2025 While asexual reproduction is common among many plants and invertebrates, parthenogenesis, in which an egg develops, is more rare in vertebrates. Greta Cross, USA TODAY, 31 Jan. 2025 See all Example Sentences for reproduction Word History First Known Use circa 1640, in the meaning defined...
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Dystocia (from the Greek “dys” meaning difficult or abnormal and “tokos” meaning birth) is defined as a painful, slow, or difficult delivery. It is not always easy to differentiate normal parturition from dystocia, especially in the queen, where prolonged time between the births of kittens...
Androgens (from the Greek word andro, meaning male) are synthetic or natural chemicals, typically steroids, in charge of the development and maintenance of male characteristics via interaction with androgen receptor (AR). The interaction between androgens and AR controls the activation of primary male...
1 First recorded in 18455–60 Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024 Scientific definitions for asexual reproduction asexual reproduction [ā-sĕk′shōō-əl] The American Heritage® Science Dictionary Copyright © 2011. Published ...
In sexual reproduction, an egg and a sperm combine to make a new individual. From Science News For Students The clearest evidences as to the stages in the evolution of sexual reproduction is found in the plant world among the green algæ. From Project Gutenberg Thus I have endeavored to ...
The term is contrasted with in vivo, meaning "in a living organism," or in utero, "in the uterus." During in vitro fertilization, eggs are removed surgically from a female's reproductive tract. They then can be fertilized in a test tube or petri dish by sperm taken from the woman's ...
Have you ever done something without meaning to? Not like doing something on accident - but rather, automatically reacting to a situation without making the choice to. This is the result of instinct. All living things have instincts, which are natural patterns of behavior. For example, when a...
Meaning of Repeatability and Reproducibility Repeatability and reproducibility are closely related but distinct concepts in scientific research. Repeatabilityrefers to the ability to replicate a specific experiment or study under the same conditions and obtain consistent results. In other words, if the exper...
Perhaps it is because reproduction involves more than just health; it touches on emotions, relationships, identity, and meaning. People who feel uneasy about third-party reproduction may alsofearlosing control over the creation of life, as technology seems to place power in the hands of ...