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S_A_V [24]
3 years ago
8

What area of the brain associated with attention and concentration is completely myelinated by the time a child is five years of

age?
Biology
1 answer:
andreev551 [17]3 years ago
3 0

<span>Reticular formation is the area of the brain associated with attention and concentration that is completely myelinated by the time a child is five years of age. This is related with the growing attention span of the children as they are preparing to go to school,</span>

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These cells are part of the domains Archaea and Bacteria.
satela [25.4K]
<span>Archaeas and Bacterias are both Prokaryotes. Both used to be classified in Monera kingdom, but later genetists found that they have actually very different genes, despite they both have a similar metabolism. So they think they have a totally different evolutionary origin and they decided to classify them in 2 different domains. The other domain, Eukarya, includes every other organism (all the ones who are not Prokaryots), which are: plants, animals, fungi and protists.</span>
8 0
2 years ago
Identify Phases of meiosis 1
azamat

Answer:

Prophase, Meataphase, Anaphase and Telophase

Explanation:

Prophase-

The chromosomes begin to condense and the nuclear envelope breaks down.

Metaphase-

Pair of homologous chromosomes move to the eqautor of the cell.

Anaphase-

Homologous chromosomes move to the opposite poles of the cell.

Telophase-

Chromosomes gather at the poles of the cells. Cytoplasm divides.

4 0
2 years ago
A person that is heterozygous type AB (AB) marries a person that is heterozygous type A (AO). What is the probability that their
BigorU [14]

Answer:

The correct option is <em>B. 25 %</em>

Explanation:

 A heterozygous type can be described as the type in which both the alleles of a gene are different. If both the alleles of a gene are similar in an organism, then the person is said to be homozygous for the trait.

In the above question, two heterozygous parents are to be cross- bred to check the probability of them producing homozygous alleles (AA).

A punnet square made will show the following results:

       A     O

A     AA    AO

B    BA     BO

Hence, there will be 25% chance that the offspring produced could be homozygous AA.

6 0
2 years ago
Anton Von Leeuwenhoek verified Robert Hooke's discovery of?microscopes,oxygen,cells,and chlorophyll
Mariana [72]
Anton Von Leeuwenhoek verified Robert Hooke's discovery of cells.
4 0
3 years ago
Read 2 more answers
Prior to the 1600s it was believed that all living things were either plants or animals. Which of these inventions led to the de
hram777 [196]

Explanation:

Microscopes are instruments used for viewing microscopic cellular structures, not visible with the human eye. With an arrangement of lenses, and manipulation of light or electrons, these magnify very small objects. Light microscopy uses light and multiple lenses, while electron microscopes use electrons. These create larger images of objects.

Subcellular components and molecules require the closed system of the cell in order to function with different arrangements and features being key to certain phyla, groups and species; this aided in the reclassification of organisms into the kingdoms and phyla we know today.

Further Explanation:

Biology's unifying principle states that cells are the basic units of biological organisms. Cells sharing a similar origin, group together in the body to form tissues; these typically share physical features and are arranged in regular patterns. All living things, grow, respire, reproduce etc. these processes are carried out by cells, which are thus integral to their survival.

Before the discovery of cells by Robert Hooke in 1665 with a simple microscope, many scientists had long believed that life rose spontaneously over extended periods of time. Circa 1668 Francesco Redi, challenged the idea of spontaneous generation of maggots from rotting meat by placing meat in various sealed open, partially sealed and sealed containers. Sealed containers did not show the presence of maggots, and he theorized that these were likely from eggs laid on the meat by flies. This was the development of the theory of abiogenesis (cells arise from other living cells); this eventually proved the unifying principle we know today.

Cell theory states that living things are comprised of cells, as their smallest units capable of functioning. Microscopy helps to prove this, as cells and their varying components can readily be seen, observed and later classified. Their components and molecules require the closed system of the cell in order to function with different arrangements and features being key to certain phyla, groups and species; this aided in the reclassification of organisms into the kingdoms and phyla we know today.

Learn more about cellular life at brainly.com/question/11259903

Learn more about tissue types at brainly.com/question/8487952

#LearnWithBrainly

5 0
2 years ago
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