Hi there!
A prezygotic isolating mechanism is a mechanism that causes something to happen, not allowing the organisms to breed before fertilization. I'll explain each one for you.
A - That is postzygotic because the organisms were not stopped before fertilization. The result is a sterile organism.
B - Again, that is postzygotic because the organism was produced.
C - This is prezygotic! The sperm dying shows that something is in action to prevent fertilization, meaning that it cannot happen.
D - Fertilization was successful, so it is postzygotic.
ANSWER:
C - the sperm dies when it reaches the female tract
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Answer:Plant the plant cell contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes.
Explanation:
Relief and Climate is what controls the landscape development. We will focus on climate because this is where the life activity included. Some activity weakens substrate is for burrowing and wedging while some strengthens substrate is for binding. This is because of the time, evolution cannot occur without time and continue response to agents with during long periods.
It will be absorbed through roots of the tree