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Yanka [14]
4 years ago
14

Who discovered cell ? and when and how explain

Biology
1 answer:
tino4ka555 [31]4 years ago
8 0

Answer:

cells were first discovered by robert hook in  1665,

Explanation:

he was looking at the dead cell walls of a plant when he discovered them

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Answer all 3 parts of this essay question:
Drupady [299]

Answer:

Explanation:

a)

Even if a periodic table is not color coded, we can still find elements with the same chemical properties. This is easy because when we look at the group to find the elements, we see those that have similar chemical properties.

As an example, the Elements of group 1 forms basic oxides. This is a general chemical property of all group 1 elements.

b)

They have similar chemical properties because all the elements in any group has the same number of valence electrons.

c)

Lithium, Sodium and Potassium.

They're all elements of group 1, they all have 1 valence electron

5 0
3 years ago
How are the 3 stages of cell division similar to how new animals are created?
Vera_Pavlovna [14]

Answer:

Cell divison is defined as the process in which a parent cell split into two or more daughter cells. There are three stages of cell division that includes interphase, mitosis/meiosis and cytokinesis.

In the interphase the proteins, enzymes and cell organelles are formed and at the end of this phase single strand chromosome becomes a double strand carrying genes.

In the meiosis (in sexual reproduction) or mitosis (asexual reproduction) phase, divison of nucleus takes place. Meiosis gives rise to geneticaly different cells due to crossing over while mitosis leads to  identical cells .

Cytokinesis occurs cocurrently after meiosis or mitosis in which cytoplasm of a parental cell divides into two daughter cells each with identical chromatin.

Creation of new animals are also undergo these 3 stages of cell division that is interphase, meiosis (eukaryotes)/mitosis (prokaryotes) and cytokinesis. Majority of animals (eukaryotes) undergo meiosis phase because their mode of reproduction sexual and have genetic variation due to crossing over of chromosomes and produces 4 daughter cells at the end cell division.

Hence, the 3 stages of cell division is similar to craetion of new animals.

5 0
3 years ago
7. Some cancers are caused by mutations that stop certain proteins from working. The inactivation of what kind of protein could
Viefleur [7K]

Answer: p53

Explanation:

In most cases, the p53 gene is mutated, giving rise to a stable mutant protein whose accumulation is regarded as a hallmark of cancer cells.

7 0
3 years ago
Africa and South America are 4,000 km apart. If the plates move away from each other at a rate of 30 km per 1 million years, how
yulyashka [42]

Answer:

The majority of the research shows that the plates move at the average rate of between approximately 0.60 cm/yr to 10 cm/yr. Some sources state that in the North Atlantic, the rate of movement is only about 1 cm (about 0.4 in) per year, while in the Pacific it amounts to more than 4 cm (almost 2 in) annually, while others say that plates, in general, travel from 5 to 10 cm/yr.



The Eurasian Plate is moving away from the North American Plate at a rate the is about 3cm per year. That is about the same rate at which your fingernails will grow.



The distance from New York to London is in 3459 miles (5567 km). What will the distance be in 5 million years?.





The distance from New York to London in 5 million years will be 3552 miles (5717 km). So if today it takes us 7 hours and 30 minutes to fly to London at a speed of 460 miles per hour, in 5 million years at the same rate of speed will take us close to 8 hours.

7 0
3 years ago
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Which minerals are found in the igneous rocks gabbro and basalt
balu736 [363]
Pyroxene and plagioclases feldspar
6 0
3 years ago
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