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PIT_PIT [208]
2 years ago
6

Compared to australopithecines and modern humans, what were Homo erectus limb bones?

Medicine
1 answer:
PtichkaEL [24]2 years ago
5 0

Answer:

The correct answer is option B. more robust.

Explanation:

Homo erectus was much later to australopithecines and more like homo sapiens with a body like homo sapiens. Homo erectus has broad shoulder, longer joint bones and hip bones in Comparision of australopithecines.

Australopithecines were more like apes with the curved rib cage and were dependent on plants for their food while Homo erectus has a more robust body and first hominins to hunt and gather food.

Thus, the correct answer is option B. more robust.

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What is nondisjunction? ______________ When does it happen? _______________ What is the result? __________ Name some examples __
BARSIC [14]

Answer:

The process of reproduction is a pretty complex one, and there are several steps that are taken that, if taken wrong, can lead to abnormalities. The most important thing to know is that all humans have two sets of 23 chromosomes, one from each of their parents. The correct process of egg and sperm formation is meiosis, and it will ensure that from the originating cell, the gametes (or eggs) formed, will have the total amount of chromosomes needed.

During this process of meiosis, the chromosomes should be separated and evenly divided. But first, DNA replication must take place. This means that first two homologous chromosomes, and are created so that all new cells will have the same DNA information. This happens in Meiosis I, Anaphase I. On the second phase of meiosis, in its anaphase (meiosis II, anaphase II) a new division will happen, but this time, of sister chromatids. This separation process is called disjunction.

So, in answer to the question above, we have that:

1. Non-disjunction: is when the two pairs of homologous chromosomes (in meiosis I, anaphase I), or the two sister chromatids (in meiosis II, anaphase II), do not separate, or parts remain with the other.

2. This happens during two phases of Meiosis: Meiosis I, anaphase I and Meiosis II, anaphase II.

3. The result can be two cells with extra copies of chromosomes, and the other missing that extra pair of chromosomes and in the case of nondisjunction in anaphase II, the results can be: two normal haploid cells, and the other two will, one have an extra chromosome, and the other, be totally missing it.

4. Some examples of these situations, when female and male gametes unite to form a baby, would be: Trisomies (extra copies of chromosomes) and Monosomies (absent normal numbers of chromosomes).

5 0
3 years ago
QUESTION 4
olga55 [171]

Answer:the hip

Explanation:

You place it closest to the missing limb so if it was the arm you would clip near shoulder.

4 0
3 years ago
What are the different sections of the nephron?
Lesechka [4]

Answer:

Each nephron is composed of a renal corpuscle (glomerulus within Bowman's capsule), a proximal tubule (convoluted and straight components), an intermediate tubule (loop of Henle), a distal convoluted tubule, a connecting tubule, and cortical, outer medullary, and inner medullary collecting ducts.

Explanation:

5 0
3 years ago
Read 2 more answers
7 on the pH scale is considered ____________ where the number of hydroxide (OH) ions is equal to the number of _________ ions.
VashaNatasha [74]

Answer:

Neutral; protons (H+)

Explanation:

At neutral pH, the hydroxide and proton ions are equal.

4 0
3 years ago
Anemia can be caused by a diet lacking in which nutritional substances?
wel

Answer:

The best answer to the question: Anemia can be caused by a diet lacking in which nutritional substances?, would be, D: Folic acid and vitamin B12.

Explanation:

Anemia, is usually defined as a problem in the formation of red blood cells, or, erythrocites. Usually, there are a number of nutrients, such as vitamins and minerals, that play a vital role in the formation of these erythrocites. One such mineral is iron, which is why, when it is lacking in the diet, it can cause an anemia called iron-deficiency anemia. In this case, the anemia, which is either a reduced production of red-blood cells, or, cells that are incapable of carrying out their duty as oxygen-transporters, is caused by a dietary deficiency. Another form of this can be when the body itself, through an illness, is incapable of producing these cells. However, aside from iron, there are other two nutrients that are vital in the correct formation of erythrocites, and in their being efficent transporters: folic acid, also known as folate, and vitamin B12, both necessarily supplied by the diet, as the body cannot produce them.

5 0
3 years ago
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