Which is an example of one of the first land plants to evolve?

Answers

Answer 1

Answer: It is assumed that first land plants evolved from green algae 500 million years ago. The evidence of the first land plants comes from fossils of spores old nearly 500 million years. One of the first macroscopic land plants is Cooksonia which evolved about 425 million years ago.

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The chemical that promotes phototropism is _____.
Dr. Besson has invented a drug that she believes will be an effective treatment for migraines. If the drug is truly safe and effective, she may become quite rich, so she has a strong financial incentive to conduct research that proves that the drug is safe and effective even if it isn't. What aspects of the scientific process will tend to decrease the likelihood that she will publish low-quality research that mistakenly concludes that the drug is safe and effective?
A population of snowshoe hare rabbits live in a particular region of the arctic tundra that experiences high winds, extremely cold temperatures, and gets very little snow. Their main predator is nocturnal and hunts by sound. Which of the following mutations would best be classified as an adaptation?A Longer and more vascularized ears B Being less active in the day and more active at night C A dense undercoat of fur beneath a longer top coat of fur D A fur coloration pattern that allows them to visually camouflage with their surroundings
Osmosis is the diffusion of small molecules. -------------------------------------------------------------------------------- True False
What function do chloroplasts perform?

Which of the following is an example of epithelial tissue?A) the brachialis muscle
B) insulating fat
C) the outer lining of the parotid gland
D) hyaline cartilage covering bone

Answers

the one that is an example of epithelial tissue is : C. the outer lining of the parotid gland
the epithelial tissue lined up the surfaces and blood cavities all throughout our body and help it in the secretion and selective absorption process.
All glands that exist within out body are made up with epithelial cells.

Answer:

the one that is an example of epithelial tissue is : C

Explanation:

Scientists discovered similar fossils in rock masses on continents located both sides of the Atlantic Ocean.How does this discovery provide evidence supporting the theory plate of tectonics?

Answers

Explanation:

Because these fossils would have had no way to get across the ocean, especially for large terrestrial animals. The continents used to be in different locations, allowing some animals to cross. These animals then died on different continents as they shifted, thereby proving that the continents used to be much closer than they are now.

Given that equal amounts of the different mRNA’s were injected into fertilized frog eggs, which of the following conclusions is most consistent with the electrophoresis results?a. B-hemoglobin mRNA is translated more efficiently than is a-hemoglobin mRNA
b. a-hemoglobin is present only in cells where B-hemoglobin is absent
c. a-hemoglobin mRNA is more stable than B-hemoglobin mRNA
d. Tubulin inhibits translation of hemoglobin mRNA

Answers

Answer:

Answer is A. B-hemoglobin mRNA is translated more efficiently than is a-hemoglobin mRNA.

Explanation:

The introduction of electric charge into a gel or fluid, causing or resulting in the movement of the charged particles in the gel or fluid, is referred to as the electrophoresis. It can also be explained as a separation method or technique which is based on the movement of particles or ions in an electric field.

The electrophoresis is used in separating DNA fragments , RNA or protein, based on their size and charge.

In this food chain the __________ has the LEAST energy available to it for its life processes.

Answers

The last one on the chain, the last consumer, would have the least because each consumer gets about 10% less energy than the one before it :)

The top of the food chain

Which one of the following statements correctly defines active site? a.The active site is a site on the enzyme molecule where specific substrate molecules bind. b.The active site is a site on the substrate molecule where specific enzyme molecules bind. c.The active site is a site on the substrate molecule where specific product molecules bind.

Answers

A) The active site is a site on the enzyme molecule where specific substrate molecules bind .

hopes this helps :)

Which of the following processes would convert inorganic phosphorus in a rock to an organic form of phosphorus?

Answers

Weathering is a process by which inorganic phosphorous in a rock is broken down into soluble form by coming into contact with the atmosphere, water and the biological organisms. This phosphorous is then taken up by plants and converted into its organic form.

It's actually plant uptake.

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