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Leokris [45]
3 years ago
14

Who created the earliest system for the classification of animals?

Biology
1 answer:
horsena [70]3 years ago
5 0
ARISTOTLE first classified organisms.... in 4th century B.C.
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Sort the following events into two categories:________.
Amanda [17]

Answers:

a) carcinogenic

b) anti-carcinogenic

c) carcinogenic

d) carcinogenic

e) carcinogenic

f) anti-carcinogenic

g) anti-carcinogenic

h) anti-carcinogenic

Explanation:

Cyclins are proteins that regulate the progression through the cell cycle, i.e., the transition of G1 to S phase. It is well known that high cyclin expression may lead to cell proliferation states, which is closely associated with cancer progression. Moreover, the blockage of cyclins may have an anti-carcinogenic effect by inhibiting the progression through the cell cycle. MAP kinases are serine/threonine kinases that regulate the progression through the cell cycle by phosphorylating a variety of substrates during cell proliferation. In consequence, phosphatases that inactivate MAPK kinases (i.e., by dephosphorylation) may have an anticarcinogenic effect. The p53 is a tumor suppressor protein involved in diverse cellular processes including DNA repair, cycle arrest and programmed cell death. This protein (p53) is activated by phosphorylation at target residues and phosphatases inactivate it, thereby the blockage of its degradation may have an anticarcinogenic effect. Oncogene activation (i.e., the expression of oncogenes), may alter diverse cellular processes including DNA replication, and thereby may lead to cancer development. The G-protein α subunit is a GTPase that hydrolyses GTP and thus has a major role in controlling the kinetics of the G-protein signaling cascade. Platelet-derived growth factor receptors (PDGFR) are kinase receptors that play roles in regulating cellular differentiation, cell proliferation and cell growth. PDGFR receptors are present on the surface of normal cells, however, it has been shown that mutations of the PDGFR genes that lead to their high expression lead to uncontrolled cell growth and consequently cause cancer (i.e., by increasing PDGF signaling).

5 0
3 years ago
1. The seed coat or shell of the seed protects the seedling from the outside world. What is this similar to in a plant cell?
gavmur [86]

Answer:

1. Cell wall

I'm not sure what system the seedling is in though

8 0
3 years ago
Explain the movement of carbon through photosynthesis and cellular respiration
Gnoma [55]
<span>Photosynthesis makes the glucose that is used in cellular respiration to make ATP. The glucose is then turned back into carbon dioxide, which is used in photosynthesis. While water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.
</span>
5 0
4 years ago
The major role of the respiratory system is to __________.
fgiga [73]
Provide organs and muscles with the oxygen they need to function
4 0
3 years ago
Characteristics of volume
Irina-Kira [14]

Answer:

Can be a member of a disk pool or a volume group

Capacity allocated up front

No minimum provisioned capacity required

Provides best performance and latency characteristics

Explanation:

might want to change those up a bit for your assignment its pretty obvious u didnt do it lol :)

3 0
3 years ago
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