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3 years ago

Which primary vector helped carry zebra mussels into the Great Lakes? A. wood boxes B. fish C. fungus D. ship ballast E. birds

Biology

2 answers:

Finger [1]3 years ago

7 0

I'm pretty sure your answer should be D. Ship Ballast. Hope this helps! =^-^=

adelina 88 [10]3 years ago

3 0

Answer:

D. Ship ballast

Explanation:

Zebra mussels are the invasive species that have adaptive features to allow them to invade the new ecosystems. They have floating larva that can be transported along with running water. Also, the adult form of zebra mussels have ability to attach themselves to various substrates such as boats and ship ballasts. The primary factor for introduction of the species in Great Lakes is attachment of the species to the ship ballast that enter the lake.

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The fertilization of ovules from Plant Q by pollen from Plant R results in the production of seeds. What percent of the genes in

blagie [28]

Answer:

The correct answer is - option A. 0%

Explanation:

The zygote formation or fertilization in flowering plants occurs by the fusion of pollen of one plant with the ovum of another plant of the same species normally. This process includes the exchange of an equal amount of the genetic contribution from both plants.

The egg cell of the mother is responsible for the mitochondria and chloroplast of the progeny so the percentage of chloroplast genes provided via Plant R is 0% as ovum and egg cell comes from only plant Q.

percentage of chloroplast gene inherited from R plant is a)0%

3 0

2 years ago

A white rooster mates with a black hen. The offspring is gray in color. What is this phenomenon called? A. codominance B. coinhe

Alona [7]

I am pretty sure the answer is B

5 0

3 years ago

Put the following list in order from beginning to end of a food chain.

steposvetlana [31]

Answer:

1-4-2-6-5-3

Explanation:

Hope it helps

3 0

3 years ago

Read 2 more answers

Which of the following statements about minimum payments Is incorrect

LekaFEV [45]

If you send in the minimum payment, you will be charged a late fee.

5 0

3 years ago

Hershey and Chase used radioactive isotopes to label different parts of the phage. They grew one batch of phage in the presence

AlekseyPX

The sulphur would lable the capsule and the phosphorous the nucleic acid.

<h3><u>Explanation</u>:</h3>

Hershey and Chase experiment included growing of the pages in two batches, one in presence of 35S and other in presence of 32P. They then infected bacterial cells with these phages, cleaned them and then centrifuge the cells to isolate the marked elements in bacterial cells.

This was done to isolate which part of the phage is actually infective. Sulphur being a part of the proteins will mark the capsule whereas DNA having the phosphate bridges will be marked by 32P.

5 0

3 years ago