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romanna [79]
2 years ago
5

Susan noticed that hummingbirds in her yard visited all the flowers, but especially

Biology
1 answer:
Anna11 [10]2 years ago
5 0

Answer:

to her surprise, she saw hummingbirds bringing small spiders and insects to feed the young

Explanation:

please give brainly!!!!

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The most important force that creates tides is the gravity of the ____________________.
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Moon. The force of the moon constantly pulls the ocean and pushes the ocean.
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Approximately how many genes are found on chromosome 11?
alekssr [168]

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Chromosome 11 likely contains 1,300 to 1,400 genes that provide instructions for making proteins

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3 years ago
Hannah is comparing a rock from a riverbed and a rock from deep underground. One is very smooth, and the other has very rough ed
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The rock found in the riverbed that is smooth is from the result of weathering of water in the river and erosion. The rock deep underground was most likely a product of erosion. The dirt and ground above it were eroded and displaced there to cover the rock.
7 0
2 years ago
What density-dependent growth limiting factors kept the human population relatively low prior to the advent of agriculture?
4vir4ik [10]

Answer:

Limited food supply and competition

Explanation:

Density dependent factors are those which in general lead to reduction of growth rate of population when the population density increases. One of such factor is availability of food and competition.

Whenever the density increased to an extent where the resources or available food becomes scarce or limited,then the growth rate of population decrease.  These factors generally lead to logistic growth pattern of population.  

8 0
3 years ago
What is the genetic basis for lactose intolerance in humans?
uysha [10]

The genetic basis for lactose intolerance is a change in the nucleotide sequence outside of the lactase gene.

Lactose is normally hydrolyzed and broken down in the small intestine.

Lactose intolerance is due to mutations in the MCM6 gene, which regulates the expression of the lactase gene associated with the persistence of enzyme activity in adults.

The lactase enzyme is synthesized from the expression of the LCT gene.

The expression of the LCT gene is regulated by a protein complex (MCM), which is partly encoded by a specific sequence of the MCM6 gene located on chromosome 2q21.

A genetic alteration of this gene, specifically in position 13910, is responsible for the persistence or non-persistence of lactase in the adult.

The nucleotide sequence C / C (Cytosine / Cytosine) would be the one present in the non-persistence of lactase.

Therefore, we can conclude that lactose intolerance is due to a decrease or absence of the activity of the lactase enzyme and that it is due to a change in the nucleotide sequence that helps to control the expression of the LCT gene.

Learn more about lactose intolerance here: brainly.com/question/17178339

6 0
3 years ago
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