viviparous

简明释义

英[vɪˈvɪpərəs]美[vɪˈvɪpərəs]

adj. [脊椎] 胎生的；在母体上发芽的

英英释义

单词用法

同义词

反义词

例句

1.The fruits or persistent pericarps of breeding seedlings during the viviparous developing were rich in the salt and this may do favorable to adaptation of seedlings to highly saline environment.

种苗胎生的孕育环境宿存果皮是一个盐分累积提高的高盐环境，这有利于种苗在胎生过程中对盐分的抗性锻炼。

2.The fruits or persistent pericarps of breeding seedlings during the viviparous developing were rich in the salt and this may do favorable to adaptation of seedlings to highly saline environment.

种苗胎生的孕育环境宿存果皮是一个盐分累积提高的高盐环境，这有利于种苗在胎生过程中对盐分的抗性锻炼。

3.The traits showed when the viviparous plantlets abscise and disperse that the dispersing behavior for the viviparous plantlets is adaptable to the special environment.

胎生苗在脱落与散布时表现出的特点说明：胎生苗的扩散行为是与其特殊的环境条件相适应的。

4.Before the formation of leaves, the nutrition for the development of viviparous plantlet is supplied by its parent, which is a kind of typical foraging behavior.

在胎生苗叶片产生以前，它的营养全部由母体提供，属于全异养阶段，这是一种典型的觅源行为；

5.Ichthyosaurs and other contemporary viviparous species, by contrast, gave birth to multiple offspring.

相比之下，鱼龙和其他现代胎生的物种产下多个幼崽。

6.Male wears new quilt and female covers bucket. Then the first viviparous is not a big girl.

男披新被女盖斗，头一胎生的不是大丫头。

7.Does now consider? True strong. The ability of somebody else mama one viviparous 3.

现在想一想？真强。人家妈能一胎生三个。

8.The whale is viviparous, the baby to eat mother's milk to grow up.

鲸是胎生的，幼鲸靠吃母鲸的奶长大。

9.Man and most other mammals are viviparous.

人和其他大多数哺乳动物都是胎生的。

10.Many mammals are viviparous, meaning they give birth to live young rather than laying eggs.

许多哺乳动物是胎生的，这意味着它们生下的是活的幼崽，而不是产卵。

11.The viviparous nature of certain reptiles allows them to adapt to various environments.

某些爬行动物的胎生特性使它们能够适应各种环境。

12.In contrast to oviparous species, viviparous organisms maintain their embryos within their bodies.

与卵生物种相比，胎生的生物在体内维持其胚胎。

13.Some fish, like guppies, are also viviparous, giving birth to fully formed fry.

一些鱼类，如孔雀鱼，也是胎生的，会生下完全形成的小鱼。

14.The viviparous reproduction strategy provides certain advantages in survival and development.

