Answer:
Their sons have 50% chance of having XLA.
Explanation:
X-linked agammaglobulinemia (XLA) is a genetic disorder that affects person immune system or ability of the body to fight against Infections. A person with XLA disease have few B cells which are specialized white blood cells for fighting Infections. If a female have XLA disease she has 50% chance of transmitting disease to their sons. A male has 50% chance of having XLA and female 25% chance.
Answer:
White
Explanation:
Some times when we look at some objects they appear to be different in color to us than their actual color. It may be due to several wavelength of light with different intensities is striking on our eye.
Remember, white is not a color it is just produced in response to combination of 3 or more than three colors like light.
The three colors that can be combined at full intensity to form a white color are called as primary colors. The most common set is
Red+Green+Blue= white
Zero intensity of each component gives darkest color and full intensity of any component give a white color.
Secondary colors can be produced by the addition of two colors such as;
Red+Green=Yellow
Red+Blue=Magneta
Green+Blue=Cyan
Answer: Mosses retain soil humidity and prevents its degradation, besides are habitat for little invertebrates.
Explanation: Mosses are non-vascular plants (they don't have conductive vessels as xylem and phloem) that live places as tree trunks, rocks, walls and soils. This habitats must be humids because mosses need water for nutrient transport, because they don't have cuticle (prevents water lost) and for fertilization. Mosses are important for the ecosistems where they live because retain water in the soils thus prevent erosion and harbor invertebrates as Tardigrades (water bears).
