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Soloha48 [4]
3 years ago
5

a _____________ is the of a chromosome pair that attaches to a fiber stretching across the cell during cell division.

Biology
2 answers:
vesna_86 [32]3 years ago
3 0

Answer:

ahhahhhhhhbbhhhhhhbabababababab

nlexa [21]3 years ago
3 0

centromere

i think.

.........

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When you are finished with the microscope, return the scanning lens (4X) to place.

Explanation:

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2 years ago
If polar is positive and non-polar is negative then why can’t a polar molecule pass through the non-polar phospholipid membrane
Ierofanga [76]

Answer:

Because of the chemical and structural nature of the phospholipid lipid by layer the lipid soluble molecule can just pass the lipid membrane and some small molecules can also pass freely.

Explanation:

as we know that the homeostasis is an important process for a  living cell to maintain it self so for the the exchange of materials between the external and internal environment is must so for that it exchange material with the outside environment of the cell.as the cell membrane is semipermeable(mean allow some molecule to pass(lipid soluble) and not others(lipid non soluble) to pass through the membrane.the cell membrane is selectively permeable due to its nature and chemical composition the chemical composition is lipid and  phosphate and glycerol(head) with fatty acid that may b saturated or unsaturated(tail).so finally all those molecule which are polar can not pass through the membrane and  non polar can pass the membrane.The size of the molecule is also a factor on which the permeability depends.

3 0
3 years ago
A scientist is comparing the sequences of related genes among three species. Two of the species have very similar sequences, whi
Brrunno [24]

Answer: d

Explanation: Just took the test

3 0
3 years ago
Please help me, is this answer correct?
dedylja [7]

Answer:

All options are correct

Explanation:

Fossils are the remains of organisms (animals and plants) preserved in a rock. Scientists (geologists & palaebiologists) have used fossils to study the diversity of organisms in the past. This is based on their preserved morphological features. For example, several species of foraminifera has been identified in the rocks. Among them, some species are present today whereas others have become extinct.

Similarly, fossils are the indicators of past climate (e.g. temperature) as well. This means, if a specific species can survive at a particular temperature, its presence suggest that particular environment. For example, corals survive in tropical waters at specific depth and sunlight. So, if we find corals fossils, the cliamte of that particular age would be roughly the similar.

In the end, fossils can also provide evidence of orogeny (mountain building) process. These are typically plants fossils which cannot move and their remains are preserved in the folding rocks.

8 0
3 years ago
Drag the terms on the left to complete the sentences on the right. helpreset more concentrated passive transport less concentrat
devlian [24]

Passive diffusion is a form of passive transport and a type of diffusion by which particles from a high concentration gradient passes through a biological membrane to a low concentration gradient. Diffusion, or simple diffusion on the other hand, is the passage of molecules without the need of a membrane.
5 0
3 years ago
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