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2 years ago

PLEASE I REALLY NEED YOUR HELP I´LL GIVE BRAINLIEST

Biology

2 answers:

Nataly [62]2 years ago

6 0

Answerits its d

Explanation:

i took that test

erma4kov [3.2K]2 years ago

4 0

Answer:

D the train

Explanation:

The train is safe very fast and was the first built

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What would most likely happen to the chipmunk population in 2014 if the population went up to 22 million in 2013? mc026-1.jpg Th

tigry1 [53]

The chipmunk population would crash.

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2 years ago

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What type of energy is used by your body when you eat food?

Aleks [24]

The answer to your question is chemical energy

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2 years ago

In a unique species of plants, flowers may be yellow, blue, red, or mauve. All colors may be true-breeding. If plants with blue

Zolol [24]

Answer:

F1) 100% bbRr, red flowered plants.

Explanation:

Available data:

flowers may be yellow, blue, red, or mauve
colors may be true-breeding
the cross of blue-flowered plants with red-flowered plants, produce plants that have yellow flowers
F2 generation: 9/16 yellow, 3/16 blue, 3/16 red, and 1/16 mauve.

Knowing that the phenotypic ratio is 9:3:3:1, we can assume that there are two genes involved in the flower color expression. We can name these genes B and R with a dominant and a recessive allele each (B, b and R, r respectively).

According to the first cross, we might establish the following genotypes:

1st Cross: blue-flowered plant x red-flowered plant

Parentals) BBrr x bbRR

Gametes) Br, Br, Br, Br bR, bR, bR, bR

F1) 100% BbRr, yellow plants

Parentals) BbRr x BbRr

Gametes) BR, Br, bR, br

BR, Br, bR, br

Punnett square) BR Br bR br

BR BBRR BBRr BbRR BbRr

Br BBRr BBrr BbRr Bbrr

bR BbRR BbRr bbRR bbRr

br BbRr Bbrr bbRr bbrr

F2) 9/16 yellow ---> 1/16 BBRR + 2/16 BBRr + 4/16 BbRr + 2/16 BbRR

3/16 blue ------> 1/16 BBrr + 2/16 Bbrr

3/16 red---------> 1/16 bbRR + 2/16 bbRr

1/16 mauve ----> 1/16 bbrr

So,

Yellow-flowered plants: BBRR, BBRr, BbRR, BbRr
Red-flowered plants: bbRR, bbRr
Blue-flowered plants: BBrr, Bbrr
Mauve-flowered plants: bbrr

According to these genotypes, the second cross would be like following,

2nd Cross: true-breeding red-flowered plants with true-breeding mauve flowered plants.

Parentals) bbRR x bbrr

Phenotype) Red Mauve

Gametes) bR, bR, bR, bR br, br, br, br

Punnett square) bR bR bR bR

br bbRr bbRr bbRr bbRr

F1) 100% bbRr, red flowered plants.

6 0

2 years ago

In a a person is assigned a status at birth and remains at that level throughout life.

alex41 [277]

Answer:

When a person is assigned a status at birth and must remain in it throughout his or her life, it is a caste system.

Explanation:

A caste system is applied in some societies and consists of the assignment of an individual to a social stratum by birthright, being forced to remain in that status and even relate to people of the same social category and allow endogamy.

It is a system that exists in ancient societies, an example being the Hindu caste system or South African apartheid. Other cultures that made use of the caste system were the Arab and Hebrew.

Unlike the caste system, the class system consists of inclusion in a specific social class, without the intervention of the birthright.

Learn more:

Caste system brainly.com/question/108900

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2 years ago

There are ongoing arguments among taxonomists as to which phyla represent the closest relatives of phylum Annelida. Some propose

NikAS [45]

Answer:

a. the segmented body plan of the annelids

Explanation:

lophotrochozoan is a taxonomy of animals that includes annelids, bryozoans, and brachiopods.

This taxonomy of creatures was defined in 1995 as the last ancestor of the taxa of worms, mollusks, and annelids. Their classical definition depends on the topology of the spiral tree of life.

Annelids have a segmented body part wherein the external morphological features are repeated in every body segment. It allows the animal to become bigger and makes their movement more fat and efficient.

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2 years ago

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