Human chorionic gonadotropin (hCG) is a hormone produced by a fertilized egg and can be detected about six days after conception; it is only found in pregnant women, and can be used to help detect pregnancy.

The other answers are hormones that are present in both pregnant and nonpregnant women, so they cannot be used to determine pregnancy. 

The most likely site of egg (also know as ovum) storage in Lorempis marengis females is the ovaries. This is the correct answer because we are told to assume that Lorempis marengis female reproductive anatomy is identical to that of humans, and in human females, the site of egg storage is the ovaries. 

Females are born with all of the eggs that they will have throughout their lifespan, and they are stored in the ovaries. When females begin menarche, ovulation begins, in which a single egg is released from one of the ovaries every 28-35 days (until menopause) in preparation for fertilization by sperm. The egg is released from the ovary into the fallopian tube, also known as the oviduct, at which time it may be fertilized by sperm. If fertilization successfully occurs, then the fertilized egg, also known as the zygote, travels down the fallopian tube to the uterus, where it may implant and continue to develop, eventually into a fetus. Thus, each of the above answer choices, other than ovaries, is incorrect, as they represent structures within the female reproductive tract that do not store eggs, but rather are sites than an egg may pass through after it is stored and released from the ovary. 

Bartholin's Glands is an incorrect choice, as they are not sites of egg storage, but rather they serve to secrete lubricating mucus to the vagina.

This question requires knowledge of the different cell types in the human male’s reproductive anatomy. The cells of Leydig (also known as the interstitial cells) secrete testosterone and other androgens (male sex hormones), while the Sertoli cells are responsible for nourishing developing sperm. Spermatogonia are sperm cell precursors, and the zona pellucida refers to one of the layers surrounding an ovum.

The scrotum is a bag of skin containing the testes. The importance of the scrotum is to regulate temperature because sperm synthesis in the testes must occur at a few degrees below body temperature. The testes are the location of sperm synthesis, androgen synthesis occurs in the interstitial cells, nourishment of the sperm takes place in the seminal vesicles, and lubrication occurs in the bulbourethral glands.

This question requires knowledge of the ejaculatory path in human males. The quick mnemonic for memorizing the pathway is SEVEn UP (Seminiferous tubule, Epididymus, Vas deferens, Ejaculatory duct, nothing, Urethra, Penis). Additionally, this alerts us to an important characteristic of the MCAT. Oftentimes, answer choices for pathway questions will neither start at the beginning of the pathway nor end at the absolute end of the pathway. Because of this, be sure to know all steps of a pathway, not just the beginning or end.

Sperm cells in the male reproductive tract are first created in the seminiferous tubules of the testes. From there they travel through the epididymis, vas deferens, ejaculatory duct, urethra, and penis. 

During spermatogenesis, one spermatogonia will become 4 separate functioning spermatozoa. In oogenesis, a primary oocyte will become 1 functioning ovum (or egg) while 3 polar bodies are also produced, which are nonfunctioning and never become eggs.

When a female ovulates, the oocyte is in metaphase II, until it becomes fertilized by a sperm. It then completes the second phase of meiosis to make a mature ovum. Remember that, unlike spermatogenesis, oogenesis begins during development. All oocytes undergo meiosis I during fetal development, and are kept suspended in prophase II until ovulation, when they shift to metaphase II. Meiosis only continues beyond metapahse II if fertilization occurs.

Spermatogenesis takes approximately 64 days in adult humans. Males begin producing sperm at puberty, and continue until death.

Oogenisis halts in the female embryo while the oocytes are trapped in meiosis II. At the beginning of the menstrual cycle a number of oocytes in primordial follicles are stimulated by pituitary gonadotropins to continue maturation.