What does it mean if a scientist fails to reject a hypothesis

1 answer:

7 0

Basically they say "null hypothesis" according to source:

http://www.statisticshowto.com/what-does-it-mean-to-reject-the-null-hypothesis/

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Name two abiotic factors that contribute to the growth of phytoplankton?

Lynna [10]

Answer:

(autotrophs) need light, nutrients, CO2 (dissolved gases) to photosynthesize

Explanation:

The abiotic factors in the ocean help the ocean to 'work'. For example, phytoplankton (autotrophs) need light, nutrients, CO2 (dissolved gases) to photosynthesize. All of these factors are crucial to the primary producer!

Bacterial communities are an important part of biological diversity and biogeochemical cycling in aquatic ecosystems. In this study, the relationship amongst the phytoplankton species composition and abiotic environmental factors on seasonal changes in the community composition of free-living and attached bacteria in Lake Erhai were studied. Using Illumina high-throughput sequencing, we found that the impact of environmental factors on both the free-living and attached bacterial community composition was greater than that of the phytoplankton community, amongst which total phosphorus, Secchi disk, water temperature, dissolved oxygen and conductivity strongly influenced bacterial community composition. Microcystis blooms associated with subdominant Psephonema occurred during the summer and autumn, and Fragilaria, Melosira and Mougeotia were found at high densities in the other seasons. Only small numbers of algal species-specific bacteria, including Xanthomonadaceae (Proteobacteria) and Alcaligenaceae (Betaproteobacteria), were tightly coupled to Microcystis and Psephonema during Microcystis blooms. Redundancy analysis showed that although the composition of the bacterial communities was controlled by species composition mediated by changes in phytoplankton communities and abiotic environmental factors, the impact of the abiotic environment on both free-living and attached bacterial community compositions were greater than the impact of the phytoplankton community. These results suggest that the species composition of both free-living and attached bacterial communities are affected by abiotic environmental factors, even when under strong control by biotic factors, particularly dominant genera of Microcystis and Psephonema during algal blooms.

pls make me as brainlieast

6 0

3 years ago

Cross section of different areas of the same plant show cells with very different structure. What does this tell you about the d

BaLLatris [955]

Explanation:

-these are likely different tissue systems or organs

-they each may execute different specified functions

Cells sharing a similar origin, group together in the body to form tissues; these typically share physical features and are arranged in regular patterns. All living things, grow, respire, reproduce etc. these processes are carried out by cells, which are thus integral to their survival.

Further Explanation:

These tissues form systems that may be

meristematic- temporary, found at growth regions called meristems; they are undifferentiated or incompletely differentiated and continuously undergo growth and division
non meristematic- permanent tissue, already differentiated and are made up of plant tissue that no longer divides

Meristems differentiate into three main plant tissue types, which make up several tissues in various amounts:

ground
dermal
vascular tissues

Secondary tissue types are either complex, made up of several different call types, or simple, made up of the same cell type. Dermal tissue covers the plant's outermost layer, and mediates gaseous exchange. While two types of complex vascular tissue, are the xylem and phloem.

Xylem vessel elements: mature xylem vessel is made up of dead cells called vessel elements aligned end-to-end where these ends have been dissolved and the protoplasm is absent. These form long, continuous tubes that facilitate the unobstructed flow of water and minerals to other areas within the plant.

Learn more about cellular life at brainly.com/question/11259903

Learn more about tissue types at brainly.com/question/8487952

#LearnWithBrainly

5 0

4 years ago

Parts of a newly formed mrna strand which are joined together

EastWind [94]

Is there any thing you left out from your question. its not very clear on what exactly you want me to answer.

3 0

3 years ago

Gene therapy has been used to treat and cure cystic fibrosis. Cystic fibrosis is caused by a _________ in a single gene?

USPshnik [31]