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allsm [11]
2 years ago
10

HeLa cells are a group of cells that were removed from Henrietta Lacks in 1951. These cells have been growing ever since they we

re removed. Which research tool best aids in growing a large number of cells outside of a body over a long period of time?
1. microscopes
2. cell culturing
3. immunostaining
4. genetic methods
Biology
1 answer:
ivolga24 [154]2 years ago
5 0
Answe well be 2 because I take the quiz
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What do cells need to divide?​
worty [1.4K]

Answer:

Haploid cells only have one set of chromosomes - half the number of chromosomes as the parent cell. Before meiosis I starts, the cell goes through interphase. Just like in mitosis, the parent cell uses this time to prepare for cell division by gathering nutrients and energy and making a copy of its DNA.

Explanation:

please mark this answer as brainliest

4 0
2 years ago
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Having a dimpled cheek is a dominant trait (D) and having a non-dimpled cheek is a recessive trait (d). If someone is homozygous
Ksju [112]
Hope this helps you. 

The genes of an organism can be either a homozygous or a heterozygous one. When someone is a homozygous dominant, it means that it has two copies of the same dominant allele. Homozygous means that the organism has exact copies of the same gene allele. 

6 0
3 years ago
Look at the population pyramid. What conclusion can you draw from it?
balu736 [363]

c. Birth rates are high      

Explanation:

A wide base in the population pyramid shows that there is a large population of young people with high fertility rate or birth rate and high death rate.

From the graph, it can also be concluded that narrow tip at the top shows that lesser older people are in the population.

This pyramid shown in the diagram is a triangular age pyramid. In this type of pyramid the pre-reproductive individuals are high   reproductive individual are moderate and non-reproducing individual is less. In such pyramid we find population grows.

Suppose in a family of ten 6 are pre-reproductive, 2 moderate reproductive and 2 post-reproductive. We will see the in the course of moderate and post-reproductive will die and those six of pre-reproducing age will increase the population.

8 0
3 years ago
Food handlers are required to do which of the following at work
kirill [66]

what is the list of things? food handlers usually have to wear hairnets, gloves and wash their hands often to prevent cross contamination and the spread of bacteria.

3 0
3 years ago
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What ultimately happens to the bulk of matter in any traffic level ?
jekas [21]
That as you increase in trophic level 1/10th of the nutrients is lost. Starting at the consumers (plants) all the way to humans. 
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3 years ago
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