The joining of male and female gametes in plants is called ___. A. pollination B. fertilization C. germination D. photosynthesis 相关知识点: 试题来源: 解析 B。解析:“fertilization”是受精,指的是植物中雄性和雌性配子的结合。“pollination”是授粉;“germination”是发芽;“photosynthesis”是光合作用。
the presence on an individual body of both male and female sex organs. Also calledandrogynism, gynandrism, gynandry.—hermaphrodite,n.—hermaphroditic,adj. See also:Body, Human -Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved. ...
Eckelbarger, K.J. 1988. Oogenesis and female gametes. Pp. 281-307 in: Westheide, W. and Hermans, C.O. (eds), The Ultrastructure of Polychaeta. volume 4 New York: Microfauna Marina.Eckelbarger, K. J., 1988. Oogenesis and female gametes. In Westheide, W. & C. O. Hermans (eds)...
enabling a better understanding of the hormone regulation mechanism in the female reproductive system [123]. Furthermore, microfluidic chips are revolutionizing the field of assisted reproductive technology, where
The truth is that these notions are hardly more than vagaries of the mind. Male and female gametes fuse in the fertilised egg; they are both suppressed in becoming a new whole. It is false to say that the egg greedily swallows the sperm, and equally so to say that the sperm ...
[68]. It also makes sense that selection is usually weaker on the immobile female gametes, as their function is to keep cell organelles inactive to protect from oxidative stress [42]. Gametes or gametophytes of vascular plants are small, short-lived and thus can be produced in high numbers...
The male testes (or testicles) as in " two together”, considering the slang uses in the Ancient Greek ‘παραστάται‘(i.e. parastátai, “colleagues’), are homologous to the female ovaries. There, the developed and mature structures and functions classic views are that the...
The question arises how the oviduct is able to recognize the presence of gametes and alter its environment in response to them. This question becomes more complex, taking into consideration that sperm itself is a non-self entity for the female reproductive tract and as such should initiate an ...
behaviour, reducing male harassment. We conclude that male ornament and male clustering is a good predictor of female visitation rates, suggesting that females may exert mate choice. Introduction (i) attract more males to a territory—according to the ‘hotshot’ model, males that are more ...
Importantly, two pollen tubes were targeted with higher percentages when both female gametes were unfertilized (∼80%, reported previously by Kasahara et al., 2012). This implies that the two signaling pathways, the egg cell pathway and central cell pathway, are independent of each other and...