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raketka [301]
3 years ago
6

Natural selection is based on Darwin's observation that individuals most likely to survive and reproduce are those

Biology
1 answer:
aivan3 [116]3 years ago
8 0

Answer:

with traits best suited to their current environment

Explanation:

Natural selection proposes that nature selects those organisms that are well adapted to the prevailing environmental conditions to survive and reach reproductive maturity with the favourable characteristics being passed on to the offspring. Those organisms that are poorly adapted die leaving no offspring and their traits are eventually eliminated.

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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
A cell in early interphase has 10 chromosomes. How many chromatids will the same cell have during prophase?.
Anon25 [30]

Answer:

20

Explanation:

3 0
2 years ago
SOMEONE PLEASE HELP ME WITH THIS I REALLY WANT TO PASS!!!!!!!!!!
Kay [80]
Its fossils or its nvm its definitely fossils
3 0
3 years ago
why the change in only one DNA base of a gene could result in a different protein produced by the gene?
Ludmilka [50]

It happens because of Point mutation

Explanation:

A point mutation can be understood as when one nucleotide is added, deleted or changed. Through change in DNA structure a gene can be altered and it is called mutation. Point mutation’s other term is insertion as well as deletion. It mostly involves in substitution.

Rarely, Point mutation is responsible for huge change. Basically, two types of point mutation happen. They are transition or transversion mutations.  

7 0
2 years ago
While working with heat in the laboratory, which of the following should you do?
FromTheMoon [43]
Its definetly not C or D and B sounds ridiculous so its A.
7 0
2 years ago
Read 2 more answers
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