Meiosis occurs in a series of different phases and creates genetically unique reproductive cells. The process which helps make meiotic cells genetically different and occurs during prophase I, but not during prophase II, is crossing over (C). Crossing over is the exchange of genetic material between two homogenous chromosomes. It is one of the final phases of prophase I. This process is called synapsis. It occurs when the matching regions on the matching chromosomes break and then reconnect to the other chromosome
<span>The answer is Haploid spores germinate to give rise to protonema, which later develops into a sporophyte.</span>
A protonema (plural: protonemata) is a
thread-like chain of cells that forms the earliest stage (the haploid phase) of a bryophyte life
cycle..
<span>A haploid gametophyte ( each of whose cells contains a fixed number of
unpaired </span>chromosomes) gives rise to a <span>diploid sporophyte</span>,.
Gametophytes produce haploid sperm and eggs which fuse to form diploid zygotes
that grow into sporophytes.
Answer:natural active immunity
Explanation:lol it took too long
<span>since plants are at the bottom of the food web and provide the most energy</span>
Answer:
Because of the great deal of active transport that occurs here, the <u>proximal convulated tubules</u> of all the nephrons collectively account for about 6% of one's daily resting ATP and caloric consumption.
Explanation:
Proximal convulated tubule is responsible for transport of a very large number of substances mentioned below :
- Sodium bicarbonate
- Sodium Chloride
- Glucose
- Amino acid
- Organic solutes
- K ions are absorbed via paracellular pathway.
- Water is absorbed passively.
Transporters include :
- Na/K transporter
- Na/HCO3 transporter
- Na/glucose
- Na/Amina acids
As a large number or transporters are present in the PCT , large amouny of ATP is cleaved here, and about 6% of daily resting ATP and caloric consumption occurs.
