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Paul [167]
3 years ago
7

PLEASE HELP WILL MARK BRAINLEST

Biology
1 answer:
STatiana [176]3 years ago
3 0

Answer: genetics and mutation generate some of the variety that natural selection acts on

Explanation:

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The San Andreas fault lies along the boundary of the: North American and Pacific plates South American and Pacific plates North
Scilla [17]

Answer:

Ok, I don't know if this will help any, but it is in the Gulf of California.

Explanation:

I'm pretty sure that those are the North American and Pacific plates?

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3 years ago
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How do round, spiral, and rod-shaped bacteria look like?
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There are thousands of bacterial species and they are not identical towards one another, therefore there forms are quite unique. so its just there characteristics that make up how bacteria look like.
Hope this answers your question. 

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The virulence factor associated with the events of gram negative sepsis and septic shock is _____
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<span>There are many factors associated with the events of gram negative sepsis and septic shock such as risk factors for organ dysfunction, infection, contingent upon developing infection.  Other factors include residence in care facilities for long time, use of immunosuppressive medications, prosthetic devices, and malnutrition.</span>

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What do scientists do to aquire new knowledge​
Anettt [7]

Scientists often perform experiments to check and recheck their work.  They also redo these experiments to ensure correct results.

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4 years ago
The Brazil nut tree, Bertholletia excels (n = 17), is native to tropical rain forests of South America. It is a hardwood tree th
Anna71 [15]

Answer:

Answer is option A.

Orchid bees are to Brazil nut trees as breezes are to pine trees.

Explanation:

In Brazil nut trees, the female orchid bees act as pollinators that help in pollination. In pine trees, wind or breeze helps in pollination.

Pine trees are gymnosperms and so they do not have flowers to attract pollinators like bees or butterflies or birds. They are wind-pollinated. Pine trees are monoecious i.e., both male and female reproductive structures (pine cones) are present on the same tree.

The male cones (catkins) produce pollen grains that are lightweight, less sticky and have air bladders or small wing-like structures. As a result of these features, the pollen grains can be easily carried and dispersed by the breeze. In order to prevent self pollination (pollen falling on the female cones of the same tree), the male cones are normally located on the lower branches of the pine tree.  

The female cones are located on the upper branches of the tree and the center of the cone contains eggs or ovules. The pollen grains that are carried by the wind, fall on the female cone of another pine tree. Each pollen grain grows a pollen tube into the center of the cone and the nucleus cell of the pollen travels through the tube and reaches the egg, where it combines with the egg to form an embryo. The embryo eventually grows into a seed. The seeds of pine trees are then dispersed by wind or animals such as squirrels.

6 0
3 years ago
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