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pav-90 [236]
3 years ago
9

which process occurred frequently in the early history of the three domains on earth, and makes determining phylogenetic relatio

nships of that time difficult?
Biology
1 answer:
Degger [83]3 years ago
4 0
The answer is horizontal gene transfer. 

Horizontal gene transfer enables gene flow between genomes of two organisms. It is a common process between different species of <span>prokaryotes and even, between  prokaryotes and eukaryotes. </span>When trying to reconstruct evolution and phylogenetic relationship, scientists face some difficulties because they cannot say the common gene transfer with the horizontal one.
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True or False: Two genes on the same chromosome may become separated during meiosis.​
kakasveta [241]

Answer:Genes that are located on the same chromosome are called linked genes. Alleles for these genes tend to segregate together during meiosis unless they are separated by crossing over. Crossing over occurs when two homologous chromosomes exchange genetic material during meiosis I.

so true

Explanation:

8 0
2 years ago
Why does snakes and frog goes for winter sleep?plz help me fßi need it's and know​
pentagon [3]

Answer:

Explanation:

Snakes, like all reptiles, are cold-blooded (also known as ectothermic). This means they regulate their body temperature by lying in the sun to warm up, or moving into the shade to cool down. Snakes that live in cold climates like ours must seek refuge in a hibernaculum throughout the winter

4 0
2 years ago
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Why would be a consequence if plants could not go through Phototropism?
max2010maxim [7]

Answer:

Explanation:

Phototropism is the growth of organism characterize by their response to light stimulus. It occurs mainly in plant and some Algae.

The response of plant to light enable them use energy from light needed for photosynthesis.

Plant Phototropism characterise some plant growth and development such as flowering,fruiting and seedling formation.

Inability of plant to respond to light reduces it ability to photosynthesize and make sugar needed for their activities ,flower and fruits. It reduces it growth and development.

We have positive and negative response. Positive response is the response of plant towards the direction of light while negative response is the response of plant away from light.

3 0
3 years ago
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What is scientific method ? what are the steps involved in scientific method​
tatuchka [14]
The scientific method steps are
1. Observe
2. Question
3. Hypothesis
4. Production based on the hypothesis
5. Test
6. Use results to conclude if your hypo was right or not.
7. Make a new hypo

The method is a scientific way of finding the answer to your questions. Or in other words. Gathering knowledge that is based on characterized and developed scientific evidence.
6 0
3 years ago
Use the normal ecg trace below to determine how many seconds the trace represents as well as the heart rate.
mezya [45]
Attached is the image of the concerned ECG reading.

In reading the ECG, first you read the heart rate. To read the heart rate, you must count for the number of small boxes in between QRS complexes, specifically R-R intervals. These number of small boxes will then be used to divide 1500. In this example, there are 20 small boxes between R-R intervals. 1500 divided by 20 is 75, so the heart rate of this ECG reading is 75 beats per minute. 

<em>Another way, albeit less accurate, is to count the big squares between R-R intervals and instead of dividing it by 1500, you divide it by 300.</em>

3 0
3 years ago
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