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Kisachek [45]
3 years ago
10

Where is light penetration in a river or stream likely to be lowest?

Biology
2 answers:
hichkok12 [17]3 years ago
7 0

Light penetration in a river or stream is likely to be lowest at: the mouth.
Dovator [93]3 years ago
5 0

Answer:

B

Explanation:

"Light penetration in a river or stream is likely to be lowest at the mouth of the river, and thus the answer is (b).

This is because the beginning of the river is mainly free of particulate matter and is clear and so there is an ample amount of light

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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
Does the shape of the pyramid illustrate The concept of ecological efficiency of 10%
Dimas [21]

There are so many examples for that in different areas, like biology experiment carried out in our lab recently.

Here's one linhttps://www.creative-biogene.com/support/Lentiviral-Vectors-the-Application-for-CAR-T-Therapies

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3 0
2 years ago
Explain the goal of gene therapy. What is one of the obstacles that this technology faces
faltersainse [42]
The goal is ultimately to cure diseases in hereditary, disabilities, and treat viruses and it faces some obstacles like ethics, other diseases can develop, and fundingthe goal is ultimately to cure diseases in hereditary, disabilities, and treat viruses and it faces some obstacles like ethics, other diseases can develop, and funding
3 0
3 years ago
Tendons in the shoulder girdle and other parts of the appendicular skeleton are tubes that carry blood throughout the body. conn
Harlamova29_29 [7]

Answer:

Connective tissues that attach muscle to bone.

Explanation:

The tissues that connect, bind, support or separate other tissues or other organs are called Connective Tissue. There are three major types of connective tissue -

  1. Loose connective tissue
  2. Dense connective tissue
  3. Specialized connective tissue

Tendon and Ligaments come under dense connective tissue category. Tendon is a fibrous connective tissue and connects muscles to bone. It has capability to withstand tension.

Ligaments connect bones to bones.

6 0
3 years ago
It’s easy to understand why multiple bands would be present in the lanes containing DNA that has been cut with restriction enzym
bulgar [2K]

Answer:

These bands represent different confirmation of DNA

Explanation:

pGLO DNA is a plasmid DNA that is used as a vector for genetic engineering. Plasmid DNA is found in supercoiled confirmation in vivo. The double helix forms extra twists to easily fit inside the cells. During isolation of plasmid from the cell, nicks can be introduced in the DNA due to harsh isolating methods or contamination by nuclease. As a result the supercoiled confirmation is changed into circular confirmation. It is bulkier than the supercoiled form and travels more slowly. When both DNA stands get cut at the same place, the DNA gets liner confirmation. In the end, supercoiled DNA runs the fastest on gel followed by linear DNA and then the circular DNA.

8 0
2 years ago
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