Answer:
500-million-year-old fossil found in BC is ancient ancestor of spiders and scorpions. Palaeontologists in British Columbia have found a fossil of the oldest known ancestor of scorpions and spiders.
Answer:
Vulvodynia
Explanation:
Vulvodynia is the medical term used to describe a chronic condition of long-lasting, severe pain around the vaginal orifice, which feels raw. Medically, the severe pain lasts for at least three months either constantly or occasionally. The pain could be generalized throughout the entire vulva or localized to a certain area of the vagina like the opening of the vagina.
Vulvodynia is usually doesn't have an identifiable cause, because it usually not traced to an infection.
Answer:
The three basic types of adaptations, based on how the genetic changes are expressed, are structural, physiological and behavioral adaptations. Most organisms have combinations of all these types
Explanation:
Answer: D. None of the above
Explanation:
Heredity can be defined as a biological process that involves the passing on of characters or traits from parents to their offsprings genetically. These traits can be physical for example, height, colour of eyes or mental for example, intelligence.
Answer:
1/2 IAIB, 1/2 IBIB (es decir, 50% IAIB y 50% IBIB)
Explanation:
El grupo sanguíneo está determinado por un gen que posee tres diferentes variantes o formas alélicas:
alelo A: IA
alelo B: IB
alelo O: IO
Los alelos IA y IB son codominantes entre sí, es decir, un portador de ambos alelos será de grupo sanguíneo IAIB. Por otra parte, tanto el alelo IA como el alelo IB son dominantes del alelo IO recesivo. En este caso, el cruzamiento entre un individuo heterocigota IAIB con un individuo homocigota IBIB dará como resultado una descendencia 1:1 de heterocigotas IAIB y homocigotas IBIB (es decir, 50% IAIB y 50% IBIB), ya que la madre producirá ambos tipos de gametos en proporciones equivalentes (1/2 IA y 1/2 IB), mientras que el padre sólo producirá gametos IB.