这种胎生的繁殖策略在生存和发育上提供了某些优势。

作文

In the vast realm of biology, organisms exhibit a variety of reproductive strategies, each adapted to their environments and lifestyles. One fascinating category of reproduction is that of being viviparous, which refers to animals that give birth to live young rather than laying eggs. This method of reproduction is observed in several species, including most mammals, some reptiles, and a few fish. Understanding viviparous organisms sheds light on the evolutionary advantages they possess, as well as the ecological implications of their reproductive strategies. The term viviparous originates from Latin roots; 'vivus' meaning 'alive' and 'parere' meaning 'to bring forth'. This definition perfectly encapsulates the essence of viviparous reproduction, where the developing embryo is nourished directly by the mother, typically through a placenta. This form of reproduction contrasts with oviparous organisms, which lay eggs that develop outside the mother's body. The transition from egg-laying to live birth represents a significant evolutionary shift that has allowed viviparous species to thrive in various environments. One of the primary advantages of being viviparous is the increased survival rate of offspring. In many cases, the embryos are protected within the mother's body, which shields them from environmental hazards and predation. Additionally, the direct nourishment provided by the mother allows for more efficient growth and development. For example, in mammals, the placenta facilitates the exchange of nutrients and waste products between the mother and the fetus, ensuring that the young are born at a more advanced stage of development compared to hatchlings of oviparous species. Moreover, viviparous reproduction can also be advantageous in unstable environments. When conditions are harsh, such as during droughts or food shortages, a mother can delay the birth of her young until conditions improve. This adaptability can be crucial for the survival of both the mother and her offspring, allowing them to emerge when resources are more abundant. However, being viviparous also comes with its challenges. The energy expenditure required to carry and nourish developing young can be substantial. Mothers must invest significant resources into gestation, which can limit the number of offspring they can produce in their lifetime. This trade-off often leads to viviparous species having fewer offspring compared to their oviparous counterparts, who can produce large clutches of eggs with relatively lower investment per individual. Additionally, the care of live young often necessitates a higher level of parental investment. Many viviparous species exhibit nurturing behaviors, providing protection and teaching survival skills to their young. This social structure can strengthen bonds within species and enhance the survival rates of the next generation. In conclusion, the concept of viviparous reproduction is a remarkable example of nature's adaptability and diversity. It highlights the intricate balance between energy expenditure and offspring survival, showcasing how different species have evolved unique strategies to thrive in their respective environments. By studying viviparous organisms, we gain valuable insights into the complexities of life and the various ways in which species continue to evolve in response to their surroundings.

在广阔的生物学领域中，生物体表现出多种繁殖策略，每种策略都适应其环境和生活方式。一个引人注目的繁殖类别是胎生，指的是那些生下活幼崽而不是产卵的动物。这种繁殖方式在许多物种中都有观察到，包括大多数哺乳动物、一些爬行动物和少数鱼类。理解胎生生物有助于揭示它们所拥有的进化优势，以及它们繁殖策略的生态意义。 术语胎生源于拉丁语，'vivus'意为'活着'，'parere'意为'生育'。这个定义完美地概括了胎生繁殖的本质，在这种繁殖方式中，发育中的胚胎通过母体直接获得营养，通常通过胎盘进行。这种繁殖形式与卵生生物形成对比，后者会产下在母体外发育的卵。由产卵向活产的转变代表了一种重大的进化变化，使得胎生物种能够在各种环境中繁荣发展。 成为胎生的主要优势之一是后代的生存率提高。在许多情况下，胚胎在母体内受到保护，这可以保护它们免受环境危害和捕食。此外，母亲提供的直接营养使得生长和发育更加高效。例如，在哺乳动物中，胎盘促进了母体与胎儿之间营养和废物的交换，确保幼崽在相对于卵生物的孵化后期出生时处于更先进的发展阶段。 此外，在不稳定的环境中，胎生繁殖也可能具有优势。当条件严峻时，例如在干旱或食物短缺期间，母亲可以推迟幼崽的出生，直到条件改善。这种适应性对母亲和她的后代的生存至关重要，使它们能够在资源更丰富时出现。 然而，成为胎生也带来了挑战。怀孕和养活发育中的幼崽所需的能量消耗可能是巨大的。母亲必须在妊娠中投入大量资源，这可能限制她们一生中能产生的后代数量。这种权衡通常导致胎生物种与卵生物种相比，后代数量较少，后者可以以相对较低的单个投资生产大量卵。 此外，照顾活幼崽往往需要更高水平的父母投资。许多胎生物种表现出养育行为，保护和教授幼崽生存技能。这种社会结构可以增强物种内部的联系，并提高下一代的生存率。 总之，胎生繁殖的概念是自然适应性和多样性的一个显著例子。它突显了能量消耗与后代生存之间的微妙平衡，展示了不同物种如何进化出独特的策略，以在各自的环境中繁荣发展。通过研究胎生生物，我们获得了对生命复杂性的宝贵洞察，以及物种如何继续根据其环境进化的各种方式。