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uysha [10]
2 years ago
13

What do you mean by the term,' Weed'?​

Biology
1 answer:
Evgesh-ka [11]2 years ago
8 0

Answer:

weed means which feed on plants and takes nutrients from them weed also stops the growth of plant

so we have to uproot weed

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Hi, need help with this question!<br> Thank you!
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i think that i dont know

Explanation:

i think that i dont know

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1 year ago
Describe natural selection
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Answer:

Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.

Explanation:

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Suppose that a zygote had only one copy of chromosome 21. Do you think that this zygote would develop into a normal embryo and c
Pie

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el niño tendría síndrome de downEl síndrome de Down es causado por un error aleatorio en la división de las células que tiene como resultado la presencia de una copia extra del cromosoma 21.

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2 years ago
Neurons have special proteins in their cell membranes that allow them to generate electric current. Are these proteins most like
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Answer:

Sodium-Potassium pumps (proteins that help neurons generate electricity) are produced by ribosomes on the rough endoplasmic reticulum (ER).

Explanation:

Sodium-Potassium Pump (NA+/K+):

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Production of Transmembrane proteins:

All membranes and their proteins are produced by  the ribosomes on the rough ER. The rough endoplasmic reticulum contains the enzymes required for lipid synthesis; and as cell membranes are made of lipids, the ER is the most suitable location for synthesis. Membrane proteins, particularly, transmembrane proteins like the Na+/K+ pump possess hydrophobic surfaces that don't dissolve in the cytoplasm but readily attach to the ER surface from where they can be transported wherever required.

7 0
3 years ago
In a PCR reaction, a few seconds at high temperature disrupts the ____ that hold the two strands of DNA together, so every molec
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Answer:

Hydrogen Bonds

Explanation:

In the polymerase chain reaction (PCR) the temperature rises to 90 ° C - 95 ° C, to break the hydrogen bonds, which are the types of bonds responsible for pairing the two strands of DNA, this process is known as denaturation of DNA.

The DNA is extremely stable, due to a large number of bonds (hydrogen bonds) that form between the two strands. If the temperature decreases, these bonds will begin to recompose, until the DNA returns to its original state

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