Answer:
Option A, Spermatozoa can generally be found in the vagina of a living female after three days
Explanation:
The average life of spermatozoa in the female reproductive tract after ejaculation determines the fertility. Sperm survive for a longer period of time after it reaches the cervix. A spermatozoon (motile sperm) survives for nearly 2.5 hours in the vagina and 48 hours in the oviduct.
However, spermatozoa irrespective of its motility or viability can be found after coital ejaculation in the cervix and vagina even after 12 and 9 days respectively.
Hence, option A is the correct choice of answer
Answer:
The correct answer is- adaptive radiation
Explanation:
Adaptive radiation is the evolutionary process which allow the evolution of many species from a single species because some population of that species get into an environment which is different from their old environment in terms of food availability, predators, etc.
So the first bird that evolved the ability to fly branched into many different species due to habitat change is an example of adaptive radiation. The most famous example of adaptive radiation is Darwinian finches which evolved from an ancestral species of south America that reached Galapagos island.
<span>The white blood cells are the ones who leave the blood and enter
tissues to fight off pathogens and invaders. The answer is letter D. They are
not platelets because platelets help the healing of wounds and prevent it from
bleeding by forming blood clots on the wounded area. They are not red blood
cells because they carry oxygen all throughout the body organs. And they are
not capillaries because capillaries are the ones that transports the oxygenated
blood into the arteries.</span>
The answer is C decomposition
Chloroplasts are found in plant cells