In the animal kingdom, only primates menstruate. Other mammalscome into season, or “heat,” during certain times of the year, whilestill others only ovulate after having sex. What would be somepossible advantages of a monthly menstrual cycle?

Q: Explain the physiological mechanism used by the Testes to regulate their temperature demand.

A: Testes are the primary male gonads in man. Each testis is oval in shape, with a length of about…

Q: Each egg cell develops in its own fluidfilled space called a/an _____.

A: Each egg cell develops in its own fluid-filled space called a/an Follicle. The follicle assumes a…

Q: In general of the two events menarche and spermarche, which happens earlier on average? O both…

A: Answer. Puberty is defined as the period during which an individual becomes capable of sexual…

Q: The Menstrual Cycle Place the events in the menstrual cycle in order starting with menstruation. 1 |…

A: Introduction :- Menstrual cycle is defined as the cycle of natural changes that occur in the female…

Q: Parthenogenesis isa. the process by which the germ layers form.b. involved in the formation of the…

A: Reproduction is the process by which living beings produce their own kind.

Q: How does oviposition occurs in female turtles. Provide the pathway involved in the oviposition…

A: Answer :- As we know that Males have a couple of penises that pass sperm from their cloaca to the…

Q: The fusion of a sperm and an egg cell initally produces which of thefollowing?a. blastocyst d.…

A: There are 2 types of cell namely somatic cells and germ cells. Germ cells are aimed to produce…

Q: Identify one way the calendar would have been different (i.e. something either happening or not…

A: When a young woman reaches puberty, she starts to ovulate. This is when a mature egg or ovum is…

Q: In terrestrial arthropods, fertilization is always internal (True/False)?

A: Arthropoda is the largest phylum in the animal kingdom, which includes such familiar forms as…

Q: In humans, implantation in the uterus occurs at whichstage of embryonic development?a. zygoteb.…

A: An embryo is an unborn offspring in the steps of development. It is part of the life cycle. It is…

Q: In a reptile egg, the extraembryonic membrane thatencloses the embryo in a watery environment is…

A: Answer is b.) amnion.

Q: Explain the purpose of the vagina and uterus in thefemale reproductive system.

A: The basic fundamental difference between males and females is the reproductive system and its…

Q: ''In the early cleavage stages, when the embryocannot yet feed, the developmental program is driven…

A: The series of cell divisions that occur in a fertilized egg as it begins t develop into embryo is…

Q: An oocyte lives for only 24 hours after ovulation if it is not fertilized. The trip down the uterine…

A: The Fallopian tube serve as the site for fertilization. Fertilization specifically occur in the…

Q: Approximately 3 days after fertilization , the following structure develops * O blastomere O morula…

A: The development of the human embryo originates by the fusion of egg and sperm(fertilization), which…

Q: If the egg is not fertilized in mammals, the endometrium is shed as

A: Introduction: The inner layer is the endometrium. During a woman's menstrual cycle, hormones cause…

Q: Where does fertilization take place in human body.

A: Humans are the multicellular complex organism and reproduce by sexual mode. This mode of…

Q: Briefly explain the contradictory roles of estrogen in the humanfemale reproductive cycle.

A: The female reproductive system consists of internal and external sex organs. It produces gametes,…

Q: In the female reproduction system The birth canal is also known as the?

A: Humans are sexually reproducing and viviparous organisms. The reproductive stages that happen in…

Q: GnRH can be used to treat some females who want to have childrenbut have not been able to get…

A: The female reproductive system of humans is immature at birth and develops with time. The parts of…

Q: In which type of animalsdoes the placenta exist? Whatis its main function?

A: The placenta is a large organ that develops during pregnancy. It is usually attached to the uterine…

Q: How do the two kinds of mammalian reproductive cycles—estrous and menstrual—differ from each other?

