The presence of wings in flightless birds, such as the ostrich, can be best interpreted as:

What happens to a spermatid to change it into a sperm cell? Meiosis occurs, making the sperm cell haploid. The nuclei of two polar bodies fuse, making a diploid cell. A tail is added, making the sperm a motile cell.

Fungi that decompose dead organisms a. can cause serious disease in plants. b. live in symbiosis with other organisms. c. return important nutrients to the soil. d. are often called pioneer organisms.

The bases in the "rungs" of the DNA ladder are joined by bonds.

Why is a virus considered a non-living thing?

What are some events in the real world that might cause a significant percentage of a population or species to be killed or otherwise prevented from reproducing?

Why are phospholipids ideal for making up the selectively permeable membrane?

5. What type of bond can be found between complementary nitrogenous bases?

Which field of biology focuses on heredity and dna?

What property of water was demonstrated by fold and float

How does a mutation in a sex cell differ from a mutation in a non-sex cell?