Asedimentary rock containing a fern fossil was found. what does this tell about the area at the time the rock was formed? the area was hot. the area was covered by an ocean. the area was on land. the area was cold.

A sedimentary rock containing a fern fossil tells that the area was on land at the time the rock was formed.

Explanation:

Ferns are vascular plants that thrive on land. They are mostly found in moist, shades and mountainous area in the country. If a ferns fossil  are found under a sedimentary rock, this only means that previously the area is a land and was not submerged under water. Geological process that takes place over a period of time may have contributed to the change in the location and topography of the area.

fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation:

i believe the correct answer is d