Which substance compose the backbone of DNA

Biology

1 answer:

madreJ [45]3 years ago

4 0

Answer:

phosphate and deoxyribose

Explanation:

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If b represents the allele for black eyes (dominant) and b represents the allele for orange eyes (recessive), what would be the

Sever21 [200]

1 black: 1 orange The heterozygous black-eyed MendAlien has the genotype Bb. The orange-eyed MendAlien has the genotype bb. The result of this cross is two Bb offspring and two bb offspring. This means that two of the offspring have black eyes and two of the offspring have orange eyes. This 2:2 ratio then reduces to 1:1

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4 years ago

There are almost 10,000 known bird species on the planet. How did they evolve into so many unique forms?

olga55 [171]

Answer:

Natural selection.

Explanation:

Imagine in the beginning there was a single species of bird. Naturally, this bird had to expand to the rest of the world, and was distanced as the continents drifted off. But this bird had to cope with various climates and environments. So the bird would gradually mutate over time. The bird in the jungles of central america would develop different colors and a shaped beak, and would better help it survive. This led to being the new normal for birds of this area. It would evolve to cover all the surviving birds in the region, until it is so drastically changed then it is a new species. There are so many different environments, each with its own challenges to overcome, so so many different bird evolve to survive them.

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3 years ago

What is photosynthesis?

Lilit [14]

Answer:

it's number 4.the process that use energy from the sun ,with carbon dioxide and water ,to make glucose and oxygen

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The history of life on earth is recorded in

qaws [65]

The Bible. Specifically in the book of Genesis