Answer:
The answer is number 3, rust deposits in the ancient ocean.
Explanation:
The question above is highly related to the "Great Oxidation Event" that occurred billions of years ago (or the ancient times).
This event led to an increase in the oxygen, both in the <em>atmosphere, terrestrial and in the oceans. </em>This was primarily because of the existence of <u>"cyanobacteria,"</u> the only oxygen photosynthetic bacteria. Due to this, the oxygen oxidized with the iron in the ocean (which was said to be abundant in those days). Thus, this led to the formation of iron oxides (rust deposits) on the floor of the ocean.
This explains the evidence that the oxygen levels in the sea increased due to photosynthetic bacteria.
Answer:
C As sperm mature, they migrate from the seminiferous tubules into the lumen.
Explanation:
Answer C is false. Different types of germline cells migrate through the seminiferous tubes into the lumen, but not the sperm. Primary spermatocytes located near the basal lamina of the seminiferous tube generate secondary spermatocytes (through meiosis 1) that are located closer to the lumen in relation to the primary spermatocytes; in turn, secondary spermatocytes generate spermatides (through meiosis 2) that are even closer to the lumen. Finally, the spermatides are transformed into sperm through spermatogenesis. Sperms are located very close to the lumen to be released into the lumen through spermiogenesis.
<span>A nerve impulse is an electrical signal that travels along an axon. There is an electrical difference between the inside of the axon and its surroundings, like a tiny battery. When the nerve is activated, there is a sudden change in the voltage across the wall of the axon, caused by the movement of ions in and out of the neuron. This triggers a wave of electrical activity that passes from the cell body along the length of the axon to the synapse. Does this help you?</span>
Ony-cho-pha-gia
hope this helps
The careful use of resources is called CONSERVATION. You can remember this because we are CONSERVING resources, which means to only use them when necessary.
Answer: conservation