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VARVARA [1.3K]
3 years ago
7

100 points hurry will mark as brainliest⁉️⁉️⁉️⁉️

Biology
2 answers:
weqwewe [10]3 years ago
6 0

Answer:

when refering to growth the cells get bigger rather than multiplying, when talking about development, the cells multiply rather than enlarge

Explanation:

RUDIKE [14]3 years ago
3 0
When talking about growth the cells get bigger rather than multiplying, when talking about development, the cells will multiply rather than enlarge
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Whether during mitosis or meiosis, sister chromatids are held together by proteins referred to as cohesions. Such molecules must
scoundrel [369]

Answer:

1. They must be removed before sister chromatids or homologous chromosomes can separate

Explanation:

During the S-phase of the cell cycle, not only does DNA have to be replicated, but also newly synthesized DNA molecules have to be connected with each other. This replicated DNA (sister chromatids) remain physically connected with each other from S phase until metaphase. This physical connection is called Sister chromatids cohesion.

Sister chromatid cohesion depends on COHESIN, a tripartite protein complex that forms a ring structure to hold sister chromatids together during mitosis and meiosis. Cohesin regulates the separation of sister chromatids during cell division, either mitosis or meiosis. This sister chromatid cohesion is essential for the biorientation of chromosomes on the mitotic or meiotic metaphase spindle, and is thus an essential prerequisite for chromosome segregation. Without the cohesion, sister chromatids would not be segregated symmetrically between the forming daughter cells, resulting in aneuploidy.

Cohesion is established during S-phase of DNA replication, and the cohesins hold the sister chromatid together after DNA replication until anaphase when the removal of cohesin leads to separation of sister chromatids (meiosis II and mitosis) and homologous chromosomes (meiosis I).

8 0
3 years ago
2. Cross a homozygous two horned zork with a heterozygous two horned
Zigmanuir [339]

Answer:

Heterozygous one horned zork.

Explanation:

The Genotypes of the offspring include those listed, but is impossible to contain a B28-9 genotype in the substance. According to that, the one possible genotype would be a heterozygous one horned zork.

3 0
3 years ago
We live in the Cenozoic era, and scientists know more about this era and the epochs it's divided into than any other time period
mel-nik [20]

Answer:

D. We know more about the Cenozoic era because this the most recent time period in the history of the Earth, and we have more information available to study.

Explanation:

The Cenozoic era is the era that is by far the best studied and known by the scientists. The main reason for this is that this era is the most recent one, and it is actually the era we live in. Because it is the most recent era, the Cenozoic is abundant with lot of evidence of what has happened in it. The fossil records are very rich as the fossils didn't had that much time to totally decompose. The rock layers are much younger, so they contain much more detailed evidence of the plant life, climate, changes in the environment. The oceanic crust is also in abundance, which is not the case with the other eras as the oceanic crust is constantly suducted.

6 0
3 years ago
Which would have more effect on the evolution of plants and animals?
S_A_V [24]

Answer:

E. onset of an ice age

Explanation:

8 0
2 years ago
Energy
andreyandreev [35.5K]

Answer:

A

Explanation:

Geothermal power plants, which use heat from deep inside the Earth to generate steam to make electricity.

3 0
3 years ago
Read 2 more answers
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