What evidence supports the statement that the stomata are fully open at a light intensity of 30 kilolux?

Which statement about DNA replication is FALSE?

Alexandra [31]

Answer:

C. DNA ligase adds nucleotides to the lagging strand

Explanation:

DNA replication is the process during cell division in which DNA copies itself. DNA strands unwind with the help of helicase to initiate the process. DNA Polymerase III is responsible for prokaryotic replication and adds nucleotides in 5' to 3' direction. Since both the strands of DNA run in opposite direction their replication is slightly different. The lagging strand is also formed by DNA Polymerase III in discontinuous manner leading to formation of Okazaki fragments. DNA ligase joins these fragments once the replication process is completed.

5 0

2 years ago

Environmental Effects Summary

Tpy6a [65]

Answer:

Methemoglobinemia

Explanation:

Methemoglobinemia (also known as the blue baby syndrome), is a condition with multiple etiologies which is associated with the lack of oxygen in the blood. This syndrome affects the function of red blood cells by altering the amount of hemoglobin protein, which carries and distributes oxygen to the body. Methemoglobinemia may be acquired by exposure to drugs and/or toxins. In this regard, it has been shown that high levels of nitrates in the water may induce this syndrome in infants.

4 0

1 year ago

The DNA is mostly _____ because the hyperchromic effect is very _____. The fact that there is any hyperchromicity at all means t

maria [59]

Answer:1.c 2.d 3. d

Explanation:

The DNA hyperchromic effect can be defined as the absorbance of radiation or light by the nitrogen bases of DNA. This phenomena is effective when the DNA is in single stranded condition. For observing the hyperchormic effect the DNA is required to be denatured at high temperature or by increasing the level of pH.

The two strands of the DNA when get separated the absorbance of the DNA solution also increases. This results due to reduction in the base-base interaction and hence, increases the absorbance of light like UV by the bases.

6 0

2 years ago

Read 2 more answers

The bone structure of the baleen whale and the hummingbird pictured above suggest that they share

Jobisdone [24]

Answer: The correct answer is- bone structure of the baleen whale and the hummingbird share common ancestor.

Bone structure of the baleen whale and the hummingbird are the homologous organs.

Homologous organs can be described as the organs of different animals, which possess same basic structure but perform different functions.

For example- The flippers of a whale and forelimb of man, bone structure of the baleen whale and the hummingbird.

Baleen Whales and hummingbirds have a basic tetrapod skeletons, which is inherited from a common ancestor. But their bodies have been modified and they have lost parts through natural selection. This results in different adaptation in the form of their respective lifestyles over many years.

4 0

1 year ago

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Dentify the relationships between the zooxanthellae and the hard coral, the remora and the manta ray, the tiger shark and the gr

sergeinik [125]

Answer:

1. Mutualism

2. Mutualism (it was previously thought to be a case of commensalism)

3. Predation

4. Competition

Explanation:

1. Zooxanthellae and hard coral - Mutualism

These two organisms live in symbiosis. This means that both benefit each other. Zooxanthellae allow corals to gain energy through photosynthesis and, in turn, they receive important nutrients that are produced during the metabolism of the hard coral.

2. Remora and manta ray - Mutualism

Remoras and manta rays benefit each other. Remoras attach to manta rays mainly for transportation and feeding, but they also do it for protection. In turn, they make sure manta rays are clear from harmful bacteria and parasites. Several years ago, it was thought that manta rays didn't gain any benefit from remoras, so this was thought to be a case of commensalism. However, research has shown that they both benefit from each other. Therefore, this is also a case of mutualism.

3. Tiger shark and green sea turtle - Predation

In some areas (not everywhere) tiger sharks feed upon green sea turtles. For example, in Hawaii, have been observed to attack green sea turtles and feed on them. Researchers have spotted numerous sea turtles with characteristic tiger shark bites.

4. Dolphins and school of trevallies - Competition

Trevallies are large species of fish that feed on small schools of fish like dolphins. They both have their own predatory strategies that involve planning and gathering to catch large amounts of fish. Therefore, trevallies and dolphins compete for small schools of fish.

5 0

2 years ago