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Otrada [13]
2 years ago
15

Helper t cells are activated by ________ on ___________ cells

Biology
1 answer:
inessss [21]2 years ago
5 0
Helper T cells become activated by interacting with antigen presenting cells. and the second blank space is either cytotoxic t cells or B cells
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Take the Global Trends Quiz. Click on "Answers" at the bottom of the quiz and check your work. What is expected to happen to the
jonny [76]

The number who reach sixty years of age will be higher because first of all, there will more and better health services available and the life expectancy of people is expected to rise.

5 0
2 years ago
In Montana, wild huckleberries rely on bears and other herbivores that consume their fruit to spread their seeds. As a result, t
yKpoI14uk [10]

Answer:

The consumption efficiency of huckleberry is high, like in forest ecosystem.

Explanation:

Huckleberry is a term mainly used to describe numerous variations of plants with different colored small berries.  These are a rich source of nutrition for wild bears of Montana.

These plants are residents of acidic and infertile vegetative areas, that is why these species do not grow in Antarctica, central Greenland and parts of the high arctic.

3 0
2 years ago
Alice and Julio’s company makes protective coverings for off-roading vehicles. Alice’s job involves harvesting a natural polymer
Fudgin [204]
<h2>Material Do Alice and Julio Likely Work - Option B</h2>

Alice and Julio’s company makes protective coverings for off-roading vehicles. Alice’s job involves harvesting a natural polymer from trees. Julio’s job is to take that material and change it chemically to create a synthetic polymer.

Alice and Julio most likely work with natural rubber and vulcanized rubber. Alice works with natural rubber, and Julio works with vulcanized rubber.

4 0
2 years ago
Read 2 more answers
The Florida panther faced a grim outlook, nearing extinction. Although still endangered, they are flourishing more than they wer
Leona [35]
Because florida will get more people as the same with texas thats my guess :/ not sure because i never did this question
6 0
2 years ago
Imagine that you want to breed a species of rose that has a wonderful smell. You have many different types of roses, but none of
Natalija [7]

Answer: if i want to breed a rose and i don't have a certain kind of rose, i have to cross between them until i have a kind of rose that express the phenotype i was looking for. Once i've got it, i'll try to cross it with another rose and generate more species like that to cross with the rose that express the phenotype, this favors to generate a specie that have a pure phenotype.

Explanation: The answer is explain by the Mendel's laws.

Mendel's second law:

if you have two roses that are heterozygous and you cross them, their offspring have a 25% probability of generating a homozygous phenotype for a certain recessive characteristic (such as the rich smell of roses that is not a dominant character), 50% of generate heterozygotes with a dominant phenotype, and 25% generate other homozygotes with a dominant phenotype.

Once the offspring with the recessive homozygous character are obtained, it is possible to start making crosses between those of a recessive nature and there Mendel's first law applies

All the homozygous recessive individuals that are crossed will have a 100% homozygous recessive offspring.

Also, if you cross heterozygotes with another heterozygotes the offspring will be 100% heterozygotes

3 0
2 years ago
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