1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lisa [10]
3 years ago
13

there are twenty standard amino acids that make up all proteins. What four elements are found in all amino acids?

Biology
2 answers:
Westkost [7]3 years ago
6 0
Hydrogen, oxygen, nitrogen, and carbon
kkurt [141]3 years ago
6 0
Hydrogen and oxygen..........
You might be interested in
How have earth scientists improved our understanding of the environment?
ANTONII [103]
Th earth scientists have improved our understanding with the environment because of their studies in which they had shown better understanding and explanation of occurrences with the means of having to provide not only explanation nor visuals but also providing proof of these mere existence that made people believe and understand the environment.
6 0
3 years ago
Meiosis does PMAT twice! That means there is a prophase I and a prophase 2. There is a metaphase1 and metaphase 2. Etc... How wo
Gennadij [26K]
<h3><u>Answer;</u></h3>

In metaphase I, the chromosome tetrads align on metaphase plate while in metaphase II, chromosomes align on metaphase plate as they are in mitosis with only sister chromatids.

<h3><u>Explanation;</u></h3>
  • Meiosis is a form of cell division that halves number of chromosomes when forming specialized reproductive cells such as gametes .
  • Meiosis occurs in two phases, namely; meiosis I and meiosis II. During homologous pairs of chromosomes align on the equatorial plane at the center of the cell.
  • During metaphase II, the spindle fibers connect to the kinetochore of each sister chromatid. The chromosomes align at the equatorial plane, which is rotated 90° compared to the equatorial plane in meiosis I.

4 0
3 years ago
How many animal cell are in the human body​
SIZIF [17.4K]

Answer:

Your body has different kinds of cells. Though they might look different under a microscope, most cells have chemical and structural features in common. In humans there are about 200 different types of cells and within this cells there are about 20 different types of structures or organelles.

5 0
3 years ago
Using a Periodic Table, identify two elements
sergejj [24]

Answer:

Na, Si, Mg.

Explanation:

  1. Sodium
  2. Silicon
  3. Magnesium
6 0
3 years ago
7. Crocodilian anatomy has been unchanged for approximately two eras.<br> True<br> False
GuDViN [60]

Answer:

true

Explanation:

check on studypool .com for more information on this topic

8 0
3 years ago
Other questions:
  • What is the relationship between earth’s surface and living organisms?
    12·1 answer
  • Cycadophyta is a group of plants with a small number of extant species, that is nevertheless well known from fossils from the Me
    8·1 answer
  • 1. Explain the difference between genes and alleles.
    5·1 answer
  • Which of the following statements is true? Water is the energy source for plant photosynthesis. Chlorophyll is contained in orga
    11·2 answers
  • Which event is most likely to cause a sudden change in weather?
    6·1 answer
  • Each one of the boxes on the Punnett square represents what probability of a offspring genotype?
    6·2 answers
  • Which describes the temperature for successful sperm production? slightly higher than body temperature slightly lower than body
    10·2 answers
  • Sir Isaac Newton probably never conducted any experiments.<br> True<br> False
    11·2 answers
  • A biology class is studying the concept of carrying capacity. On a field trip, the
    11·1 answer
  • The gradual change in plants communities of a sand dune ecosystem can be classified as
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!