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11Alexandr11 [23.1K]
2 years ago
9

Scientists once believed that modern-day reptiles were the only living descendants of dinosaurs, which were reptiles. Accumulati

ng fossil evidence has now suggested that the most recent dinosaurs gave rise to birds, making birds one of the closest living relatives of dinosaurs.
What statement provides the strongest evidence to support the claim that birds evolved from dinosaurs?
Biology
1 answer:
Stolb23 [73]2 years ago
5 0

Answer:

A biologist discovered a young, four-legged animal. The animal had lungs, seemed to fertilize internally, and its outer surface was covered with scales. In which class of animals is the biologist likely to place the animal?

reptile

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What are Genes that produce alternative expressions of a trait called
Brrunno [24]
The answer should be allele(s).

Alleles are alternative forms of genes. For example in eye color, there is brown eye allele that produces brown eyes or blue eye alleles that produces blue eyes. 

However, note that there may be dominant or recessive alleles. Dominant alleles are always expressed, meanwhile, recessive allele is only expressed when there is no dominant allele existing. 

An example is let say brown eye allele is dominant and blue eye allele is recessive. The eye gene is controlled by 2 alleles. If I had one brown eye allele and 1 blue, my eyes will be brown, because brown eye allele is dominant. 
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How are primary consumers different from secondary consumers
Thepotemich [5.8K]

Answer:

Answer:

<h2>Primary consumers are  those animals that depend on or they eat primary producers. </h2><h2>Secondary consumers are those that eat mainly primary consumers. </h2>

Explanation:

Primary Consumer: A primary consumer is an organism that directly eat primary producer ( plants). They are usually herbivores that eats autotrophic plants, autotrophic plants produce food through photosynthesis. Primary consumer are heterotrophic.

Example: Goat, cow and rabbit.

Secondary consumers: Secondary consumers depends mainly on primary consumers for their food  requirement. Secondary consumers are carnivores  as well as omnivores.

Example;  Owls, bears, lions and humans etc.

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3 years ago
Which of the following will allow for the greatest reduction in an individual’s carbon footprint?
goldfiish [28.3K]

The carbon footprint can be decreased by a great amount if the incandescent bulbs are replaced with the compact fluorescent bulbs. The compact fluorescent bulbs uses approximately seventy five percent less energy than the incandescent bulbs as they do not use heating mechanism to light. This leads  to less emission of the green house gases and thereby reducing the carbon footprint.

Hence, the correct answer is 'option a - replacing incandescent bulbs with compact fluorescent bulbs'.

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