs at the same time.  Enzymes are important during the process of fertilization. What would be the anticipated consequences if the level of acrosin was low or non-existent in the acrosome? What is the name of the outer cell layer of the blastocyst and what does it give rise to? Does this layer contribute to the development of the embryo?

Which of the follwing structures is not made up of several cells? Seminiferous Tubule Follicle O Mitotic Spindle Anther

Vertebrate Fertilized Class Blastula or Blastocyst Late Morula Gastrula Egg Embryo Amphibian Reptile Mammal How long after ovulation does it take an embryo to develop? The resulting embryo may become the (attached) in the lining of After eight weeks of development the embryo is called the How long does it takes the fetus to develop and grow inside the mother? What is differentiation? The embryo continues dividing and form all the tissues organs and organ systems of the animal When should pregnant mother take most precaution?

In sea urchin, which step of egg and sperm recognition involves the formation of a fertilization cone?   Sperm binding to the egg's vitelline membrane   Fusion of the sperm and egg membranes   Acrosomal reaction   Chemo-attraction   Sperm binding to the egg's jelly coat

In Ascaris, meiosis and oocyte maturation occur at the same time. Describe the stages that oocytes go through as they pass from the ovaries to the uterus in these worms.