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2 years ago

Flowering plants were most common plant during what era

Biology

1 answer:

Naya [18.7K]2 years ago

8 0

Answer:

Cretaceous

From their earliest diversification in the Cretaceous Period (145 million to 66 million years ago), angiosperms rapidly came to dominate the land flora. Today there are more than 300,000 species of flowering plants, which account for more than 90 percent of the diversity of vascular plants.

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URGENT WILL GIVE BRAINLY FOR RIGHT ANSWER

Paha777 [63]

The answer will be F planet A orbits it’s star faster than planet B

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2 years ago

How many different amino acids are there that make up all of the proteins in our body

NNADVOKAT [17]

Answer: billions of types of proteins

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2 years ago

In his attempt to develop a pneumonia vaccine, Frederick Griffith injected mice with various combinations of living and dead bac

n200080 [17]

Answer:

The mice died

Explanation:

In Griffith's experiment, two strains of the same bacteria were used. S strain was smooth because it had a polysaccharide coat. This coat also made it virulent because mouse immune system was not able to destroy it and ultimately the mice died. R strain was rough because it did not have the coat and thus was harmless to mice.

When Griffith injected mice with dead S bacteria and living R bacteria together, the mice died. Live R bacteria had taken up the genetic material or as Griffith called "transforming principle" from the dead S bacteria and transformed into S bacteria. So live S bacteria were present again and they killed the mice.

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2 years ago

The ability of the human body to break down the red color in beets is controlled by an autosomal dominant allele. The inability

Zinaida [17]

Answer:

Explanation:

Let the ability to break down the red color in beets be represented by the allele B. The inability would be represented by the allele b.

A nonsecretor's genotype would be BB or Bb while a secretor's genotype would be bb.

A nonsecretor woman with a secretor father would be a carrier with genotype Bb. A nonsecretor man who in a previous marriage had a secretor daughter would also be a carrier with genotype Bb. If the two marries:

Bb x Bb

BB 2Bb bb

(a) probability of their first child will be a secretor girl = probability of having a girl and being a secretor.

Probability of having a girl = 1/2

Probability of being a secretor = 1/4

probability of their first child will be a secretor girl = 1/2 x 1/4 = 1/8

(b) Probability of their first child being a nonsecretor girl = probability of having a girl and being a nonsecretor.

Probability of having a girl = 1/2

Probability of being a nonsecretor = 3/4

Probability of their first child being a nonsecretor girl = probability of having a girl and being a nonsecretor = 1/2 x 3/4 = 3/8

2. Probability that their first two children will be nonsecretors of either sex = probability of their first being a nonsecretor and of either sex and probability of their second being a nonsecretor and of either sex.

= 3/4 x 3/4 = 9/16

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3 years ago

Protist get energy by

marin [14]

Protist manufacture their own energy by photosynthesis (using sunlight)

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2 years ago