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V125BC [204]
3 years ago
14

A plankton biologist has discovered a new species and he needs your help classifying it into the proper kingdom. all you can obs

erve is that this microscopic organism has just one nucleus in its cell, and it has chlorophyll, so it must be photosynthetic. what kingdom does it belong to?
Biology
1 answer:
inn [45]3 years ago
5 0
This species belongs to the kingdom Plantae
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Muscles that are often weak in people who are sedentary or overweight are known as ________ muscles.
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Trunk flexor muscles. Hopes this helps.
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3 years ago
True or false paleolithic people probably lived in small nuclear family units
skad [1K]

The given statement is false, as Paleolithic people thrived in the groups of 20 to 30 individuals.  

At the time of Paleolithic, the hominins gathered together in brief societies, like bands, and survived by fishing and gathering plants, scavenging or hunting wild animals. The Paleolithic era is featured by the application of knapped stone tools, however, tools made up of woods and bones were also used by humans at that time.  


7 0
3 years ago
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
2 years ago
what is the example of repetitive motion disorder ( fibromyalgia , muscular dystrophy , multiple scleriosis , carpel tunnel synd
12345 [234]
Carpel tunnel syndrome
3 0
3 years ago
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A forest ecosystem can support a limited number of bears. This is because?
Gre4nikov [31]

Answer:

A forest ecosystem can support a limited number of bears because bears are the supreme predators of their ecosystem and very few animals can hunt bears so nature by supporting a limited number of bear populations supports a balanced number of population of its prey like insects, fishes, deer.

Another reason for the limited population of bear is that bear occupies the highest trophic level in the ecosystem so according to 10% law of energy transfer, it will get very less energy from its food so it needs to eat more.  

Therefore the population of bears is limited because the environment can not meet the energy requirement of many bears so a forest ecosystem can support a limited number of bears.

8 0
3 years ago
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