The central nervous system is lacking in animals that have ____

1. Explain why living things need carbon and nitrogen. What are they used for?

amm1812

Answer:

Explanation:

all living organisms are built of carbon compounds. Nitrogen fixation: special bacteria convert the nitrogen gas into ammonia that plants then use. ... nitrogen is the required nutrient for living things to produce organic molecules. it's the building block of DNA, RNA, proteins, and nucleic acids.

8 0

3 years ago

Are electromagnetic wave present all the time

NISA [10]

Answer:

Yes, they present everywhere in our environment.

7 0

4 years ago

Since animals have nerve and muscle tissue and plants do not, which of the following events in earth’s history would be associat

storchak [24]

Answer:

The correct option is A) increase in atmospheric O2

Explanation:

The nerve cells and the muscle cells suggest that the the presence of oxygen in the atmosphere was an adaptive radiation which brought the existence of different animals. The conditions became favorable for different animals to survive on Earth only when the availability of oxygen improved in the atmosphere. As animal cells like the muscle cells require a constant supply of oxygen, we can hence say that increase in atmospheric oxygen was the adaptive radiation for supporting many group of animals.

4 0

4 years ago

A grow seeded purple flowered heterozygous plant (YyPp) is crossed with a green seeded, white flower plant (yypp). What is the p

vredina [299]

Question:

A yellow seeded, purple-flowered heterozygous plant (YyPp) is crossed with a green seeded, white-flowered plant (yypp).

(Y = yellow seed allele; y = green seed allele; P = purple flower allele; p = white flower allele)

What is the probability that an offspring of this cross produces plants with green seeds and white flowers? Assume the traits assort independently.

Answer:

The probability that an offspring of this cross produces plants with green seeds and white flower is 25% = 0.25

Explanation:

Available data:

Y = yellow seed allele; Dominant
y = green seed allele; Recessive
P = purple flower allele; Dominant

p = white flower allele; Recessive
the traits assort independently

Cross: A yellow seeded, purple-flowered heterozygous plant with a green seeded, white-flowered plant

Parentals) YyPp x yypp

Gametes) YP, Yp, yP, yp yp, yp, yp, yp

Punnett square)

YP Yp yP yp

yp YyPp Yypp yyPp yypp

F1) 4/16 = 1/4 = 25% YyPp, Yellow seeds and Purple flowers

4/16 = 1/4 = 25% Yypp, Yellow seeds and white flowers

4/16 = 14 = 25% yyPp, green seeds and purple flowers

4/16 = 1/4 = 25% yypp, green seeds and white flowers.

The probability that an offspring of this cross produces plants with green seeds and white flower is 25% = 0.25

5 0

3 years ago

___ competiton drives natural selection, as individual members of a species compete with each other for limited natural resource

goldenfox [79]

Intraspecific competition drives natural selection,as individual members of a species compete with each other for limited natural resources.

5 0

4 years ago

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The central nervous system is lacking in animals that have _____.