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Taya2010 [7]
4 years ago
6

Why do bryophytes and ferns depend on free water to complete their life cycle?

Biology
1 answer:
BlackZzzverrR [31]4 years ago
8 0

Bryophytes and ferns need water as the medium to complete their life cycle. The male sex cell of both is flagellated and hence motile. These flagellated male cells combine with the female cells to fertilize.

However, for the process of fertilization, the male cell has to swim and reach the female sex organ. Both bryophytes and ferns require a moist surrounding in order to reproduce.

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Help please, will give brainly-
ASHA 777 [7]

Answer:

A pNP concentration range of 0 to 100µM (or 0 to 0.1 mM) is used by making appropriate dilutions from the working stock (preferably in 1ml total volume).

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3 years ago
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This should be the answer you’re looking for

4 0
4 years ago
A scientist wanted to see if the number of eggs in a nest varied according to latitude. She decided to study a specific species
77julia77 [94]

Answer:

A. Does the number of eggs in a nest of this bird species vary with the latitude of the area the bird lives in?

B. The latitude of the area

C. The number of eggs

D. The species of the bird

E. The number of the bird eggs in a nest in a temperate zone area will be greater than that of a tropical area.

F. 600 nests

G. The number of eggs

Explanation:

A. In the investigation, the scientist wanted to see if the number of eggs in a nest varied according to latitude, therefore, the question she will be seeking an answer to is: does the number of eggs in a nest of this bird species vary with the latitude of the area the bird lives in?

B. The independent variable is the variable that is not affected by the other variables being measured in an investigation. In the investigation by the scientist, the latitude of an area is the independent variable in that it is independent of changes in the other variable- the number o eggs- in the investigation.

c. The dependent variable is the variable that is affected by changes to the other variable in an investigation. The number of eggs is expected to vary according to latitude, is therefore, it is the dependent variable.

D. The constant is the factor that does not change during the experiment. The bird species is the constant as it does not change in the investigation.

E. A hypothesis is a specific statement predicting the result of an investigation or study.

In this study, the hypothesis could be: The number of the bird eggs in a nest in a temperate zone area will be greater than that of a tropical area.

F. The sample size gives the the total number of subjects,  individuals or observations in a study. In this case, the subjects are bird nests, and the sample size is 600 nests.

G. The number of eggs in all the nests were counted; therefore, it is the repeated measure.

7 0
3 years ago
Name a storage protein in our bodies.
Keith_Richards [23]

Answer:

Storage proteins serve as biological reserves of metal ions and amino acids, used by organisms. They are found in plant seeds, egg whites, and milk. Ferritin is an example of a storage protein that stores iron. Iron is a component of heme, which is contained in the transport protein, hemoglobin and in cytochromes.

Explanation:

Hope this helps.

5 0
3 years ago
Which will cause a decrease in gas pressure in a closed container?
ludmilkaskok [199]

Answer:

C

Explanation:

Reducing more volume will mean that the density of gas is higher and therefore it would be at higher pressure. Adding more gas would have the same effect.

Lowering the temperature would mean that the molecules would be moving slower and therefore decreasing pressure

7 0
3 years ago
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