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LiRa [457]
3 years ago
6

Why do most angiosperms have alternate phyllotaxy, with leaf emergence at an angle of 137.5° compared to leaves above and below?

Biology
1 answer:
Elanso [62]3 years ago
4 0

Answer: The answer is D: to allow maximum exposure to light and to reduce shading of lower leaves.

Explanation:

The arrangement of leaves on a Stem is known as Phyllotaxy. It is used to enable them obtain maximum exposure to sunlight.

Leaves are classified as either alternate, spiral or opposite.

Leaves with alternate pattern arise at a different point (node) on the stem. This helps reduce shading of the lower leaves.

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Bio tic Factors. An ecosystem is a community of organisms that interact with each other and with the  and biotic factors in their environment. Abiotic factors are chemical and physical factors such as temperature, soil composition, and climate, along with the amount of sunlight, salinity, and pH.

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7 0
3 years ago
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QuesliuII 1 (1 Pull)
seraphim [82]
Not TOO sure here, buuuut I’m pretty sure it’s TRUE because a state is much more complex then a whole country, and therefore has a lot more constitutions.
8 0
3 years ago
Which word descibes a plant's response to its environment?<br><br> -Tropism<br><br> -gravity
matrenka [14]
I would say tropism because plants can’t respond to their environment by controlling gravity!
3 0
3 years ago
Which of the following is true concerning DNA replication? (1 point)
n200080 [17]

Answer:

The leading strand is copied in the 5' to 3' direction and the lagging strand is copied in the 3 to 5 direction.

Explanation:

1. The original DNA molecule remains intact, although it acts as a template for the formation of a copy that contains two new antiparallel strands. - this is false.

DNA replication is said to be "semi conservative". This is because in making a new DNA molecule, one of the strands is from the original DNA molecule and one is new. This is true for each new molecule produced One DNA molecule makes 2 new molecules, each containing one of the original strands

2. The leading strand is copied in the 5' to 3' direction and the lagging strand is copied in the 3 to 5 direction. This is true. The synthesis of each strand occurs through a distinct mechanism. The leading strand is synthesised 5'-3' (towards the replication fork), and the lagging strand is synthesised from 3'-5', away from the replication fork. T

he leading strand is synthesised continuously using an RNA primer to begin the process. The lagging strand is synthesised discontinuously, with several short primer sequences permitting the synthesis of short fragments (Okazaki fragments) that are later joined by DNA ligase. <em>NB: this is easy to remember if you consider that </em><em>3 lags behind 5</em>

3. Both strands are copied to form Okazaki fragments, which are later annealed by DNA Ligase. This is false. Only the lagging strand replicates to  form Okazaki fragments

4. The replication process proceeds on both strands in the same direction, which requires that RNA primers bind to the lagging strand. This is false. The strands are synthesised in different directions

5 0
3 years ago
When Leslie goes to the eye doctor, her doctor puts drops in her eyes to dilate her pupils. This drug is a sedative that has its
pishuonlain [190]

Answer:

Iris.

Explanation:

Eye is one of the most important sense organ of the body that helps to receive the light and also helps in the maintenance of the body equilibrium. The pupils regulate the amount of the light that enters in the eyes.

The Leslie has some eye problem and doctors use a sedative in her eyes. The sedative drug has the largest effect on the iris of the eye. The iris decides the color of the eye and also regulate the proper functioning of the pupil of eye.

Thus, the correct answer is iris.

6 0
3 years ago
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