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2 years ago

Describe what is happening in steps A-C of the diagram above.

Biology

1 answer:

natali 33 [55]2 years ago

3 0

A) there is a cell and a virus
B) the virus attaches on the receptor on the cell membrane of the cell
C) the virus injects its genetic material in the cell

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Question 5 unsaved in a tide pool, 15 species of invertebrates were reduced to 8 after one species was removed. the species remo

sesenic [268]

The species was a keystone species.

Keystone species are the species that ''hold the ecosystem together''.
They have an important role in the trophic networks (food chains) and often they can even afflict changes in the abiotic part of the ecosystem (change the composition of soil, purify the water, lower the effect of the wind etc)
Therefore, when a keystone species is removed it affects greatly the whole ecosystem.

8 0

3 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:

<u>Available data:</u>

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

3 years ago

The carbon used in photosynthesis comes primarily from the air or surrounding aquatic environment

max2010maxim [7]

The carbon that plants need for photosynthesis comes from carbon dioxide, or CO2 that's present in our atmosphere. Hope it helps

8 0

3 years ago

Read 2 more answers

You catch, tag, and release 35 fish back into a pond. Then, you catch 70 more fish, 12 of which have tags on them. What is the b

Ivenika [448]

Answer:

204

Explanation:

proportion : 12/70 = 35/x

70(35)=12x

2450=12x

204.166667=x

Round : there is about 204 fish in the pond

8 0

3 years ago

If the real interest rates increase in the united states but do not change in europe. what impact does it bring to two countries

gregori [183]

Answer:

Explanation:

A country with higher interest rates often has an increase in the value of that country's currency relative to nations offering lower interest rates.

If there is an interest rate increase in the United States but the interest rate do not change in Europe then the United States currency will increase in value relative to the currency in Europe.

Other Factors that affects the value of a country's currency aside increased interest are:

(1) Political stability

(2) Economic stability.

(3) The demand for a country's goods and services.

(4) country's balance of trade between imports and exports.

5 0

3 years ago