Describe two different ways that a pollen grain can get to the stigma of a pistil ?

1 answer:

7 0

One of the ways is through the wind. The pollen then needs to be very light, and have a shape that supports being carried by the wind. It is then caught by the sticky surface of the stigma.

Another way is through animals, such as bees. The bees feed on the flowers and the pollen sticks to their legs. When they fly off to another flower, they will leave the trace of this pollen there. In fact many flowers attract bees for this reason, with their colour or smell.

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When the President issues an executive order as a result of an Act of Congress it:

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has to be approved of by the supreme Court

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2 years ago

which geographic feature served as a barrier to political unity and encouraged the rise of independent city-states in acient gre

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I would say that this was a combination of two features: the fact that Greece is mountainous ( I think this is the major reason) so the cities were located in valleys that were not easily accessible from other valleys, and that there were many islands
These both features made communication more difficult and defense easier.

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Lucy is conducting market research to gauge home owners' interest levels in different types of imported rugs. However, because t

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Answer:Validity

Explanation:

Validity is measure of how valid the research is which means it gives solid relevant result which were initially intended. It is a test of how valid both your design and method of the research is.

There are various factors that can affect validity of the research.

There are internal factors that can affect validity of the research those are the ones that occur within the study such as failure to monitor vital variables of the study or using the inaccurate instrument to gather the needed data.

Below are the factors that has an impact on internal validity.

-size of the studied population

-instruments used

-history

-subject variability

-available time to gather data

- attrition

External validity are affected by the external factors such as the place where you conduct your research which may restrict the ability to obtain actual results . It can also be affected by the things like not being able to balance your subjects for example focusing on one gender and race eventhough your research is about all the types of people at large.

Crucial factors that affects external validity.

- The effect of time

- method use to collect data

- characteristics of the chosen population

- experiment effect

- interaction of subject selection

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3 years ago

Jaime's RBT is going to collect 15 minute time samples of his hand-raising behavior in each class over a three-week period by a

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Jaime's RBT is going to collect 15 minute time samples of his hand-raising behavior in each class over a three-week period by a frequency count. This is discontinuous data.

<h3>What is discontinuous data?</h3>

This is the type of data that is known to have a sample of only one kind of observation in a research.

To do this, an observation may have to be divided into equal ratio and intervals.