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Lilit [14]
1 year ago
11

2. Which agricultural specialist is most likely to perform research to understand factors impacting the pH of soil?

Biology
1 answer:
Zina [86]1 year ago
7 0

Answer:

D. Agronomist

Explanation:

Agronomists are professionals that study how to make soils more productive (in terms of food) around the world. Soil pH is an index that calculates the acidity/alkalinity of the soil, which is indicated on a 14-point scale (pH equal to 7 = neutral; pH below 7 = acidic,  pH higher than 7 = alkaline). In this regard, it is well known that the pH of the soils drastically affects plant development, and thereby a proper soil pH is fundamental to ensure optimal plant growth (required for nutrient intake). For this purpose, agronomists are in charge of studying and researching the pH of the soils in order to increase crop yields. Nowadays, the pH of the soils can be easily measured by digital soil pH pocket testers that utilize a pH electrode in order to calculate the pH value.

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A forest has two groups of plants that appear to be very similar both phenotypically and genotypically. The major difference is
Gennadij [26K]
The basics would be that you'd need to find out if they could exchange genetic information. If not, they couldn't be considered part of one species. Set-up 2 artificial environments so both groups would produce pollen at the same time. Fertilise both plants with the other's pollen. Then fertilise the plants with pollen from their own group. 
Count the number of offspring each plant produces. 
If the plants which were fertilised by the opposite group produce offspring, they are of the same species. You can then take this further if they are of the same species by analysing if there is any difference between the number (and health) of offspring produced by the crossed progeny and by the pure progeny. You'd have to take into account that some of them would want to grow at different times, so a study of the progeny from their first sprout until death (whilst emulating the seasons in your ideal controlled environment). Their success could then be compared to that of the pure-bred individuals. 
Make sure to repeat this a few times, or have a number of plants to make sure your results are accurate. 
Or if you couldn't do the controlled environment thing, just keep some pollen one year and use it to fertilise the other group. 
I'd also put a hypothesis in there somewhere too. 
The independent variable would be the number of plants pollinated. The dependant variable would be the number of progeny (offspring) produced. 
5 0
2 years ago
In Zambia, which lions are likely to have migrated from a different population?
Margaret [11]
Zambian lions are split into two subpopulations, with one in the Greater Kafue Ecosystem in the west and the other in the Luangwa Valley Ecosystem in the east. Between these two geographically different regions lies Lusaka, Zambia's largest city, which is surrounded by farmland. males travel long distances to find new prides, while females remain in or close to the pride they were born in. So, for the lion, it's primarily males that are responsible for the movement of genes between prides. This male-mediated gene flow explains the lack of gene flow seen in mitochondrial genes compared to that of nuclear genes—female lions aren't making the journey, but they do mate with new males who come from far away.

Tried sorry
4 0
1 year ago
Q. A person’s blood glucose level fluctuates during the day, asrepresented in Figure 1. Two hormones, insulin and glucagon,are di
Minchanka [31]

Answer:

If the person has another meal after 5 pm, the glucose level in the blood will increase, and the insulin level too.

Several hours after the meal, the glucose levels will decrease, and the glucagon levels will increase.

Explanation:

When a person ingests another meal after 5 p.m, the glucose levels in the blood will increase, as the body does not need all that glucose right now the insulin levels in the blood will increase to store glucose for later. The glucagon levels after a meal are very low because the aim is to store glucose not use it.

Several hours after the meal, the body needs the energy to keep operating so it will use the glucose that was stored, to do this, the levels of glucagon in blood have to increase and release the glucose, and the levels of insulin in blood have to decrease.

7 0
2 years ago
d)In a further experiment, the researchers add a compound to the cell growth medium that both binds and releases protons (H+) an
vlabodo [156]

Answer:

The researchers add a compound to the cell growth medium that both binds and releases protons (H+) and also pass through lipid membranes. The effect that the added compound will have on the ATP production by the cells is that ATP synthase will stop.

5 0
1 year ago
The fact that plants can be cloned from somatic cells demonstrates that _____.A) differentiated cells retain all the genes of th
mojhsa [17]

Answer:

The correct answer is A) differentiated cells retain all the genes of the zygote

Explanation:

A plant can be cloned from the somatic cells which shows that the differentiated cell of plants have the ability to divide and differentiate to produce a new plant. This property of the cell is called totipotency.

All the cells in plants are not totipotent but some cells under proper condition can show the property of totipotency. Totipotency property shows that the differentiated cell is having all the genes that were present in the zygote.

This property of plant cells is used by scientist in plant tissue culture to produce plants for research and other purposes. So the right answer is A.

8 0
1 year ago
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