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Anisogamy is a form of sexual reproduction that involves the union or fusion of two gametes that differ in size and/or form. The smaller gamete is male, a sperm cell, whereas the larger gamete is female, typically an egg cell. Anisogamy is predominant among multicellular organisms. [1] In both plants and animals, gamete size difference is the ...
The reproductive system of marine gastropods such as those from class Opisthobranchia and order Archaeogastropoda from the class Prosobranchia, is a continuous cycle of alternating male and female reproductive role prevalence. Immediately after spawning in late summer, the predominance of the female reproductive functions are terminated and ...
External fertilization. External fertilization is a mode of reproduction in which a male organism's sperm fertilizes a female organism's egg outside of the female's body. [1] It is contrasted with internal fertilization, in which sperm are introduced via insemination and then combine with an egg inside the body of a female organism. [2]
Human reproduction is sexual reproduction that results in human fertilization to produce a human offspring. It typically involves sexual intercourse between a sexually mature human male and female. [1] During sexual intercourse, the interaction between the male and female reproductive systems results in fertilization of the ovum by the sperm to ...
External genitalia of an adult female (left) and male (right). The human reproductive system includes the male reproductive system, which functions to produce and deposit sperm, and the female reproductive system, which functions to produce egg cells and to protect and nourish the fetus until birth. Humans have a high level of sexual ...
Consider the following: Check "caps lock" or "num lock" keys - These keys change the value of what you're actually typing. Try another web browser - If you can access your account in another browser, the problem isn't with your account; you'll need to fix the issue in your preferred browser. Someone changed your password - An unauthorized party ...
If you are in any doubt, don’t feed it. Let’s take a look at some of the foods you should not offer your hamster. 32 things hamsters shouldn’t eat. 1. Chocolate. Chocolate bars. Hamsters ...
Stratified reproduction is a widely used [1] social scientific concept, created by Shellee Colen, that describes imbalances in the ability of people of different races, ethnicities, nationalities, classes, and genders to reproduce and nurture their children. [2] Researchers use the concept to describe the "power relations by which some ...