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Tamiku [17]
2 years ago
10

Need some help please!!?

Biology
1 answer:
aleksklad [387]2 years ago
4 0
D specialised cells are formed
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In life cycles that alternate between haploid and diploid stages, ____________ acts to reduce the number of chromosomes per cell
777dan777 [17]

Answer:

meiosis_

fertilization

mitosis

zygote

Explanation:

In life cycles that alternate between haploid and diploid stages, ____meiosis_ acts to reduce the number of chromosomes per cell from two sets to one set. In life cycles that alternate between haploid and diploid stages, ___fertilization__ acts to double the number of chromosome per cell from one set to two sets. In life cycles that alternate between haploid and diploid stages, ______mitosis______ acts to keep the number of chromosomes per cell the same. In animals, a single diploid cell called a ____zygote________ divides by mitosis to give rise to all the cells of the adult body.

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2 years ago
Which Properties Of Water Contribute To The Formation Of The Meniscus? Select All That Apply. Check All That Apply High Heat Of
Vladimir79 [104]

The properties of water that contribute To The formation of the meniscus are:

  • cohesion and
  • adhesion

Meniscus is defined as the upward or downward curve located at the surface of a liquid in a tube.

When water is placed in a tube or wettable container, a concave or downward meniscus is formed due to surface tension created in water through the following properties of water:

  • Cohesion: This is the tendency of water molecules to stick to itself.

  • Adhesion: This is the tendency of water molecules to stick to other molecules that are charged or polar.

Therefore, the cohesion and adhesion of water molecules contributes to the formation of meniscus.

Learn more here:

brainly.com/question/13437383

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Which type of microscope is the most widely used and shows cells against a bright background?
gtnhenbr [62]
It is bright-field...............
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2 years ago
Describe the steps in which a gene in passed from parent to offspring. Make sure to describe how the gene is duplicated, separat
Margarita [4]

Answer:

Mitosis occurs in somatic cells; this means that it takes place in all types of cells that are not involved in the production of gametes. Prior to each mitotic division, a copy of every chromosome is created; thus, following division, a complete set of chromosomes is found in the nucleus of each new cell. Indeed, apart from random mutations, each successive duplicate cell will have the same genetic composition as its parent, due to the inheritance of the same chromosome set and similar biological environment. This works well for replacing damaged tissue or for growth and expansion from an embryonic state. Because the genes contained in the duplicate chromosomes are transferred to each successive cellular generation, all mitotic progeny are genetically similar. However, there are exceptions. For example, there are genetic variations that arise in clonal species, such as bacteria, due to spontaneous mutations during mitotic division. Furthermore, chromosomes are sometimes replicated multiple times without any accompanying cell division. This occurs in the cells of Drosophila larvae salivary glands, for example, where there is a high metabolic demand. The chromosomes there are called polytene chromosomes, and they are extremely large compared to chromosomes in other Drosophila cells. These chromosomes replicate by undergoing the initial phases of mitosis without any cytokinesis (Figure 2). Therefore, the same cell contains thick arrangements of duplicate chromosomes side by side, which look like strands of very thick rope. Scientists believe that these chromosomes are hyper-replicated to allow for the rapid and copious production of certain proteins that help larval growth and metamorphosis

Explanation:

hope this helped!

7 0
2 years ago
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