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Art [367]
3 years ago
9

Primary growth or lengthening of plants results from mitotic division in cells of which tissue? A.Axillary buds B.Lateral merist

em C.Apical meristem
Biology
1 answer:
Anastaziya [24]3 years ago
7 0
The correct answer is (b.) Lateral meristem. Primary growth or lengthening of plants results from a mitotic division in cells of a tissue, lateral meristem. This meristematic tissue are group of cells that has the ability to divide. 
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What is crossing-over, during what phase does it occur, and what is its significance?
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Crossing over is a biological occurrence that happens during meiosis when the paired homologs, or chromosomes of the same type, are lined up. Hope this helps :)

Explanation:

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c-Met is an oncogene that contributes to the development of certain cancers by triggering cell division and tumor growth. In a 2
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G1 phase cell cycle arrest and apoptosis

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According to Yan and colleagues 2009 article, cells that were transfected with microRNA-1/206 showed cell cycle arrest at the G1 phase and showed an increase in apoptosis (programmed cell death) which is important for synthesis of mRNA and protein. These processes have a direct effect on cell proliferation by decreasing it.

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1. The body has different types of defences against pathogens.
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2and3 only are the defense
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how the cells in your body are different from one another. Look at the different types of cells above, and make a list of how th
kotegsom [21]

Answer: Different cells have different jobs to do. Each cell has a size and shape that is suited to its job. Cells that do the same job combine together to form body tissue, such as muscle, skin, or bone tissue. Groups of different types of cells make up the organs in your body, such as your heart, liver, or lungs.Differentiation means that one cell performs a different function than another cell, depending on where it is in your body. ... All the cells contain the same genetic material and all of them are from one original cell that started as a fertilized egg, but they look different and act different from one another. Under a microscope, fat cells look like bulbous little spheres. Like other cells in the body, each has a cell membrane and a nucleus, but their bulk is made up of droplets of stored triglycerides, each of which consists of three fatty-acid molecules attached to a single glycerol molecule. Skin cells are specialized to be quickly shed and replaced, and do not have much mitochondria (which helps produce energy). Muscle cells, conversely, have lots of mitochondria because they need energy to produce movement. Unlike many other cells, red blood cells have no nucleus and can easily change shape, helping them fit through the various blood vessels in your body. Unlike most other eukaryotic cells, mature red blood cells don't have nuclei. When they enter the bloodstream for the first time, they eject their nuclei and organelles, so they can carry more hemoglobin, and thus, more oxygen. Each red blood cell has a life span of around 100–120 days. Skin cells are specialized to be quickly shed and replaced, and do not have much mitochondria (which helps produce energy). Muscle cells, conversely, have lots of mitochondria because they need energy to produce movement. brainliest??

Explanation:

4 0
2 years ago
The trait of medium-sized leaves in iris is determined by the genetic condition PP′. Plants with large leaves are PP, whereas pl
dsp73

Answer:

20 large size leaves plants

40 medium sized leaves plants

20 small sized leaves.

Explanation:

PP = large leaves

P'P' = small leaves

PP' = medium leaves

PP' was crossed with another PP' plant:

PP'   x   PP'

progeny = PP, 2PP', and P'P'

PP = 1/4  x 80 = 20 large size leaves plants

PP' = 1/2 x 80 = 40 medium sized leaves plants

P'P' = 1/4 x 80 = 20 small sized leaves.

<em>Hence the phenotypes would be:</em>

<em>20 large size leaves plants</em>

<em>40 medium sized leaves plants</em>

<em>20 small sized leaves.</em>

6 0
3 years ago
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