Answer:
AB, ab, Ab and aB
Explanation:
The zygote has the genotype <em>AaBb </em>because it was formed by the fusion of a sperm cell <em>AB</em> and an egg <em>ab</em>.
During meiosis the diploid <em>AaBb</em> germ cell will reduce its chromosome number by half, producing a total of 4 haploid daughter cells (the gametes, in males the sperm cells) with just one allele per gene. The genes <em>A </em>and <em>B</em> are on different chromosomes, so they assort independently, and 4 types of gametes can therefore be produced: <em>AB, Ab, aB </em>and <em>ab</em>.
As guard cells become turgid, the stomata fully open and gases and water vapor are allowed to pass through it. When the plant is full of water, the guard cells fill up to become plump and turgid, making the stomata open so gases can be exchanged for photosynthesis. When the plant is short of water the guard cells lose water and become flaccid, making the stomata close, this helps stop too much water vapor escaping.
Answer:
Nonrenewable energy resources, like coal, nuclear, oil, and natural gas, are available in limited supplies. This is usually due to the long time it takes for them to be replenished. Renewable resources are replenished naturally and over relatively short periods of time.
Explanation:
Answer:
A
Explanation:
Small sacs of fluid called bursae cushion the Achilles tendon at the heel. The Achilles tendon is the largest and strongest tendon in the body. When the calf muscles flex, the Achilles tendon pulls on the heel.
The answer is population density