A: The reproductive cycles refers to the change in the physiological changes in the reproductive organs…

Q: In animal gamely he did, a single primary spermatocyte generates blank sperm, while single primary…

A: The meiosis is the cell division process by which a diploid (2n) mother cell divides its nucleus…

Q: Directions: Rearrange the statements based on how a menstrual cycle occurs by writing numbers 1-10…

A: Introduction: Menstrual Cycle : The menstrual cycle is a sequence of natural changes in hormone…

Q: Explain elwhy there is a high level of estrogen and progesterone once in every 28-day uterine cycle…

A: The ovarian cycle governs the preparation of endocrine tissues and release of eggs, while the…

Q: Which of the following is a true statement?(A) All mammals have menstrual cycles.(B) The endometrial…

A: Reproductive system (or genital system) is used for the sexual reproduction. The female attains…

Q: Despite the presence of So many sperms in the vicinity of an egg cell, only one sperm enters the…

A: Fertilization is a process in which male and female gametes fuse to form a zygote. This zygote…

Q: If a fertile woman has sex, when during the menstrual cycle is she most likely to get pregnant? Day…

A: In the female reproductive system, the menstrual cycle is the regular natural change that occurs…

Q: During the evolution of animals , bilateral summetry accompanied cephalization . suggest a reason…

A: Evolution is the process by which an organism inherits or adapts favourable characteristics that…

Q: igment in bottom layer? A. melatonin B. melanin C. mesoderm D. ectoderm

A: Biological pigments are chemical substances that produce color in living organisms, like plant…

Q: Based on what you know about the goal of gastrulation, suggests the direct developmental consequence…

A: Embryonic development is the process of development of an embryo.  Gastrulation is a process that…

Q: days 1 to 5 of the menstru

A: The mensuration cycle is divided in to four phases 1. Mensuration phase 2. Follicular phase 3.…

Q: Regarding mammals, amphibians, and reptiles, explain thoroughly in what way does the inert yolk's…

A: Evolutionary developmental biology is considered a new norm in evolutionary biology. It arose from…

Q: Match the rodent ovulatory cycle phase with the correct hormone combination Proestrus x Peak…

A: The term menstrual cycle is associated with the occurrence of cyclic ovarian activities in mammals.…

Q: Directions: Fill in the concept map of the important events in sequence during the menstrual cycle…

A: Menstrual cycle is a series of natural changes that occur in the female. During this process,…

Q: Where does fertilization normally takes place in a human female.

A: Fertilization is the process of fusion of female gamete (ovum) and male gamete (sperm). Both the…

Q: In general what is thephase of the menstrual cyclewhen copulation may lead tofecundation?

A: Menstrual cycle - Menstrual cycle is a kind of regular changes which occurs in the body of females.…

Q: |(A) Humans have some rather unique features to our reproductive behavior. One strange one, relative…

A:

Q: Parthenogenesis is the most common form of asexualreproduction in animals that at other times…

A: Asexual reproduction is a type of reproduction in which offspring are produced without the fusion of…

Q: If male reproductive pathways are not cyclical, how they are controlled? (SUBJECT: human physiology)

A: Reproduction is a natural process of producing children by the fertilization or fusion of male…

Q: Which sequence details the maturation of an oocyte and the process of ovulation? 1. Graafian…

A: The process of follicle and oocyte maturation occurs simultaneously in the ovary of females. The…

Q: What are gonads? What arethe male and the femalegonads in humans?

A: Reproduction is the biological process by which new individual organisms – offspring, are produced…

Q: A student argues that it is impossible for a woman to become pregnant during the flow phase of her…

A: Menstrual cycle is a cycle that lasts between 21 and 35 days .  The cycle lasts for about 45 years…

Q: Which of the following organisms practice internal fertilization and external development. Chickens,…

A: Introduction :- Internal fertilisation is the joining of an egg and sperm cell inside the female…

Q: Gastrulation occurs to form which three tissues? O hypoblast O ectoderm mesoderm O endoderm O B, C,…

A: During the early stages of embryo development, a multitude of signals are being released, some of…

Q: How does an estrous cycle differ from a menstrual cycle?In what animals are the two types of cycles…

A: Estrous cycle and menstrual cycle are two essential sexual cycles occurring in animals and these…

Q: Events that occur from fertilization to the development of an embryo in animals

A: Answer: Introduction: Embryonic development in animals is also known as embryogenesis, is the growth…