1.Pine pollen grains often have air sacs.*

Biology

1 answer:

GalinKa [24]3 years ago

6 0

Answer:

1 true

Air-filled sacs in the pollen grains of pine trees allow pollen to travel farther through the air. ... Each pollen grain is attached to two or three air-filled sacs, or sacci, which develop from the outer layer of the pollen

2 true

process of meiosis involves two divisions of the genetic material. The first division is called the reduction division – or meiosis I

3 false

When a grain of pollen reaches the stigma, it creates a pollen tube for the sperm to journey down the style and fertilize the ovule; fertilized ovules become seeds. Fertilization is the death of the flower, as the petals drop or wither at this point and the ovary starts to enlarge and ripen into what we know as fruit.

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Photosynthesis and carbon fixation can only occur in the presence of light true or false

maw [93]

Hi there. I believe the answer is True. Hope I helped.

4 0

4 years ago

Read 2 more answers

Drag the appropriate labels to their respective targets. note that there are twice as many blanks as answer choices. in other wo

sleet_krkn [62]

The answer is: Wind direction impacts the design of airports, including the location and orientation of the runway.

<h3>Further explanation </h3>

Examine the accompanying wind rose diagram. Based on the information shown, determine the correct answers to the following questions.

Drag the appropriate labels to their respective targets. Note that there are twice as many blanks as answer choices. In other words, only half of the targets need to receive a label. Pay attention to the color coding and think carefully about the best position for each label when multiple locations seem possible.

The answer is: Wind direction impacts the design of airports, including the location and orientation of the runway. This relationship explains why planes circle above an airport so they can land in the correct orientation, and why they reorient themselves after taking off in a direction other than the direction they wish to fly. In our example, the longest spoke in the wind rose diagram indicates prevailing winds are coming from the NE and blowing toward the SW. Therefore, the correct orientation for the runway is along this path, with planes taking off in the SW to NE direction. This wind pattern can be found where NE trade winds are located.

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