This chapter describes virus multiplication as a biological process that belongs on the level of the replication of subcellular elements, that is, on the level of cell growth rather than cell multiplication. Virus multiplication is not a process homologous to cell multiplication. All cells capable ...
The testes also produce the male hormone testosterone and a portion of the seminal fluid, the liquid in which sperm are carried. The external location of the scrotum ensures the relatively low temperature that is necessary for the normal development of sperm. After formation, the sperm pass ...
reproductive system- organs and tissues involved in the production and maturation of gametes and in their union and subsequent development as offspring genital system system- a group of physiologically or anatomically related organs or parts; "the body has a system of organs for digestion" ...
Objective To reproduce a type of acute viral asthma model in ovalbumin(OVA)-sensitized BALB/c mice by induction with respiratory syncytial virus(RSV).Methods One hundred mice were randomly divided into five groups: PBS/PBS control group,PBS/RSV group,RSV/RSV group,OVA/PBS group and OVA/RSV ...
A human immunodeficiency virus–discordant couple failed to conceive through in vitro fertilization and intracytoplasmic sperm injection of cryopreserved semen banked by the human immunodeficiency virus–positive partner. The husband subsequently had acquired immunodeficiency syndrome and died. The subsequent tran...
- Viruses reproduce primarily through two main types of reproduction: lytic reproduction and lysogenic reproduction. 2. Lytic Reproduction: - In lytic reproduction, viruses invade a host cell and utilize the host's cellular machinery to replicate themselves. - Once the virus has replicated sufficiently...
Some proteins are on the surface of cells, and this is what pathogens attach to in order to enter the body. If all organisms have different surface proteins, some will naturally be immune to the pathogen. For example, some humans are naturally immune to the virus HIV due to different ...
HIV has been well known as the virus that causes AIDS, which has a high mortality rate. In 2017, although the number of new infected people with HIV has begun to decline gradually, 36.9 million people were living with HIV/AIDS, and 940,000 people died of HIV-related illnesses, worldwide...
Therefore, while the current two-sex model used for land plants assumes that only the sexual states of male and female are to be present in a given species, this article will question that assumption. Based on an examination of the plant life cycle two new models of plant sexual reproductio...
摘要: Vegetative compatibility (vc) -type diversity in Cryphonectria parasiticacomes from several factors such as mutations, migration and sexual recombination of the multiallelic vegetative...关键词: Chestnut blight Chestnut Cryphonectria parasitica Sexual reproduction Vegetative compatibility ...