The Crossover of chromosomes occurs during the prophase 1 phase of meiosis.
<h2>Further Explanation
</h2><h3>Cell division </h3>
- Cell division is the process in which cells within an organism undergoes division to give rise to new cells.
- There are two types of cell division, namely:
<h3>Mitosis </h3>
- Mitosis is a type of cell division that occurs in the somatic cells or the body cells where cells divides to give new cells that are similar to the parent cell.
- The daughter cells have the same number of chromosomes as the parent cells.
- For example in humans the parent cells are diploid, 2n, while the daughter cells are also diploid, 2n. (Diploid means each cell has two pairs of chromosomes).
<h3>Meiosis </h3>
- This is a type of cell division that takes place in the gonads, or reproductive organs, in which cells divide to form daughter cells that differ genetically with the parent cells.
- The daughter cells contain half the number of chromosomes, haploid, n, while the parent contain a diploid number, 2n, of the chromosomes.
- Meiosis occurs in two phases, that is, meiosis I and meiosis II
- During the process of meiosis several processes occurs that cause genetic variation among organisms. These processes include, crossing over, independent assortment of genes, among others.
<h3>Crossing over </h3>
- Cross over is the process that occurs during the prophase I phase of the first stage of meiosis known as meiosis I.
- During the process of crossing over, genetic material is exchanged between homologous chromosomes which enhances the genetic variation in organisms.
Keywords: Cell division, meiosis, mitosis, prophase I, crossing over
<h3>Learn more about:
</h3>
Level: High school
Subject: Biology
Chapter: Cell division
Sub-topic: Meiosis
Answer:
Mutualism
Explanation:
Mutualism is also referred to as inter specific cooperation, a phenomenon in which two organisms from two different species co-exist in such a way that both get benefit from each other, either from their activities or from their fitness. Such behavior is commonly termed as cooperation.
Here in example, we see that saguaro cactus provides food for the white-winged dove through its large fruit. The bird eats that fruit but along with fruits it also ingests the seeds present in fruits. SO, when the bird flies to some new location, it drops the seeds there. In this way cactus can colonize new lands and spread offspring in new places while birds get their food. Both get benefit so it was a mutulalistic relationship.
Hope it help!
An example of a parasite would be a worm in your intestine
Answer:
Behavioral adaptation
Explanation:
life-cycle adaptation would be like a tadpole growing legs.
physical adaptation would be a change in the animals body like wings for a bat.
reproductive would be beneficial for making offspring like a peacocks bright feathers that attract mates.
Behavioral adaptations are responses to external stimulus like heat.
So behavioral is the best option.
Answser
it migth be B i am not sure