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Sonja [21]
2 years ago
15

Which is defined as a cell structure made of DNA that gives all of the master instructions for the cell?

Biology
1 answer:
Doss [256]2 years ago
7 0

Answer:

a chromosome is a cell structure made of DNA,which is found in the nucleus of a cell.

I hope this helps

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To test a new drug that has the potential of curing people of the common cold, a company asked human volunteers who were coughin
MAVERICK [17]

Answer: To help researchers conclude that results are related to the new drug and not to the orange juice.

Explanation:

I could be wrong, Hope this helps

7 0
3 years ago
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Define each of the following terms and explain how each of them can benefit the plant.
Aneli [31]

Answer:

definition with benefit is given below of

1st. gravitropism

2nd. phototropism

3rd. thigmotropism

4th. photoperiod

Explanation:

1st is gravitropism

gravitropism is process in which plant grow in the direction that gravity act

It is also called geotropism

and

Gravitropism is important for plants because it directs the roots to grow in the downward direction that is important for obtaining nutrients

2nd is phototropism

phototropism  is the process in which plant growth directed by the light

and

we know plants need light to carry out photosynthesis

so  Phototropism direct the growth of the stem and branch toward sunlight

3rd is thigmotropism

thigmotropism is the directional change in growth of plant in response to a touch stimulus

and

thigmotropism is especially important for climbing plant that is use support to climb up

4th is photoperiod

photoperiod is the physiological change in organism in the response to length of the day and night

and

it play important role to determining the physiological developmental process in the plant such as budding and tuberization

6 0
2 years ago
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Bone formation begins when ____________ secrete the initial semisolid organic form of bone matrix called ____________ .
butalik [34]

Answer:

a. osteoblasts

b. osteoid

Explanation:

Osteoblasts are the fundamental cell of bone tissue. They are the cells that synthesize the bone matrix called osteoid from which it is made from the skeleton of bone fish, to the skeleton of humans. Since the bone skeleton is an evolutionary paraphiletic characteristic (it is present in several taxonomic groups that have evolved from the same ancestor).

Osteoblasts are responsible for the development and growth of bones during the juvenile stage of individuals and are also responsible for maintaining adult bone and regenerating bone when it breaks.

Osteogenesis is the process of differentiation of osteoblasts. The cells from which osteoblasts differ are called osteoprogenitors. The differentiation of osteoprogenitor cells, which come from the mesoderm, periosteum or bone marrow, is induced by growth factors called bone morphogenetic proteins (BMPs), capable of inducing the growth of bone, cartilage or connective tissue. When an osteoprogenitor cell receives a BMP signal, it quickly begins to express the genes to generate collagen, osteonectin and alkaline phosphatase, among other compounds necessary for bone growth. When the bone grows, it ends up wrapping some of the osteoblasts and they lose their ability to replicate, at that time they are dedicated to bone maintenance and not to their synthesis and are called osteocytes.

6 0
2 years ago
What are gametes?
solmaris [256]

Answer:

<h3>male and female reproductive cells </h3>

Explanation:

<h3>I hope it helps ❤❤</h3>
6 0
2 years ago
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What causes Global Warming?
Igoryamba

Answer:

B. The burning of fossil fuels released greenhouse gases into the atmosphere causing the planet to get warm.

Explanation:

5 0
3 years ago
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